# UHS MDCAT Past Paper 2013

UHS MDCAT Past Paper MCQs 2013

Q.3 Ratio of moment of inertia of two objects ‘A’ and ‘B’ is 2:3. Which one of the following is the ratio of torques of ‘A’ and ‘B’ respectively, if both are being rotated with constant angular acceleration?
A) 3:4 C) 3:2
B) 2:3 D) 4:3

Q.4 Due to some mechanical fault, a lift falls freely from the top of a multistory building. Which of the followings is the apparent weight of a man inside the lift, if mass of man is 80 kg while value of ‘g’ is 10 ms-2?
A) 900 N C) 800 N
B) Zero D) 700 N

Q.5 Stokes’ Law is given as:
A) F = 6πηr2v C) F = 6πηrv-1
B) F = 6πηrv D) F = 6π2ηr3v

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Q.6 The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe:
A) Remains constant C) Exponentially increases
B) Is zero D) Exponentially decreases

Q.7 A small leak is developed in a large water storage tank. If the height of water above leakage is 10 m, then find the speed of efflux through the leak:
A) 14 m/sec C) 9.8 m/sec
B) 10 m/sec D) 20 m/sec

Q.8 The minimum distance from the eye at which an object can be seen clearly without strain is called:
A) Focal point C) Yield point
B) Near point D) Far point

Q.9 In the diffraction of light around an obstacle, the angle of diffraction is increased then:
A) The wavelength of incident light wave is increased C) The amplitude of the incident light wave is increased
B) The wavelength of incident light wave is decreased D) The amplitude of the incident light wave is decreased

Q.10 An object 15 cm from a lens produces a real image 30 cm from the lens. What is the focal length of the lens?
A) +15 cm C) +10 cm
B) +20 cm D) +25 cm

Q.11 What is the formula for critical angle in case of light through two mediums having refractive indexes n1 and n2 such that n1 > n2?

Q.15 Variation of amplitude with respect to time for an oscillation object is shown in figure.

Identify the oscillation:
A) Damped C) Undamped
B) Critical D) Heavily damped

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Q.16 A 4.0 m long wire is subjected to stretching force and its length increases by 40 cm. The percent elongation which the wire undergoes is:
A) 0.10 % C) 10 %
B) 40 % D) 20 %

Q.17 What is the value of universal gas constant?
A) 8314 Jmol-1K-1 C) 831.4 Jmol-1K-1
B) 83.14 Jmol-1K-2 D) 8.314 Jmol-1K-2

Q.18 A gas sample contains three molecules each having speed 1 ms-1, 2 ms-1, 3 ms-1. What is the mean square speed?
A) 14/3 m/s C) 2 m/s
B) 6 m/s D) √14/3 m/s
Q.19 What is the factor upon which change in internal energy of an ideal gas depends?
A) Change in volume C) Change in temperature
B) Change in temperature and volume D) Path followed to change internal energy

Q.20 What will be the mathematical form of first law of thermodynamics for a system whose variation of volume by pressure is shown?

Q.24 12-volt battery is applied across 6-ohm resistance to have a steady flow of current. What must be the required potential difference across the same resistance to have a steady current of one ampere?
A) 12 V C) 1 V
B) 6 V D) 3 V

Q.25 A solenoid is cut into two halves. Magnetic induction due to same current in each half will be:
A) Half of the original C) Same as original
B) Double of the original D) Four times of the original

Q.26 A long straight current carrying conductor has current directed from bottom to top when held vertically. What will be the direction of magnetic field lines when observed from below the conductor?
A) Clockwise C) Vertically upward
B) Anti clockwise D) Vertically downward

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Q.27 What is the output Boolean expression of logic diagram shown in figure below:

A) (̅A̅ ̅+̅ ̅B̅).(̅A̅ ̅+̅ ̅B̅) C) A̅.B̅ + A̅.B̅

B) (A̅ + B̅)(A̅ + B̅) D)

̅B̅ +

̅B̅

Q.28 Three resistors each having value ‘R’ are connected as shown in figure. What is the equivalence resistance between ‘X’ and ‘Y’?
A) R C) 3R
B) R/3 D) R3

Q.29 The diagram shows a wire, carrying a current ‘I’, placed between the poles of magnet: In which direction does the force on the wire act?
A) Towards the ‘N’ pole of the magnet C) Upwards
B) Downwards D) Towards the ‘S’ pole of the magnet

Q.30 X-rays from a given X-ray tube operating under specified conditions have a minimum wavelength. The value of this minimum wavelength could be reduced by:
A) Cooling the target C) Increasing the potential difference between the cathode and the target
B) Reducing the temperature of the filament D) Reducing the pressure in the tube

Q.31 Helium-neon lasers are used for the:
A) Precise measurement of range finding C) Surveying for construction of tunnels
B) Optical fiber communication systems D) Welding detached bone of body

Q.32 What is the type of characteristic X-ray photon whose energy is given by relation ‘hf = EM – EK’?
A) K – alpha C) K – beta
B) M – alpha D) M – beta

Q.33 Kinetic energy of electrons by applying potential difference V1 across the x-ray tube is KE1 while V2 potential difference produce kinetic energy equal to KE2. What will be the value of KE1:KE2 if ratio of potential difference V1:V2 = 2:3?
A) 3:2 C) 9:4
B) 4:9 D) 2:3

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Q.34 What will be the relation for the speed of electron accelerated towards the target in X-ray tube by applying potential difference ‘V’, take mass of electron ‘m’ and charge on electron ‘e’?

A) v = √2Ve
m

B) v = √2me
V

C) v = √2V
me

D) v = √2meV

Q.35 For what CAT stands in X-ray technology?
A) Capacitor Amplifier Transistor C) Cathode Anode Technique
B) Computerized Axial Tomography D) Current Amplification Technology

Q.36 During the production of LASER, when the excited state E2 contains more number of atoms than the ground state E1, the state is known as:
A) Population inversion C) Excited state
B) Ground State D) Metastable state

Q.37 In cloud chamber the path of β-particles is:
A) Straight, thick, short C) Thin, wavy, longer
B) Thin, wavy, shorter D) Thin, straight, short

Q.38 Among the three types of radioactive radiation, which have strongest penetration power?
A) Alpha C) Beta
B) Gamma D) All have same penetration power

Q.39 Emission of alpha decay from a radioactive substance causes:
A) Decreases in ‘Z’ by 4 and decreases in ‘A’ by 2 C) Decreases in ‘Z’ by 1 and ‘A’ remains same
B) Decreases in ‘A’ by 1 and ‘Z’ remains same D) Decreases in ‘A’ by 4 and decreases in ‘Z’ by 2

Q.40 10 Joule of energy is absorbed by 10-gram mass from a radioactive source. What is the absorbed dose?
A) 1 gray C) 10 gray
B) 1000 gray D) 100 gray

Q.41 Isotopes are those nuclei of an element that have:
A) Same mass number but different atomic number C) Different mass number as well as atomic number
B) Same mass number as well as atomic number D) same atomic number but different mass number

Q.42 Which one of the following emission takes place in a nuclear reaction?
90Th234 91Pa232 +
A) Alpha C) Beta
B) Gamma D) Photons

A) Dependent on both temperature and pressure C) Independent of both temperature and Pressure
B) Independent of temperature but dependent on D) Independent of pressure but dependent on pressure temperature

Q.44 In a simple harmonic motion with a radius ‘xo’, the velocity of the particle at any point is:
A) v = ω√xo2 − x2 C) v = ω√(xo − x)

B) v = ω(x2 − xo2) D) v = ω√(x − xo)
CHEMISTRY

Q.45 Hydrogen burns in chlorine to produce hydrogen chloride. The ratio of masses of reactants in chemical reaction is:
H2 + Cl2 2HCl
A) 1:35.5 C) 1:71
B) 2:35.5 D) 2:70

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Q.46 A sample of Neon is found to exist as 20Ne, 21Ne, 22Ne. Mass spectrum of ‘Ne’ is as follow:

What is the relative atomic mass (A, value) of Neon?
A) 20.18 C) 20.10
B) 20.28 D) 20.22

Q.47 The coordination number of Na+ in NaCl crystal is:
A) 6 C) 4
B) 2 D) 8

Q.48 There are four gases H2, He, N2 and CO2 at 0 °C. Which gas shows greater non-ideal behavior?

A) -394 kJ/mole C) -294 kJ/mole
B) +394 kJ/mole D) -390 kJ/mole

Q.54 Reactants have high energy than products in:
A) Exothermic reactions C) Photochemical reactions
B) Endothermic reactions D) Non-spontaneous reactions

Q.55 If 18.0 g of glucose is dissolved in 1 kg of water, boiling point of this solution should be:
A) 100.52 °C C) 100.052 °C
B) 100.00 °C D) Less than 100 °C

Q.56 Molal freezing point constant of water is:
A) 1.86 C) 11.86
B) 2.86 D) 0.52

Q.57 In the figure given below, the electron flow in external circuit is from:

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A) Copper to zinc electrode C) Porous partition to zinc electrode
B) Right to left D) Zinc to copper electrode

1
Q.58 By considering Arrhenius equation, the graph between ‘T’ and ‘log K’ given a curve of the type:

Q.59 Which one of the following is a redox reaction?
A) NaCl + AgNO3 NaNO3 + AgCl2 C) 2Na + Cl2 2NaCl
B) 2Cl― Cl2 + 2e― D) Na+ + 1e― Na

Q.60 The chemical substance, when dissolved in water, gives “H+” is called:
A) Acid C) Amphoteric
B) Base D) Neutral

Q.61 The ‘pH’ of our blood is:
A) 6.7 – 8 C) 7.5
B) 7.9 D) 7.35 – 7.4

Q.62 In zero order reactions, the rate is independent of:
A) Concentration of the product C) Temperature of the reaction
B) Concentration of the reactant D) Surface area of the product

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Q.63 What is the trend of melting and boiling point of the elements of short periods as we move from left to right in a periodic table?
A) Melting and boiling points first decrease then C) Melting and boiling points first increase then increase decrease
B) Melting and boiling points increase gradually D) Melting and boiling points decrease gradually

A) Increase in number of electrons in valence shells C) Decrease in number of shells
B) Increase in number of protons in the nucleus D) Increase in number of shells

Q.65 Alkaline earth metal oxides react with water to give hydroxides. The solubility of alkaline earth metal oxides in water increases as we move from top to bottom in a group. Which of the following alkaline earth metal oxides is least soluble in water?
A) MgO C) BaO
B) CaO D) SrO

Q.66 The electronic structure of carbon monoxide is represented as:

A) C)

B) D)

Q.67 Which one pair has the same oxidation state of ‘Fe’?
A) FeSO4 and FeCl3 C) FeSO4 and FeCl2
B) FeCl2 and FeCl3 D) Fe2(SO4)3 and FeSO4

Q.68 Oxidation state of ‘Fe’ in K3[Fe(CN)6] is:
A) +2 C) -6
B) +3 D) -3

Q.69 The nature of an aqueous solution of ammonia (NH3) is:
A) Amphoteric C) Acidic
B) Neutral D) Basic

Q.70 Unpolluted rain water has a pH of:
A) 4.9 C) 5.3
B) 5.6 D) 7.0

Q.71 In comparison with oxygen gas, a strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:
A) Highly reactive gas C) Moderately reactive gas
B) Completely inert like noble gases D) Very less reactive gas

Q.72 The catalyst used in the Haber’s process is:
A) Magnesium oxide C) Silicon oxide
B) Aluminium oxide D) Iron crystals with metal oxide promoters

Q.73 The cis-isomerism is shown by:

H3C

A) H
H3C

H
C C
CH3
CH3
C C

H

C) H3C
H

H
C C
CH3
H
C C

B) H3C

H D) H

CH3

Q.74 Select the nucleophile from the following examples:
A) NO2 C) NO2+
B) NH3 D) N+H4

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Q.75 The introduction of an alkyl group in benzene takes place in the presence of AlCl3 and:
O O

A) R

B) R

C OH

Cl

C) R

D) R

C Cl
O

C O-

Q.76 What is the product formed when propene reacts with HBr?
H2C

CH CH3

A) H3C

CH2 CH2Br C)

Br
H3C

Br
CH CH3

B) BrH2C CH CH2Br D) Br

Q.77 The order of reactivity of alkyl halides towards nucleophile is:
A) RI > RBr > RF > RCl C) RF > RCl > RBr > RI
B) RI > RBr > RCl > RF D) RF > RBr > RCl > RI

Q.78 Consider the reaction given below:

H3C

CH2 CH2 CH2Br

H3C

CH2 CH2 CH2OH

Which statement is true?

H3C

CH2 CH CH2

A) Reagent for I is KOH in alcohol C) Reaction I is Debromination
B) Reagent for II is KOH in aqueous medium D) Reaction II is elimination

Q.79 Consider the following reaction:
C2H5OH + PCl5 ?
What product(s) may be formed?
A) C2H5Cl only C) C2H5Cl, POCl3 and HCl
B) C2H5Cl and HCl D) C2H5Cl and POCl3
OH
NO 2 NO 2

Q.80 is named as:

NO 2
A) Picric acid C) Benzoic acid
B) Nitro phenol D) Malonic acid

Q.81 Which group gives a yellow precipitate of triiodo methane when warmed with alkaline aqueous iodine?
O

A) An amide group, H3C

C NH2 C) A primary Alcohol group as in Propanol
CH3 CH2 CH2 OH
O O

B) Ethyl Ketone group, C2H5 C R D) Methyl Ketone group, CH3 C R

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Q.82 Aqueous phenol decolorizes bromine water to form a white precipitate. What is the structure of the white precipitate formed?
OH OH

Br Br

A) Br C) Br
OH Br

Br

B) D) Br Br

Q.83 The relative strength of carboxylic acid, water, ethanol and phenol has the following order of increasing acid strength:
A) Carboxylic Acid > Phenol > Ethanol > Water C) Phenol > Carboxylic Acid > Ethanol > Water
B) Carboxylic Acid > Phenol > Water > Ethanol D) Water > Ethanol > Phenol > Carboxylic Acid

B) CH3 C CH3 D) CH3 C Cl

Q.86 The formation of ester from acetic acid in presence of acid and ethanol is a:
A) Nucleophilic substitution reaction C) Electrophilic substitution reaction

Q.87 Methyl cyanides, on boiling with mineral acids or alkalis yield:
A) Acetic acid C) Propanoic acid
B) Formic acid D) Butanoic acid

Q.88 The amino acids which largely exist in dipolar ionic form are:
A) Acidic amino acids C) Beta amino acids
B) Basic amino acids D) Alpha amino acids

O

Q.89 CH3 C

OH + NH3 heat ?

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The final products formed are:
O O

A) CH3 C
O

B) CH3 C

NH2 + CO2 C) CH3 C
O

NH2+ H2O D) CH3 C

NH2 + H2

NH2 + HCl

Q.90 The reaction:
O

H H O

H2N

CH C OH

H

• H N C C OH
H

Gives a product called dipeptide molecule represented by:

O H H O

H H O

H2N

CH C O N

C C OH

H2N

CH2 C O N

C C OH

N+H4 CH CO2-
B) R D)

N+H2 CH COO- R

Q.94 What is the name of amino acid,

H2N

H

C COOH
R where ‘R’ is CH3 group?

A) Glycine C) Aspartic acid
B) Lysine D) Alanine

Q.95 Polyvinyl acetate (PVA) is colourless and non-toxic resin used as an adhesive and as a binder for making:
A) Toys C) Compact discs
B) Gramophone recorders D) Emulsion pains

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Q.96 Both ribose and deoxyribose are monosaccharides containing carbon atoms.
A) Four C) Five
B) Six D) Seven

Q.97 The increased quantities of cholesterol in blood make plaque like deposits in the arteries causing:
A) Cholera C) Heart attack
B) Down’s syndrome D) Phenylketonuria

Q.98 Polyvinyl chloride is an example of:
A) Condensation polymer C) Biopolymer
B) Addition polymer D) Thermosetting polymer

Q.99 Collagen is a fibrous protein present most abundantly in:
A) Hair C) Tendons
B) Nail D) Arteries

Q.100 Animals store glucose in the form of glycogen in:
A) Stomach C) Liver and muscles
B) Mouth D) Small intestine

Q.101 Aerobic decomposition of organic matter i.e. glucose by bacteria in water sediments produces:
A) Propene C) Methane
B) Ethane D) Butane

SPOT THE ERROR: In the following sentences, some segments of each sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected. Fill the Circle corresponding to that letter under the segment in the MCQ Response From.

Q.107 Amjad was not conscious to the aberration he had committed in the public meeting. It was disliked
A) B) C)
by all and sundry. D)

Q.108 Late Agha Shahi was an outstanding genius in the international affairs. He was gifted of the acumen
A) B)
to judge the future events, judge the future events in advance.
C) D)

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Q.109 The old man was sitting quite bamboozled when the swindler deprived him from his pension money
A) B)
by his evil tricks.
C) D)

Q.110 The prime minister fired a broadside at the opposition leaders. A few of his remarks were not up at the mark.
A) B) C) D)

Q.111 Lucy is the diva which performance as an opera singer is peerless.
A) B) C) D)

Q.112 The police report exonerated Anwar of all charges of corruption and job was also restored
A) B) C) D)

In each of the following question, four alternative sentences are given. Choose the CORRECT one and fill the Circle corresponding to that letter in the MCQ Response Form.

Q.113
A) We should pay maximum accolade for our national heroes.
B) We should pay maximum accolade in our national heroes.
C) We should pay maximum accolade to our national heroes.
D) We should pay maximum accolade from our national heroes.

Q.114
A) Does any bodys knows why the latitudes close to the equator are called the horse latitudes?
B) Do any body knows why the latitudes close to the equator are called the horse latitudes?
C) Does any body knows why the latitudes close to the equator are called the horse latitudes?
D) Does any body know why the latitudes close to the equator are called the horse latitudes?

Q.115
A) Shelley is consider to be an idealist poet. C) Shelley is considers to be an idealist poet.
B) Shelley is considering to be an idealist poet. D) Shelley is considered to be an idealist poet.

Q.116
A) Pakistan cricket team forged an impregnable lead.
B) Pakistan cricket team forged the impregnable lead.
C) Pakistan cricket team forged against impregnable lead.
D) Pakistan cricket team forged on impregnable lead.

Q.117
A) A person which job involves calculating insurance risks and payments for insurance companies by studying how frequently fires, accidents, death etc. happen is called an actuary.
B) A person who job involves calculating insurance risks and payments for insurance companies by studying how frequently fires, accidents, death etc. happen is called an actuary.
C) A person whose job involves calculating insurance risks and payments for insurance companies by studying how frequently fires, accidents, death etc. happen is called an actuary.
D) A person whose job involves calculating insurance risks and payments for insurance companies by studying how frequently fires, accidents, death etc. happen are called an actuary.

Q.118
A) His addled brain refuse to think clearly and solve the problem.
B) His addle brain refused to think clearly and solve the problem.
C) His addle brain refuse to think clearly and solve the problem.
D) His addled brain refused to think clearly and solve the problem.

Q.119
A) The children had bloomed while their stay on the farm.
B) The children had bloomed during their stay on the farm.
C) The children had bloomed on their stay on the farm.
D) The children was bloomed while their stay on the farm.

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Q.120
B) I should have business acumen. D) I should may have been business acumen.

Q.121
A) No one is casting aspersions to you. C) No one is casting aspersions on you.
B) No one is casting aspersions at you. D) No one is casting aspersions with you.

Q.122
A) This is one of the bifurcated road. C) This is one of them bifurcated road
B) This is one of the bifurcated roads. D) This is one off the bifurcated road.

In each of the following question, four alternative meanings of a word are given. You have to select the NEAREST CORRECT MEANING of the given word and fill the appropriate Circle on the MCQ Response Form.

Q.123 HEINOUS
A) Heroic C) Odious
B) Humorous D) Hone

Q.124 ILLICIT
A) Intimate C) Illegal
B) Licentious D) Limited

Q.125 MOTIF
A) Tough C) Motion
B) Stuff D) Design

Q.126 INCULCATE
A) Calculate C) Instigate
B) Instill D) Stimulate

Q.127 INIQUITY
A) Inequality C) Wickedness
B) Injustice D) Efficiency

Q.128 INTRANSIGENT
B) Inflexible D) Spirited

Q.129 LAMPOON
A) Irk C) Lacerate
B) Gratification D) Ridicule

Q.130 MESMERIZE
A) Objectify C) Amalgamate
B) Modify D) Fascinate

Q.131 OBLITERATE
A) Sanctify C) Annihilate
B) Obscure D) Oplate

Q.132 MALEVOLENCE
A) Empathy C) Hostility
B) Maligning D) Management

BIOLOGY

Q.133 The simplest independent unit of life is known as:
A) Bacterial colony C) Chloroplast
B) Cell D) DNA

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Q.134 The process by which unwanted structures within the cell are engulfed and digested within the lysosome is known as:
A) Endocytosis C) Hydrolysis
B) Exocytosis D) Autophagy

Q.135 The plants having foreign DNA incorporated into their cells are called:
A) Clonal plants C) Biotech plants
B) Transgenic plants D) Tissue cultured plants

Q.136 Pasteurization technique is widely used for preservation of:
A) Water C) Milk products
B) Heat D) Vaccines

Q.137 The production of genetically identical copies of organisms by asexual reproduction is called:
A) Genetic engineering C) Hydroponic culture technique
B) Integrated disease management D) Cloning

Q.138 The model of plasma membrane suggests that proteins are embedded in lipid bilayer:
A) Unit membrane C) Permeable
B) Fluid mosaic D) Ultracentrifuge

Q.139 The function of nucleolus is to make:
A) rDNA C) RNA
B) Ribosomes D) Chromosomes

A) Golgi apparatus C) Lysozymes
B) Endoplasmic Reticulum D) Peroxisomes

Q.146 Down’s syndrome is a result of non-disjunction of _ pair of chromosomes that fails to segregate:
A) 21st C) 18th
B) 22nd D) 24th

Q.147 is most abundant carbohydrate in nature.
A) Waxes C) Starch
B) Glycerol D) Cellulose

Q.148 Which of the following is a keto sugar:
A) Glyceraldehyde C) Ribose
B) Dihydroxy-acetone D) Glucose

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Q.149 Amino acid in which the R-group is hydrogen is:
A) Glycine C) Leucine
B) Alanine D) Valine

Q.150 Acyl-glycerols like fats and oils are esters formed by condensation reaction between:
A) Fatty acids and water C) Fatty acids and glucose
B) Fatty acids and alcohols D) Fatty acids and phosphates

Q.151 Which of the following is purine:
A) Guanine C) Thymine
B) Cytosine D) Uracil

Q.152 If the co-factor is covalently or tightly and permanently bonded to enzyme then it will be called:
A) Coenzyme C) Activator
B) Prosthetic group D) Apoenzyme

Q.153 Optimum pH value for the working of pancreatic lipase is:
A) 4.50 C) 2.00
B) 7.60 D) 9.00

Q.154 The view that active site of an enzyme is flexible and when a substrate combines with it, cause changes in enzyme structure is known as:
A) Lock & key model C) Sliding filament model
B) Induce fit model D) Specificity model

Q.160 When beef which is not properly cooked is consumed by humans, they become infected by:
A) Tape worm C) Pin worm
B) Hook worm D) Round worm

Q.161 Sleeping sickness in humans is caused by:
A) Trypanosoma C) Anopheles
B) Plasmodium D) Andes

Q.162 Schistosoma is a parasite that lives in the of the host.
A) Intestine C) Liver
B) Kidney D) Blood

Q.163 The cavity between body wall and alimentary canal is:
A) Coelom C) Endoderm
B) Mesoderm D) Mesoglea

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Q.164 The layer which forms the lining of digestive tract and glands of digestive system is:
A) Ectoderm C) Endoderm
B) Mesoderm D) Mesoglea

Q.165 Which one of the following vitamins is produced by microflora of large intestine?
A) Vitamin K C) Vitamin A
B) Vitamin C D) Vitamin D

Q.166 is activated to__ by Enterokinase/enteropeptidase enzyme secreted by the lining of duodenum:
A) Pepsinogen, Pepsin C) Trypsinogen, Trypsin
B) Pepsinogen, Trypsin D) Chymotrypsinogen, Chymotrypsin

Q.167 Which of the following are absorbed in the large intestine?
A) Water and salts C) Salts and glycerol
B) Water and peptones D) Amino acids and sugars

Q.168 Saliva is basically composed of water, mucus, amylase and:
A) Sodium bicarbonate C) Sodium hydroxide
B) Sodium chloride D) Hydrocarbons

Q.169 The total inside capacity of lungs is _ for man.
A) 6.7 liters C) 7 liters
B) 2.5 liters D) 5 liters

A) K+ C) Ca++
B) Cl― D) Na+

Q.176 The process through which the body maintains the internal environment from the fluctuations of external environment is called as:
A) Behavior of organisms C) Thermoregulation

Q.177 Active pumping out of Na+ occurs at which part of nephron:
A) Proximal tubule C) Ascending loop of Henle
B) Descending loop of Henle D) Collecting ducts

Q.178 The structures which respond when they are stimulated by impulse coming through motor neuron are:
A) Receptors C) Transducers
B) Responders D) Effectors

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Q.179 Thalamus and cerebrum are the part of:
A) Fore brain C) Hind brain
B) Mid brain D) Spinal cord

Q.180 There is also EVIDENCE that high levels of may contribute to the onset of Alzheimer’s disease:
A) Mg C) Al
B) Mo D) Ca

Q.181 L-dopa or Levodopa is used to get some relief from??
A) Epilepsy C) Parkinson’s disease
B) Alzheimer’s disease D) Dementia

Q.182 Spermatogonia differentiate directly into?
A) Primary spermatocytes C) Spermatozoa
B) Secondary spermatocytes D) Spermatids

A) AIDS C) Syphilis
B) Genital herpes D) Gonorrhea

Q.184 What is the location of interstitial cells in testes?
A) Inside the seminiferous tubules C) Among the germinal epithelial cells
B) Between the seminiferous tubules D) Around the testes

Q.185 A type of cells in human testes which produce testosterone are called?
A) Germ cells C) Interstitial cells
B) Sertoli cells D) Spermatocytes

Q.186 The hormone produced from corpus luteum is:
A) Prolactin C) Progesterone
B) FSH D) LH

Q.187 The length of myofibril from one Z-band to the next is described as:
A) Sarcolemma C) Sarcomere
B) Sarcoplasm D) Muscle fiber

Q.188 The Ca++ ions released during a muscle fiber contraction attach with:
A) Myosin C) Troponin
B) Actin D) Tropomyosin

Q.189 The joint that allows the movement in several directions is called:
A) Hinge joint C) Cartilagous joint
B) Ball and Socket joint D) Fibrous joint

Q.190 Where can we find H zone in the figure of fine structure of skeletal muscle’s myofibril?
A) In the mid of A band C) Besides the Z-line
B) In I-band D) Along the I-band

Q.191 First vertebra of cervical region of vertebral column is known as:
A) Atlas C) Thoracic
B) Sacral D) Axis

Q.192 Chemically insulin and glucagon are:
A) Carbohydrates C) Lipids
B) Proteins D) Nucleic acids

Q.193 Hormones secreted by anterior pituitary and which controls the secretion of hormones of other endocrine glands are known as:
A) Release factor C) Accelerator
B) Inhibitor D) Tropic or trophic hormones

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Q.194 Alpha cells of Islets of Langerhans secrete hormone called:
A) Glucocorticoid C) Glucagon
B) Insulin D) Aldosterone

Q.195 Which of the following is the function of glucagon hormone?
A) Glucose to lipids C) Glucose to glycogen
B) Glucose to proteins D) Glycogen to glucose

Q.196 In passive immunity which of the following components are injected into body?
A) Antigens C) Serum
B) Immunogens D) Immunoglobulins

Q.197 Which part of the antibody recognizes the antigen during immune response?
A) Heavy part C) Light part
B) Variable part D) Consonant part

Q.198 Two identical light chains and two identical heavy chains in antibody molecule are linked by:
A) Disulphide bridges C) Glycerol bond
B) Peptide bond D) Ionic bond

Q.199 Antibodies are produced against invading cells by:
A) Lymphocytes C) Basophils
B) Basophils D) Neutrophils

Q.200 In the structural diagram of an antibody molecule which portion is occupied by variable chains?
A) Lower region C) Middle region
B) Upper region D) In between chains

Q.201 Every molecule of NADH, fed into ETC produces:
A) 2 ATP C) 4 ATP
B) 3 ATP D) 6 ATP

Q.202 Final acceptor of electrons in respiratory chain is:
A) Cytochrome a C) Cytochrome a3
B) Oxygen D) Cytochrome c

Q.203 The end product of anaerobic respiration in humans and other mammals is:
A) Pyruvic acid C) Lactic acid
B) Ethanol D) Glucose

Q.204 A biochemical process which occurs within a cell to breakdown complex compounds to produce energy is called:
A) Respiration C) Oxidation reduction
B) Photosynthesis D) Photophosphorylation

Q.205 Which part of chlorophyll molecule absorbs light?
A) Phytol C) Pyrrole
B) Porphyrin ring D) Thylakoid membrane

Q.206 The DNA molecule formed from messenger-RNA by reverse transcriptase is called??
A) Complementary DNA C) Chimeric DNA
B) Recombinant DNA D) Plasmid DNA

Q.207 The agent which separates the two strands of DNA in PCR is??
A) DNA ligase C) Heat
B) Primer D) Helicase

Q.208 Cystic fibrosis patient lack a gene that codes for trans-membrane carrier of??
A) Na+ ions C) Ca++ ions
B) Cl― ions D) K+ ions

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Q.209 The phage commonly used as a vector in genetic engineering is?
A) Lambda phage C) T2 phage
B) Gamma phage D) T4 phage

Q.210 Restriction endonucleases are naturally occurring enzymes of:
A) Viruses C) Fungi
B) Bacteria D) Plants

Q.211 In an ecosystem mycorrhizae are an example of:
A) Predation C) Mutualism
B) Symbiosis D) Parasitism

Q.212 As a result of destruction of ozone layer there is significant increase in:
A) Ultra-violet radiations C) Nitrogen oxide
B) Greenhouse gases D) Sulphur oxide

Q.213 Higher rate of a biological activity in a nutrient rich pond water is called:
A) Water pollution C) Eutrophication
B) Air pollution D) Industrial effects

Q.214 Living part of ecosystem is:
A) lithosphere C) Community
B) Hydrosphere D) Biosphere

Q.220 The mutation which causes change in the sequence of DNA is called:
A) Point mutation C) Deletion
B) Chromosomal mutation D) Inversion