If this gel were used in a court case as DNA evidence taken from the crime scene, which of the following suspects appears to be guilty?

AKU Practice Mock 3
Science Reasoning
A) Suspect A
Show Explanation
B) Suspect B
Show Explanation
C) Suspect C
Show Explanation
D) Suspect D
Show Explanation

Organic compounds are molecules that frequently contain carbon, hydrogen, and oxygen joined together by covalent bonds.

As the number of bonds to oxygen atoms increases in a carbon chain, the overall molecule is increasingly oxidized. For example, aldehydes are more oxidized than alcohols, which are more oxidized than alkanes as shown in Table 1.

The melting points and viscosities of these compounds are listed in Table 2 and Table 3 respectively.

According to Table 2, the difference in melting point between an alkane and an alcohol with the same number of carbons is approximately how much?

AKU Practice Mock 2
Science Reasoning
A) 25 K
Show Explanation
B) 35 K.
Show Explanation
C) 45 K.
Show Explanation
D) 65 K.
Show Explanation

When in use and ignoring the weight of the jib, a weight of 60 000 N at a distance of 6m from the vertical axis would need a counterbalance at 4 m from the vertical axis of

AKU Practice Mock 3
Science Reasoning
A) 9000 N
Show Explanation
B) 40 000 N
Show Explanation
C) 80 000 N
Show Explanation
D) 90 000 N
Show Explanation

The mechanism of action of four drugs that inhibit DNA replication is stated below.
● Aphidicholine inhibits DNA polymerase.
● Cytarabine is converted into a molecule that can substitute for a DNA nucleotide and also inhibits DNA repair mechanisms.
● Epirubicin inhibits an enzyme involved in the unwinding of DNA and separation of strands.
● Hydroxycarbamide inhibits an enzyme involved in the production of deoxyribonucleotides.

Which row correctly matches a drug to an explanation of the mechanism of action?

AKU Practice Mock 1
Science Reasoning
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation

Organic compounds are molecules that frequently contain carbon, hydrogen, and oxygen joined together by covalent bonds.

As the number of bonds to oxygen atoms increases in a carbon chain, the overall molecule is increasingly oxidized. For example, aldehydes are more oxidized than alcohols, which are more oxidized than alkanes as shown in Table 1.

The melting points and viscosities of these compounds are listed in Table 2 and Table 3 respectively.

According to Tables 1 and 3, which organic compound has the highest viscosity?

AKU Practice Mock 2
Science Reasoning
A) Octanol
Show Explanation
B) Octanaldehyde
Show Explanation
C) Hexanol
Show Explanation
D) Butane
Show Explanation

The game of “NIM” involves rows of matches laid out to make a triangle. When it is your go, you must take one or more matches away BUT THEY ALL MUST COME FROM THE SAME ROW. You win if you force the other person to take the last match. The diagram shows the game at the start and in midplay. It is your go. Which match(es) should you take to win the game?

AKU Practice Mock 1
Science Reasoning
A) 1 only
Show Explanation
B) 3 and 4
Show Explanation
C) 3 and 5
Show Explanation
D) 2, 3 and 4
Show Explanation

A 3 × 3 × 3 cube is made up of small 1 × 1 × 1 cubes. Then the middle cubes from front to back, from top to bottom and from right to left are removed.

How many 1 × 1 × 1 cubes remain?

AKU Practice Mock 2
Science Reasoning
A) 15.
Show Explanation
B) 18
Show Explanation
C) 20
Show Explanation
D) 21
Show Explanation

What is the minimum number of points which have to be removed from the picture given below so that in the remaining picture no three points lie in one line?

AKU Practice Mock 3
Science Reasoning
A) 1
Show Explanation
B) 2
Show Explanation
C) 3
Show Explanation
D) 4
Show Explanation

Given this information in the text of Figure 1, the total amount of time needed to build the crane is approximately

AKU Practice Mock 3
Science Reasoning
A) One week
Show Explanation
B) Ten days
Show Explanation
C) Two weeks
Show Explanation
D) A calendar month
Show Explanation

In a basket, the number of oranges gets doubled after every minute. If the basket is completely filled in 120 minutes, how long would it have taken to get half filled?

AKU Practice Mock 1
Science Reasoning
A) 60 minutes
Show Explanation
B) 97 minutes
Show Explanation
C) 118 minutes
Show Explanation
D) 119 minutes
Show Explanation

The piano is a large and versatile stringed musical instrument. The full name is ‘pianoforte’ meaning ‘soft-loud’.

The concert grand piano has a keyboard with 88 keys, each of which, when depressed, sets a mechanism in motion, resulting in a felt-covered hammer hitting strings and causing them to vibrate.

The pianist has control over whether notes are sounded loudly or softly depending on how hard he or she presses the key.

When the key is pressed, the lever body lifts and rotates, causing the jack to lift the hammer. When the jack hits the regulating rail (not shown), it rotates relative to the lever body and the hammer continues upwards without being pushed, hitting the string whilst moving freely.

A grand piano has three pedals; the left pedal moves the hammers relative to the strings so that the notes are played more softly; the right pedal lifts the dampers from all the strings; the center pedal causes any dampers that are already lifted by the player’s keystrokes to remain in the up position as long as the pedal is down.

When the hammer hits the strings, the energy transfer sequence relevant to the sounding of the note is

AKU Practice Mock 2
Science Reasoning
A) Potential energy of a hammer → potential energy of a string → sound energy
Show Explanation
B) Kinetic energy of hammer → potential energy of string → sound energy
Show Explanation
C) Kinetic energy of a hammer → kinetic energy of a string → sound energy
Show Explanation
D) Potential energy of hammer → kinetic energy of string → sound energy
Show Explanation

A system of pulleys is a simple machine for changing the direction of a force and/or gaining mechanical advantage. Mechanical advantage is the size of the load divided by the size of the applied force.

In the simplest case, a single pulley can allow a horizontal force to support or raise a load. Assuming that friction in the system is negligible, the load can be supported or raised by a force F equal to the weight W of the load. The tension T is assumed to be constant throughout the length of the rope and all pulleys and ropes are assumed to be light and smooth.

The mechanical advantage of this single pulley system is 1 because the

AKU Practice Mock 2
Science Reasoning
A) The direction of the force is moved through one right angle.
Show Explanation
B) The size of the force needed to raise the load is equal to the size of the load.
Show Explanation
C) The weight of the load is equal to the distance moved by the force.
Show Explanation
D) The tension in the rope is equal throughout its length.
Show Explanation

A system of pulleys is a simple machine for changing the direction of a force and/or gaining mechanical advantage. Mechanical advantage is the size of the load divided by the size of the applied force.

In the simplest case, a single pulley can allow a horizontal force to support or raise a load. Assuming that friction in the system is negligible, the load can be supported or raised by a force F equal to the weight W of the load. The tension T is assumed to be constant throughout the length of the rope and all pulleys and ropes are assumed to be light and smooth.

In order to raise the load by a distance h the point X must be moved to the right a distance equal to

AKU Practice Mock 2
Science Reasoning
A) 0.5h
Show Explanation
B) h
Show Explanation
C) 1.4h
Show Explanation
D) 2h
Show Explanation

What could be the identity of unknown metal #1 and #2?

AKU Practice Mock 3
Science Reasoning
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation

Which of the following is the most likely reason that amounts greater than 0.125 mol of NaCl were not tested in Experiment 3? The results showed that

AKU Practice Mock 1
Science Reasoning
A) Adding more NaCl no longer increased the reaction rate
Show Explanation
B) Adding more NaCl would decrease the reaction rate
Show Explanation
C) The boiling point was reached, so no further data could be gathered with this procedure
Show Explanation
D) More Fe would need to be added for any greater increase in temperature to occur
Show Explanation

Hot, concentrated aqueous sodium hydroxide and chlorine react as shown in the equation:

6NaOH + 3Cl2 → 5NaCl+ NaClO3 + 3H2O

Which of the following statements is/are correct?

1. Chlorine has an oxidation state of +5 in NaClO3.

2. This is an example of a disproportionation reaction.

3. Some of the oxygen in the hydroxide ions is oxidised.

AKU Mock 1
Science Reasoning

A dog and a cat walk in the park along the path marked by the thick black line. The dog starts from P at the same time as the cat starts from Q. The dog walks three times as fast as the cat. At which point do they meet?

AKU Practice Mock 2
Science Reasoning
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Two species of animal are found in the same area of forest and grassland. In the spring and summer they eat the same plant food. However, in the autumn and winter one eats nuts in the forest and the other eats roots on the grassland. Both species are preyed upon by the same predator. Numbers of root-eating animals are reduced most by this, but they recover faster since they reproduce faster.

What can be concluded about these two species of animals?
I. They are part of the same community.
II. They are at different trophic levels.
III. They occupy different habitats.
IV. They have different niches

AKU Practice Mock 1
Science Reasoning
A) I and II only
Show Explanation
B) I and IV only
Show Explanation
C) II, III and IV only
Show Explanation
D) I, III and IV only
Show Explanation

Based on the average results of Experiments 1 and 2, which of the following brands of tape adhered better to the paper than to the plastic?

AKU Practice Mock 3
Science Reasoning
A) Brand X
Show Explanation
B) Brand Y
Show Explanation
C) Brands X and Y
Show Explanation
D) Brands Y and Z
Show Explanation

The reaction between hydrogen and nitrogen in the presence of an iron catalyst is known as the Haber process. It is a reversible reaction. The energy profile for this reaction is shown.

What is the energy change when one mole of ammonia is decomposed into its component elements?

AKU Mock 1
Science Reasoning

Organic compounds are molecules that frequently contain carbon, hydrogen, and oxygen joined together by covalent bonds.

As the number of bonds to oxygen atoms increases in a carbon chain, the overall molecule is increasingly oxidized. For example, aldehydes are more oxidized than alcohols, which are more oxidized than alkanes as shown in Table 1.

The melting points and viscosities of these compounds are listed in Table 2 and Table 3 respectively.

Which organic compounds in Table 2 are solids at 215 K?

AKU Practice Mock 2
Science Reasoning
A) All alkanes, alcohols, and aldehydes with 5 carbons or fewer
Show Explanation
B) Alcohols and aldehydes with 6 or more carbons and octane
Show Explanation
C) The 4- and 5-carbon alcohols and aldehydes, and all alkanes with 7 or fewer carbons
Show Explanation
D) The 5-carbon pentane and pentanol compounds and the 4-carbon butane, butanol, and butanaldehyde
Show Explanation

A volunteer was injected intravenously with several test substances to determine the effect of each substance on normal body variables. The results are shown in Table 1. Assume that enough time was allowed between injections so that the substances do not interfere with one another.

Based on the information in Table 1, which of the following is most likely substance B?

AKU Mock 1
Science Reasoning

Which two suspects, while not guilty, could possibly be identical twins?

AKU Practice Mock 3
Science Reasoning
A) A and B
Show Explanation
B) A and C
Show Explanation
C) B and C
Show Explanation
D) B and D
Show Explanation

Which two of the following statements about genetic variation are correct?
1. Asexual reproduction always produces genetic variation.

2. Gamete production is the only possible source of genetic variation in sexual reproduction.

3. The environment can cause genetic variation.

4. Mutations can produce genetic variation.

AKU Mock 1
Science Reasoning

During tracheotomy (a tube is inserted directly into the trachea), colder and drier air than normal enters the lungs which can cause lung crusting and infection. The primary cause for this is:

AKU Mock 1
Science Reasoning

In the diagram below, a 2 x 2 x 2 cube is made up of four transparent 1 x 1 x 1 cubes and four non-transparent black 1 x 1 x 1 cubes. They are placed in a way so that the entire big cube is nontransparent; i.e. looking at it from the front to the back, the right to the left, the top to the bottom, at no point you can look through the cube.

What is the minimum number of black 1 x 1 x 1 cubes needed to make a 3 x 3 x 3 cube nonetransparent in the same way?

AKU Practice Mock 3
Science Reasoning
A) 6
Show Explanation
B) 9
Show Explanation
C) 10
Show Explanation
D) 12
Show Explanation

During vertebrate development, the principle of induction is illustrated by:

AKU Mock 1
Science Reasoning

Unfertilized frog oocytes were bathed in a neutral, isotonic solution (Frog Ringer’s solution) to prevent changes in volume due to osmosis. The Frog Ringer’s solution was supplemented with radiolabeled amino acids. A sample of oocytes was taken every 30 minutes and assayed for radioactivity. At Time 1, the oocytes were fertilized. Samples were taken at five-minute intervals after fertilization and assayed for radioactivity. The results are presented in the graph below.

Based on the results of the experiment, the process most likely occurring after fertilization is

AKU Mock 1
Science Reasoning

A circle with radius 1 rolls along a straight line from point K to point L, as shown, with KL = 11π In which position is the circle when it has arrived in L?

AKU Practice Mock 1
Science Reasoning
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation

When Hamza wears his new shirt properly as shown on the left, the horizontal stripes form seven closed rings around his waist. This morning he buttoned his shirt wrongly, as shown on the right.

How many closed rings were there around Hamza’s waist this morning?

AKU Practice Mock 1
Science Reasoning
A) 0
Show Explanation
B) 2
Show Explanation
C) 4
Show Explanation
D) 6
Show Explanation

Organic compounds are molecules that frequently contain carbon, hydrogen, and oxygen joined together by covalent bonds.

As the number of bonds to oxygen atoms increases in a carbon chain, the overall molecule is increasingly oxidized. For example, aldehydes are more oxidized than alcohols, which are more oxidized than alkanes as shown in Table 1.

The melting points and viscosities of these compounds are listed in Table 2 and Table 3 respectively.

According to Table 3, how do the different types of 5-carbon molecules differ with respect to their viscosity?

AKU Practice Mock 2
Science Reasoning
A) The alkane has a higher viscosity than the aldehyde, and the aldehyde has a higher viscosity than the alcohol.
Show Explanation
B) The alkane has a higher viscosity than the alcohol, and the alcohol has a higher viscosity than the aldehyde.
Show Explanation
C) The alcohol has a higher viscosity than the alkene, and the alkene has a higher viscosity than the aldehyde.
The alcohol has a higher viscosity than the alkane, and the alkane has a higher viscosity than the aldehyde.

Show Explanation
D) The alcohol has a higher viscosity than the alkane and the alkane has a higher viscosity than the aldehyde.
Show Explanation

There are various ways to fold your arms: right in front of left or left in front of right, right hand tucked in or not, and left hand tucked in or not.

How many people with their arms folded do there need to be in a photograph to ensure that at least two people are folding their arms in the same way?

AKU Practice Mock 2
Science Reasoning
A) 4
Show Explanation
B) 7
Show Explanation
C) 8
Show Explanation
D) 9
Show Explanation

Aortic stenosis is a heart valve disorder in which the aortic semi-lunar valve opening is narrow.

Which effect could aortic stenosis have on the heart structure and function?

AKU Practice Mock 1
Science Reasoning
A) The tendons of the heart valves are weakened by blood being forced back through the bicuspid/left atrio-ventricular valve into the left atrium
Show Explanation
B) The cardiac muscle of the left ventricle wall is thinned by blood leaking out of the left ventricle during ventricular diastole
Show Explanation
C) There is less cardiac muscle in the left ventricle and reduced diastolic blood pressure, caused by the smaller blood volume entering the left atrium
Show Explanation
D) The wall of the left ventricle thickens, leading to an enlarged heart and inability to relax and fill completely during diastole
Show Explanation

Harris finishes a race in front of Malik. Samad finishes the race after Faiz, Malik in front of Faiz and Jibran in front of Samad. Who finishes the race last?

AKU Practice Mock 3
Science Reasoning
A) Samad
Show Explanation
B) Malik
Show Explanation
C) Harris
Show Explanation
D) Jibran
Show Explanation

A volunteer was injected intravenously with several test substances to determine the effect of each substance on normal body variables. The results are shown in Table 1.

Under what conditions might substance D be released normally?

AKU Mock 1
Science Reasoning

There are six friends sitting in a circle and facing away from the center of the circle.
Ahmed is between Ali and Saalaar.
Salal is sitting between Abdullah and Ibrahim.
Ali and Abdullah are sitting opposite to each other.

Who is to the right of Ali?

AKU Practice Mock 1
Science Reasoning
A) Ahmed
Show Explanation
B) Ibrahim
Show Explanation
C) Salal
Show Explanation
D) Abdullah
Show Explanation

Epidemiology is the study of diseases in populations of humans or other animals, specifically how, when and where they occur.

Epidemiologists attempt to determine what factors are associated with diseases (risk factors), and what factors may protect people or animals against disease (protective factors). The science of epidemiology was first developed to discover and understand possible causes of contagious diseases like smallpox, typhoid and polio among humans. It has expanded to include the study of factors associated with non-transmissible diseases like cancer, and of poisonings caused by environmental agents.

Epidemiological studies can never prove causation; that is, it cannot prove that a specific risk factor actually causes the disease being studied. Epidemiological evidence can only show that this risk factor is associated (correlated) with a higher incidence of disease in the population exposed to that risk factor. The higher the correlation the more certain the association, but it cannot prove the causation.

Which statement is an example of epidemiological evidence linking smoking to lung cancer?

AKU Practice Mock 1
Science Reasoning
A) Chemical analysis of tar from cigarettes shows that it contains carcinogens
Show Explanation
B) Dogs made to inhale the smoke from cigarettes develop lung tumors
Show Explanation
C) The incidence of lung cancer increases in a population as more cigarettes are smoked
Show Explanation
D) When tar from cigarettes is rubbed onto the skin of mice, the mice develop skin tumors
Show Explanation

Which of the following factors affecting the reaction of Mg and H2O was studied in Experiment 1, but not in Experiments 2 or 3?

AKU Practice Mock 1
Science Reasoning
A) Reaction temperature
Show Explanation
B) Addition of NaCl
Show Explanation
C) Addition of Fe
Show Explanation
D) Surface area of Mg
Show Explanation

Six test tubes were set up. Two different solutions were added to each test tube as shown in the table. The temperature, pH, and all concentrations were optimal.

Which three mixtures would lead to the presence of amino acids in the test tube?

AKU Mock 1
Science Reasoning

Mughees colors in each of the eight circles in one of the colors red, yellow or blue. Two circles that are directly connected by a line are not allowed to be of the same color. Which two circles does Mughees definitely have to color in the same color?

AKU Practice Mock 3
Science Reasoning
A) 5 and 8
Show Explanation
B) 1 and 6
Show Explanation
C) 2 and 7
Show Explanation
D) 4 and 5
Show Explanation

A submarine uses sound of frequency 6000 Hz to locate obstructions ahead of it in the sea.

A pulse of this sound reflects off an object that is 750m in front of the submarine. The pulse returns to the submarine 1.00s after it is transmitted.
What is the wavelength of this sound in the sea water?

AKU Mock 1
Science Reasoning

The space probe Rosetta was designed to investigate a comet. The probe consisted of an orbiter and a lander. The orbiter had a mass of 170 kg and the lander had a mass of 100 kg. When the two parts separated, the lander was pushed towards the surface of the comet so that its change in velocity towards the comet was 3.0 m/s.

Assume that the orbiter and lander were an isolated system. The orbiter moved away from the comet during the separation. What was the change in the speed of the orbiter?

AKU Practice Mock 1
Science Reasoning
A) 1.8 m/s
Show Explanation
B) 2.3 m/s
Show Explanation
C) 3.0 m/s
Show Explanation
D) 5.1 m/s
Show Explanation

Refer to the diagram below of a biochemical pathway. Arrows represent reactions catalyzed by the indicated enzyme. Letters represent chemical compounds consumed or produced during the reactions.

If enzyme 3 can process compound C three times faster than enzyme 4 can process compound C, which of the following statements is TRUE?

AKU Mock 1
Science Reasoning

Anaya, Beenish, Faryal, Yasmin and Kubra meet at a party. Each pair who know each other shake hands exactly once. Anaya shakes hands only once, Beenish twice, Faryal three times and Yasmin four times. How many people does Kubra shake hands with?

AKU Practice Mock 1
Science Reasoning
A) 1
Show Explanation
B) 2
Show Explanation
C) 3
Show Explanation
D) 4
Show Explanation

What is the most advantageous difference between the ancestral primate skulls and the modern human skull?

AKU Mock 1
Science Reasoning

There are six friends sitting in a circle and facing away from the center of the circle.
Ahmed is between Ali and Saalaar.
Salal is sitting between Abdullah and Ibrahim.
Ali and Abdullah are sitting opposite to each other.

Who are neighbors of Abdullah?

AKU Practice Mock 1
Science Reasoning
A) Ahmed and Ali
Show Explanation
B) Salal and Ali
Show Explanation
C) Salal and Ibrahim
Show Explanation
D) Saalaar and Salal
Show Explanation

The diagram shows a fire ladder. For each section of the ladder except the final one, the cable passes from a fixed point at the bottom of the section, over a pulley and is attached to a point at the top of the next section. On the final section of the ladder, the cable is wound around the drive pulley.

When the drive pulley is turned clockwise, the ladder____________

AKU Practice Mock 1
Science Reasoning
A) Extends
Show Explanation
B) Closes up
Show Explanation
C) Becomes nearer to the vertical
Show Explanation
D) Becomes nearer to the horizontal
Show Explanation

Three different cell types were observed under the microscope. The observations are summarized in Table 1. The three cell types were grown in separate cultures with plenty of oxygen and nutrients available. Figure 1 shows their rates of growth. At Time 1, oxygen was no longer available to the cells.

Consider Figure 1. Which of the following statements best describes the reason for the difference between the curves for cell Type B and cell Type C?

AKU Mock 1
Science Reasoning

For the students to determine the force required to remove tape from a wrapping, which of the following attractive forces had to exceed the adhesive force between the tape and the wrapping?

AKU Practice Mock 3
Science Reasoning
A) The force between the clamp and the tape
Show Explanation
B) The force between the clamp and the paper or plastic wrapping
Show Explanation
C) The force between the Earth and the wrapping
Show Explanation
D) The force between the Earth and the tape
Show Explanation

Equal-sized potatoes were placed into test tubes containing equal volumes of different concentrations of sucrose solution and left for 30 minutes. All other variables were controlled.

After 30 minutes, the potato piece in one of the concentrations of sucrose solution had not changed in size.

What can be concluded from this result?

I. There is no net movement of water into or out of the potato.

II. The water potential of the potato is the same as the water potential of the sucrose solution.

III. The concentration of the sucrose solution in the potato is the same as the concentration of the sucrose solution.

AKU Practice Mock 2
Science Reasoning
A) I, II, and III.
Show Explanation
B) I and II only
Show Explanation
C) I and III only
Show Explanation
D) III only.
Show Explanation

Tahir wants to write a number in each of the nine cells of the figure shown. He wants the sum of the three numbers on each diameter to be 13 and the sum of the eight numbers on the circumference to be 40. What number has Tahir to write in the central cell?

AKU Practice Mock 1
Science Reasoning
A) 3
Show Explanation
B) 5
Show Explanation
C) 8
Show Explanation
D) 10
Show Explanation

Which of the following correctly identifies gas X and Y?

AKU Practice Mock 3
Science Reasoning
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation

The shape below is a Roman tile known as an Ostia.

AKU Practice Mock 2
Science Reasoning
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

A bar magnet is rotating at a constant rate of 120 revolutions per minute inside a circular coil of wire, causing an induced voltage across the coil. Which of the following statements is/are correct?

1. Increasing the number of turns of wire on the coil would increase both the maximum value and the frequency of the induced voltage.

2. The direction of the induced voltage in this coil reverses every 0.25 seconds.

3.There is always an induced current in a conductor which is experiencing a change in magnetic field.

AKU Mock 1
Science Reasoning

When the crane driver finishes for the day, he/she will ensure that

AKU Practice Mock 3
Science Reasoning
A) The counterbalance is adjacent to the cab
Show Explanation
B) The counterbalance is at a distance from the cab that compensates for the weight of the jib
Show Explanation
C) The counterbalance is removed from the jib
Show Explanation
D) A temporary load is hoisted to compensate to compensate for the counterbalance
Show Explanation

The piano is a large and versatile stringed musical instrument. The full name is ‘pianoforte’ meaning ‘soft-loud’.

The concert grand piano has a keyboard with 88 keys, each of which, when depressed, sets a mechanism in motion, resulting in a felt-covered hammer hitting strings and causing them to vibrate.

The pianist has control over whether notes are sounded loudly or softly depending on how hard he or she presses the key.

When the key is pressed, the lever body lifts and rotates, causing the jack to lift the hammer. When the jack hits the regulating rail (not shown), it rotates relative to the lever body and the hammer continues upwards without being pushed, hitting the string whilst moving freely.

A grand piano has three pedals; the left pedal moves the hammers relative to the strings so that the notes are played more softly; the right pedal lifts the dampers from all the strings; the center pedal causes any dampers that are already lifted by the player’s keystrokes to remain in the up position as long as the pedal is down.

The soundboard of the piano is a curved board that goes across the width of the piano under the strings. Its purpose is to

AKU Practice Mock 2
Science Reasoning
A) Amplify the sound of the piano.
Show Explanation
B) Stop the vibration of the piano.
Show Explanation
C) Hold the piano in shape.
Show Explanation
D) Provide damping so that the notes do not sound for too long.
Show Explanation

There are many clamps which tighten with a screw action, but to work on similar objects repetitively, it is much easier to use a ‘quick action clamp’. These may use a cam, as in the example shown below.

If the cam handle on the right is moved down and to the right (in the direction of the arrow),

AKU Practice Mock 3
Science Reasoning
A) The height of the pivot decreases and the clamp grips the object
Show Explanation
B) The height of the pivot decreases and the clamp releases the object
Show Explanation
C) The height of the pivot increases and the clamp grips the object
Show Explanation
D) The height of the pivot increases and the clamp releases the object
Show Explanation

Evolution of a bacterial population occurs much more rapidly than evolution of a human population. This is because:

AKU Mock 1
Science Reasoning

The family tree shows the inheritance of freckles.

The probability that the next child produced by parents 1 and 2, and the probability that the next child produced by parents 5 and 6 will have freckles respectively is

AKU Practice Mock 2
Science Reasoning
A) 0.5 and 0.75.
Show Explanation
B) 0.5 and 0.25.
Show Explanation
C) 1 and 0.5
Show Explanation
D) 1 and 0.75
Show Explanation

A lizard was placed in a chamber with a constant flow of air. The temperature of the chamber was varied between 25°C and 10 °C. Apart from temperature and time, all other variables were kept constant. The carbon dioxide concentrations in the air leaving the chamber are shown in the graph.

Which of the following statements is/are correct?

I. Between 25 °C and 10 °C the respiration rate of the lizard is inversely proportional to the environmental temperature.

II. The data demonstrates that the lizard is only respiring aerobically.

III. The carbon dioxide could be detected by passing the air leaving the chamber through limewater.

AKU Practice Mock 2
Science Reasoning
A) II and III only
Show Explanation
B) I only
Show Explanation
C) II only
Show Explanation
D) III only.
Show Explanation

The results of the 2 experiments support the conclusion that, for a given brand of tape, as the tape’s width increases, the force required to remove the tape from a given wrapping:

AKU Practice Mock 3
Science Reasoning
A) Increases only
Show Explanation
B) Decreases only
Show Explanation
C) Remains constant
Show Explanation
D) Varies, but with no particular trend
Show Explanation

Scientists discover two hypothetical species of freshwater fish living in small pools that are connected by streams during the rainy season but isolated from each other during the dry season. Species A reproduces asexually. Species B reproduces sexually. Both species are susceptible to a parasitic worm that causes a condition called “Black Spot Disease.”

Scientists identified a pool in which both species of fish lived but in which no parasite existed. After taking an initial survey of both
populations, scientists then intentionally infected the pool with the parasite that causes Black Spot Disease. Three years later they returned and resampled the populations of the two species of fish in the pool. Their results are represented in the graph below.

Which of the following statements are best supported by the results of this experiment?

AKU Practice Mock 1
Science Reasoning
A) Species B can reproduce faster and out-compete species A for food and other resources
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B) Species B is a predator of species A except when species A is infected by a parasite
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C) Species A is partially protected from the effects of the parasite by the presence of species B
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D) Species A is more susceptible to the effects of the parasite due to its lack of genetic diversity
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A human cell containing 22 autosomes and a Y chromosome is probably a:

AKU Mock 1
Science Reasoning

Ayesha wants to spend 18 consecutive days visiting her Grandma. Her Grandma reads her story books on story days Tuesday, Saturday and Sunday. Ayesha wants to spend as many story days with her Grandma as possible. On which day of the week should she start her visit?

AKU Practice Mock 1
Science Reasoning
A) Tuesday
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B) Friday
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C) Saturday
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D) Sunday
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The compounds BrCl and BrI melt at –66°C and 42°C, respectively.

What is the best explanation for this difference in melting points?

AKU Mock 1
Science Reasoning

If only one X chromosome is found in a female person, which of the following symptoms will she show?

AKU Mock 1
Science Reasoning

Six persons Ali, Bilal, Omaima, Deewan, Eisha and Farah are sitting in two rows, three in each.

Eisha is not at the end of any row.

Deewan is second to the left of Farah.

Omaima (the neighbor of Eisha) is sitting diagonally opposite to Deewan.

Bilal is the neighbor of Farah.

Which of the following are sitting diagonally opposite to each other?

AKU Practice Mock 2
Science Reasoning
A) Farah and Omaima
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B) Ali and Omaima
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C) Deewan and Ali.
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D) Ali and Farah.
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Below are three views of the same object.

Which of the following is another view of the object?

AKU Practice Mock 3
Science Reasoning
A) A
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B) B
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C) C
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D) D
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Six persons Ali, Bilal, Omaima, Deewan, Eisha and Farah are sitting in two rows, three in each.

Eisha is not at the end of any row.

Deewan is second to the left of Farah.

Omaima (the neighbor of Eisha) is sitting diagonally opposite to Deewan.

Bilal is the neighbor of Farah.

Which of the following is one of the two rows?

AKU Practice Mock 2
Science Reasoning
A) Farah, Bilal and Omaima
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B) Farah, Bilal and Omaim
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C) Deewan, Bilal and Farah
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D) Ali, Eisha and Farah
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An investigator went to Central America to study oropendulas, which are communal nesting birds. Another species of bird, the cowbird, sometimes lay its eggs in the nests of oropendulas. Some of the populations of oropendulas throw the cowbird eggs out of the nest, and some don’t. The investigator was interested in finding out why some birds would raise other species as their own but others would toss them out. By watching the nests closely, he found that blowflies lay their eggs in the nests of oropendulas, and that the young larvae, maggots, feed on the young birds. If young cowbirds are in the nest, the precocious cowbirds eat the blowfly larvae, protecting the young oropendulas. In colonies of oropendulas that discriminate against cowbirds, throwing them from the nest, the blowflies are not eaten by cowbirds. These colonies of oropendulas build their nests close to a particular wasp colony, and the wasps eat the blowflies.

Which of the following rows is correct?

AKU Practice Mock 3
Science Reasoning
A) A
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B) B
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C) C
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D) D
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There are six friends sitting in a circle and facing away from the center of the circle.
Ahmed is between Ali and Saalaar.
Salal is sitting between Abdullah and Ibrahim.
Ali and Abdullah are sitting opposite to each other.

Who is opposite to Ahmed?

AKU Practice Mock 1
Science Reasoning
A) Ali
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B) Ibrahim
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C) Salal
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D) Abdullah
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Jamshed reads a book whose pages are all numbered. The digit 0 appears five times and the digit 8 six times. What is the page number of the last page?

AKU Practice Mock 3
Science Reasoning
A) 48
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B) 58
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C) 60
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D) 68
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The piano is a large and versatile stringed musical instrument. The full name is ‘pianoforte’ meaning ‘soft-loud’.

The concert grand piano has a keyboard with 88 keys, each of which, when depressed, sets a mechanism in motion, resulting in a felt-covered hammer hitting strings and causing them to vibrate.

The pianist has control over whether notes are sounded loudly or softly depending on how hard he or she presses the key.

When the key is pressed, the lever body lifts and rotates, causing the jack to lift the hammer. When the jack hits the regulating rail (not shown), it rotates relative to the lever body and the hammer continues upwards without being pushed, hitting the string whilst moving freely.

A grand piano has three pedals; the left pedal moves the hammers relative to the strings so that the notes are played more softly; the right pedal lifts the dampers from all the strings; the center pedal causes any dampers that are already lifted by the player’s keystrokes to remain in the up position as long as the pedal is down.

Each of the piano strings has a damper on it (Figure 2), which is lifted when the piano key is played. The purpose of the damper is to

AKU Practice Mock 2
Science Reasoning
A) Make the strings vibrate longer
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B) Change the frequency of the vibrations of the strings.
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C) Stop the strings from vibrating.
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D) Prevent damage to the strings.
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Three different cell types were observed under the microscope. The observations are summarized in Table 1. The three cell types were grown in separate cultures with plenty of oxygen and nutrients available. Figure 1 shows their rates of growth. At Time 1, oxygen was no longer available to the cells.

Which of the following equations is cell Type C able to carry out?

I. Glucose + Oxygen → Carbon Dioxide + Water + ATP

II. Water + Light → Oxygen + ATP + NADPH

III. Carbon Dioxide + Water + ATP + NADPH → Glucose

AKU Mock 1
Science Reasoning

Several processes can change the proportion of gases in the atmosphere by adding or removing carbon dioxide or oxygen. Which row is correct?

AKU Mock 1
Science Reasoning

Organic compounds are molecules that frequently contain carbon, hydrogen, and oxygen joined together by covalent bonds.

As the number of bonds to oxygen atoms increases in a carbon chain, the overall molecule is increasingly oxidized. For example, aldehydes are more oxidized than alcohols, which are more oxidized than alkanes as shown in Table 1.

The melting points and viscosities of these compounds are listed in Table 2 and Table 3 respectively.

For each type of organic compound, what is the relationship between the length of the carbon chain to the melting point and viscosity? As the number of carbons in the chain increases, the melting point:

AKU Practice Mock 2
Science Reasoning
A) Decreases, and the viscosity decreases.
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B) increases, and the viscosity increases.
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C) Increases, but the viscosity decreases.
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D) Increases but the viscosity decreases.
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Six persons Ali, Bilal, Omaima, Deewan, Eisha and Farah are sitting in two rows, three in each.

Eisha is not at the end of any row.

Deewan is second to the left of Farah.

Omaima (the neighbor of Eisha) is sitting diagonally opposite to Deewan.

Bilal is the neighbor of Farah.

After interchanging seat with Eisha, who will be the neighbors of Deewan in the new position?

AKU Practice Mock 2
Science Reasoning
A) Omaima and Ali
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B) Farah and Bilal
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C) Only Ali
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D) Only Omaima
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The students’ instructor gave them a strip of tape that was 2.5 cm wide and asked them to identify the brand. The students repeated the procedures from Experiments 1 and 2 using the tape and obtained average forces of 4.9 N for paper and 4.1 N for plastic. Which of the following brands would most likely have produced these results?

AKU Practice Mock 3
Science Reasoning
A) Brand X only
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B) Brand Y only
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C) Brands X and Y only
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D) Brands Y and Z only
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Based on the results of Experiment 3, one can reasonably conclude that as the amount of NaCl added increased from 0 mol to 0.100 mol, the maximum rise in temperature within 15 min of the start of the reaction

AKU Practice Mock 1
Science Reasoning
A) Increased only
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B) Increased then stayed the same
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C) Decreased only
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D) Decreased, then stayed the same
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If methylene blue dye is added to a suspension of yeast cells, living cells do not take up the stain, and they remain colorless. However, dead cells are stained blue. This fact was used to carry out an investigation into the rate at which yeast cells were killed at two different temperatures (at high temperatures the yeast enzymes will be denatured). The results are shown in the diagram below.

AKU Practice Mock 3
Science Reasoning
A) A
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B) B
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C) C
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D) D
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