Biology Practice Test 4

Biology Practice Test 4 is designed to help students strengthen their understanding of key biological concepts, theories, and processes for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from human anatomy, physiology, microbiology, and ecology, helping students improve accuracy and retention.

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Biology Practice Test 4

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1 / 100

Category: Biology Ch 4 Class 12

Which of the following is found beneath the prostate gland?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) vas deferens

B) seminal vesicle

C) urethra

D) cowper's gland

2 / 100

Category: Biology

Q.67 Interaction between genes occupying different loci is:

A. Dominance

B. Pleiotropy

C. Epistasis

D. Gene linkage

3 / 100

Category: Biology Ch 5 Class 11

A bacteriophage consists solely of:

NTS 2011
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) DNA and protein

B) RNA and protein

C) RNA only

D) Protein only

4 / 100

Category: Biology Ch 9 Class 12

In the commercial manufacture of insulin, a human gene is inserted into which one of the following?

NTS 2013
Biology
Biotechnology
Elimination Tool:

A) A chromosome of a human cell

B) A protein molecule in a yeast cell

C) The DNA of a bacterium

D) The nucleic acid in a virus

5 / 100

Category: Biology

Q.54 First cardiac sound is associated with:

A. Closure of tricuspid and bicuspid valves

B. Closure of semilunar valves

C. Opening of tricuspid valves

D. Opening of semilunar valves

6 / 100

Category: Biology Ch 2 Class 11

The specific heat capacity of water is the number of calories required to raise the temperature of water from _____ ˚C is 1.0.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 15 to 16

B) 16 to 18

C) 15 to 20

D) 25 to 29

7 / 100

Category: Biology Ch 7 Class 12

During meiosis, the homologous chromosomes come together and form pairs, this process is called:

PMC 2020
Biology
Cell Cycle
Elimination Tool:

A) Linkage

B) Synapsis

C) Pairing

D) Crossing over

8 / 100

Category: Biology Ch 9 Class 12

A single stranded nucleotide sequence that will hybridize into a certain piece of DNA is

Primer

Probe

Genome

Both a & b

9 / 100

Category: Biology Ch 4 Class 12

Viviparous animals are those in which

. Internal fertilization with external development in eggs

Internal fertilization with internal development inside female body

Internal fertilization and internal development followed by hatching of egg

External fertilization with external development

10 / 100

Category: Biology Ch 2 Class 11

When the hydroxyl group, -OH, of the carboxyl group, -COOH, of an amino acid is linked with the hydrogen of the amino group, -NH2, of another amino acid, ______ is released and a peptide bond is formed.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) NH3

B) CO2

C) H2O

D) O2

11 / 100

Category: Biology Ch 7 Class 11

Plasmodium belongs to

Ciliates

Apicomplexans

Actinopods

Foraminferans

12 / 100

Category: Biology Ch 6 Class 12

Which of the following enzymes is used to join DNA fragments?

NTS 2016 DUHS & JSMU
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA polymerase

B) Ligase

C) Primase

D) Endonuclease

13 / 100

Category: Biology

Q.67 What is the property of the part of a cell membrane which is in contact with external and internal environment?

A. hydrophobic

B. hydrophilic

C. neutral

D. Both A and B

14 / 100

Category: Biology

Gel electrophoresis is a technique:

NUMS Mock 1
Biology
Biotechnology

A) Employed by forensic scientist to assist in the identification of the individuals by their respective type of DNA

B) Collect all the genes found in one complete set of chromosome

C) Is a technique to separate different sizeds fragment of charge bearing polymers (proteins, RNA or DNA)

D) Grows single cell or a group of cells in a glass ware on artificial medium under aseptic conditions

15 / 100

Category: Biology Ch 12 Class 11

The disease night blindness is caused by deficiency of vitamin:

NTS 2016 SMBBMC
Biology
Nutrition
Elimination Tool:

A) A

B) B

C) C

D) D

16 / 100

Category: Biology

Which of the following diseases is sexually transmitted?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

17 / 100

Category: Biology Ch 5 Class 11

Allium cepa is the scientific name of :

Onion

Amaltas

Potato

Tomato

18 / 100

Category: Biology

The idea that opposed the idea of abiogenesis was proposed by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Robert Hooke

B) Robert Brown

C) Rudolph Virchow

D) Lorenz Oken

19 / 100

Category: Biology Ch 4 Class 11

In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon:

Their physical properties like size & weight.

Physical properties of the medium like its density.

Their electrical properties like their charges

Both a and b

20 / 100

Category: Biology Ch 2 Class 11

Which one are most complex sugar:

Monosaccharides

Oligosaccharides

Polysaccharides

None of these

21 / 100

Category: Biology Ch 2 Class 11

Human cells maintain concentration gradients across their plasma membranes, such that there is a high sodium concentration outside the cell and a high potassium concentration inside the cell.

Suppose that within the cell membrane are sodium leak channels or carrier proteins. These channels would allow sodium to:

NTS 2017
Biology
Biological Molecules
Elimination Tool:

A) move out of the cell by simple diffusion

B) move into the cell by simple diffusion

C) move out of the cell by facilitated diffusion

D) move into the cell by facilitated diffusion

22 / 100

Category: Biology Ch 10 Class 12

Whose theory of natural selection is essentially identical to Darwin’s theory?

NUMS 2019 Cancelled
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Alfred Wallace

C) Lyell

D) Mathus

23 / 100

Category: Biology Ch 12 Class 11

Magnesium is present in which of the following?

Cytochromes

ATP

Chlorophyll

Haemoglobin

24 / 100

Category: Biology Ch 11 Class 11

Which of the following is a chemical link between catabolism and anabolism?

AMP

ADP

ATP

All of these

25 / 100

Category: Biology Ch 3 Class 11

What is not true about the induced fit model:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Explains mechanism of enzyme action

B) Enzyme is specific in nature

C) Enzyme is a flexible structure

D) Enzyme doesn’t show change during reaction

26 / 100

Category: Biology Ch 10 Class 12

Which of the following concepts is attributed to Lamarck?

NUMS 2014
Biology
Evolution
Elimination Tool:

A) Struggle for existence

B) Survival of the fittest

C) Inheritance of acquired characters

D) Cells come from pre-existing cells

27 / 100

Category: Biology Ch 2 Class 12

Which of the following plays the major role in providing support to young herbaceous parts of the plant:

Living cells of epidermis with higher turgor pressure.

Living cells of cortex and pith with higher turgor pressure.

Collenchyma cells

All of these

28 / 100

Category: Biology

Q.11 In cocci, three plane division result in formation of sarcine which is a

A. Cuba of 8 cocci

B. Square of 4 cocci

C. Irregular structure

D. Triangular 6 cocci

29 / 100

Category: Biology

Which of the following statements are true for mitochondria and chloroplasts?

A. ATP synthesis is seen in both
B. Outer membrane has more surface area in both
C. Circular naked DNA, RNA, and 70 ribosomes are seen in both
D. Oxidative phosphorylation occurs in both

NUMS Mock 4
Biology
Cell Structure and Function

A) A and B

B) B and C

C) A and C

D) A and D

30 / 100

Category: Biology Ch 7 Class 11

Golden algae are also known as

Chrysophyta

Phaeophyta

Pyrrophyta

Rhodophyta

31 / 100

Category: Biology Ch 5 Class 12

Microcephaly, the small sized skull is due to:

NUMS 2016
Biology
Growth and Development
Elimination Tool:

A) Nutritional causes

B) Skeleton causes

C) Hormonal causes

D) Genetic defects

32 / 100

Category: Biology Ch 5 Class 11

Diseases in living organisms which are caused by parasites are called:

NUMS 2016
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Disinfestations

B) Antisepsis

C) Infections

D) Infestations

33 / 100

Category: Biology

Which of the following is correct in humans?

NUMS Mock 1
Biology
Reproduction

A) Both sperm and egg contain yolk

B) All genetic information comes from sperm

C) Sperm contains little cytoplasm

D) Fertilization commonly occurs in the uterus

34 / 100

Category: Biology Ch 14 Class 11

Which valve action results from an increase in pressure in the ventricles of the heart?

NTS 2012
Biology
Transport
Elimination Tool:

A) The closing of all the heart valves

B) The closing of semilunar valves

C) The opening of the bicuspid valve

D) The opening of the semilunar valves

35 / 100

Category: Biology Ch 13 Class 11

Of the following, which one is better respiratory medium.

Air

Water

Soil

None of these

36 / 100

Category: Biology Ch 8 Class 11

Type of lichen which tightly attaches to rocks is

Parmelia

Fruticose

Foliose

Crustose

37 / 100

Category: Biology Ch 2 Class 11

Most simple amino acid is:

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) Alanine

B) Valine

D) Lycine

C) Glycine

38 / 100

Category: Biology Ch 14 Class 11

Choose the correct pathway for the flow of blood:

NUMS 2020
Biology
Transport
Elimination Tool:

A) Arterioles → metarterioles → capillaries → thoroughfare channels

B) Arterioles → thoroughfare channel → metarterioles → capillaries

C) Thoroughfare channel → arterioles → capillaries → metarterioles

D) Metarterioles → arterioles → thoroughfare channels → capillaries

39 / 100

Category: Biology Ch 2 Class 11

Carbon atom is

Monovalent

Divalent

Trivalent

40 / 100

Category: Biology Ch 3 Class 11

The enzyme in breast milk that causes the coagulation of milk or forms precipitates of milk is:

NUMS 2016
Biology
Enzymes
Elimination Tool:

A) Renin

B) Trypsin

C) Amylase

D) Lipase

41 / 100

Category: Biology

Q.16 Retroviruses have a special enzyme ‘reverse transcriptase’ which can convert ____________into ___________.

A. DNA to DNA

B. RNA to DNA

C. DNA to RNA

D. RNA to RNA

42 / 100

Category: Biology

Movement of the Hip joint is which type of synovial joints?

NUMS Mock 1
Biology
Support and Movement

A) Gliding joint

B) Ball and socket joint

C) Pivot joints

D) Hinge joint

43 / 100

Category: Biology Ch 1 Class 12

Rapid movement of leaves of mimosa on touching is an example of :

Turgor movement

Nastic movement

Tropic movements.

Growth movement

44 / 100

Category: Biology Ch 11 Class 12

Wood forests form the

Pioneers community

Climax community

Top community

Transient community

45 / 100

Category: Biology Ch 10 Class 12

The wings of birds and the forelegs of a horse are _____ structures.

NUMS 2016
Biology
Evolution
Elimination Tool:

A) Analogous

B) Homologous

C) Vestigial

D) Evolutionary convergent

46 / 100

Category: Biology Ch 10 Class 11

Coelom is lined by

Parietal mesoderm

Visceral mesoderm

Mesoderm

Both A & B

47 / 100

Category: Biology

The scientific name of thorn Apple is?

NUMS Mock 2
Biology
Kingdom Plantae

A) Sycopodium phlogmaria

B) Anthocoros fusiform

C) Ginkgo biloba

D) Datura alba

48 / 100

Category: Biology

Q.5 Which statement is incorrect?

A. In short day plants red light prevents flowering

B. In long day plants for red light promotes flowering

C. Leaf unrolling occurs in grasses

D. Henbane is a short-day plant

49 / 100

Category: Biology Ch 1 Class 12

Excretory system, consisting of protonephridia tubes, are present in phylum:

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Porifera

B) Annelida

C) Platyhelminthes

D) Cnidaria

50 / 100

Category: Biology Ch 13 Class 12

Which of the following describes an ecological niche?

NTS 2015 SMBBMC
Biology
Man and His Environment
Elimination Tool:

A) The habitat in which an organism finds its food supply

B) The habitat in which an organism find the most suitable climate

C) the relationship between an organism and other species

D) the way in which an environment is exploited by an organism

51 / 100

Category: Biology Ch 3 Class 11

Optimum temperature for enzymes of human body is:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) 90 F

B) 95 F

C) 98 F

D) 100 F

52 / 100

Category: Biology Ch 8 Class 12

How many genes control Rh blood group system?

One

Two

Three

Four

53 / 100

Category: Biology Ch 8 Class 12

Which traits are most likely to affect men than women?

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) X linked recessive

B) X linked dominant

C) Autosomal dominant

D) Autosomal recessive

54 / 100

Category: Biology Ch 2 Class 11

Movement of ions and large molecules with the help of protein molecules in and out of the cell is called _________.

NTS 2016 DUHS & JSMU
Biology
Biological Molecules
Elimination Tool:

A) Diffusion

B) Facilitated diffusion

C) Passive transport

D) Osmosis

55 / 100

Category: Biology

Q.50 How does each photoexcited electron pass from PS1 to PS2?

A. ETC

B. chemiosmosis

C. photolysis

D. photosynthesis

56 / 100

Category: Biology Ch 9 Class 12

Taq polymerase is extracted from a bacterium

Floral aquaticus

Taq aquaticus

Thermus floral

Thermus aquaticus

57 / 100

Category: Biology Ch 3 Class 11

Which statement is incorrect about Lock and Key Model?

Specific enzyme can transform only a specific substrate

Active site of an enzyme is a non flexible structure.

Active site does not change before during or even after the reaction.

It explains the mechanism of every chemical reaction.

58 / 100

Category: Biology Ch 13 Class 11

Haemoglobin carries more oxygen than plasma by:

NTS 2011
Biology
Gaseous Exchange
Elimination Tool:

A) 50 times

B) 20 times

C) 70 times

D) 100 times

59 / 100

Category: Biology Ch 4 Class 11

Which of the following is not a basic unit of the cell?

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Cell wall

B) Cell membrane

C) Nucleus

D) Ribosome

60 / 100

Category: Biology Ch 1 Class 12

The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

NTS 2014
Biology
Homeostasis
Elimination Tool:

A) collecting duct …. by active secretion

C) glomerulus …. by selective reabsorption

D) glomerulus …. by ultrafiltration

E) Proximal convoluted tubule …. By active reabsorption

61 / 100

Category: Biology Ch 7 Class 11

The drfinite shape to ciliates is given by

Pellicle

Penicle

Calcium

Cell wall

62 / 100

Category: Biology Ch 3 Class 12

Direction of reflex action is from:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Receptor to sensory neuron to motor neuron and then through associative neurons to effect.

B) Receptor to sensory neuron to associative neuron and then through motor neurons to effector.

C) Effector to sensory neuron to associative neuron and then through motor neurons to Receptor.

D) Effector to sensory neuron to motor neuron and then through associative neurons to Receptor.

63 / 100

Category: Biology

In which of the following growth phases, the number of bacteria increases the most rapidly?

NUMS Mock 4
Biology
Kingdom Protista

A) Lag phase

B) Log phase

C) Stationary phase

D) Death / Decline phase

64 / 100

Category: Biology Ch 10 Class 11

Despite the structural diversities, ____ are characterized by having a soft body protected by a calcareous shell developing from the mantle layer.

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Corals

B) Foraminiferos

C) Molluscs

D) None of these

65 / 100

Category: Biology Ch 3 Class 12

Diameter of an artery can be changed by:

NUMS 2015
Biology
Coordination and Control
Elimination Tool:

A) Nervous stimulation

B) Chemical stimulation

C) Both chemical and nervous stimulation

D) None of the given options

66 / 100

Category: Biology Ch 4 Class 11

A group of ribosomes attached to mRNA is known as

Polymer

Polypeptide

Polysomes

Monomer

67 / 100

Category: Biology Ch 7 Class 11

Which of the following statement about Kingdom Protista is incorrect?

Their members have characteristics which separate them from other kingdoms

They only include unicellular aquatic eukaryotic organisms.

They do not develop from Blastula or embryo.

They contain ancestors for fungi plants & animals

68 / 100

Category: Biology

Q.13 The frequency of allele if it is evolutionary successful is?

A. increased

B. Enzymes

C. no change

D. All of these

69 / 100

Category: Biology

During cell division, the spindle fibres get attached to condensing chromosome at a highly differentiated region. This region is called as:

NUMS Mock 1
Biology
Cell Cycle

A) Chromosome

B) Chromocentre

C) Centriole

D) Kinetochore

70 / 100

Category: Biology Ch 10 Class 11

Which one of following is a true fish?

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Cuttle fish

B) Silver fish

C) Jelly fish

D) Sea fish

71 / 100

Category: Biology

Q.21 When was the Tobacco mosaic virus successfully crystalized?

A. 1935

B.1930

C. 1932

D.1920

72 / 100

Category: Biology

In chemiosmosis, the proton (H+) moves from _______.

NUMS Mock 4
Biology
Bioenergetics

A) Stroma to Lumen

B) Cytoplasm to Stroma

C) Lumen to Stroma

D) Stroma to cytoplasm

73 / 100

Category: Biology Ch 11 Class 11

Which component enters into mitochondria after glycolysis?

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Pyruvate

B) Acetate

C) Oxaloacetate

D) Acetyl – CoA

74 / 100

Category: Biology Ch 6 Class 11

A bacterial cell envelope of mollicutes does not include?

PMC Sample 1
Biology
Kingdom Prokaryote
Elimination Tool:

A) Slime

B) Capsule

C) Cell wall

D) Cell membrane

75 / 100

Category: Biology Ch 1 Class 12

Which hormone prepares the body for situations of stress and emergency?

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Adrenaline

B) Non adrenaline

C) Thyroxin

D) Insulin

76 / 100

Category: Biology Ch 8 Class 11

Which one of the following is different from all the rest regarding the number of cells inits body?

Rusts

Mushrooms

Molds

Yeasts

77 / 100

Category: Biology

Muscular tube that passes through pharynx and joins stomach is:

NUMS Mock 1
Biology
Nutrition

A) Trachea

B) NG tube

C) Nerve canal

D) Esophagus

78 / 100

Category: Biology Ch 12 Class 11

Of the following, which one has more variety of nutrition?

Animals

Bacteria

Plants

Fungi

79 / 100

Category: Biology Ch 13 Class 11

______ respiration is the process by which cell utilized oxygen and produces CO2

Cellular

Organismic

Both of these

None of these

80 / 100

Category: Biology

Q.17 Final acceptor of electrons in respiratory chain is?

A. NADH

B. Cytochrome a3

C. Water

D. Oxygen

81 / 100

Category: Biology Ch 9 Class 11

Ferns are included in

Psilopsida

Lycopsida

Sphenopsida

Pteropsida

82 / 100

Category: Biology Ch 10 Class 12

The organs which are similar in function but differ in structure are called:

PMC 2020
Biology
Evolution
Elimination Tool:

A) Analogous organs

B) Homologous organs

C) Convergent evolution

D) Divergent evolution

83 / 100

Category: Biology Ch 6 Class 12

In a typical nucleotide, the nitrogenous base is attached to _______ carbon of pentose sugar.

NTS 2010
Biology
Chromosomes and DNA
Elimination Tool:

B) 5th

C) 4th

D) 3rd

E) 1st

84 / 100

Category: Biology Ch 13 Class 11

The function of respiratory passage, Cilia is to keep the airways clear of:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Carbon dioxide

B) Oxygen

C) Dust

D) Carbon Monoxide

85 / 100

Category: Biology Ch 1 Class 12

Right kidney is slightly lower than left kidney due to:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Heart

B) Liver

D) Lungs

C) Pancreas

86 / 100

Category: Biology Ch 13 Class 12

Which one is a non-renewable resource?

Wild life

Forests

Natural gas

Land

87 / 100

Category: Biology Ch 1 Class 12

Which part of the brain regulates body temperature?

NTS 2016 SMBBMC
Biology
Homeostasis
Elimination Tool:

A) Cerebellum

B) Cerebrum

C) Hypothalamus

D) Medulla

88 / 100

Category: Biology Ch 5 Class 12

Growth of multicellular plants occur in

Two phases

Three phases

Five phase

Four phases

89 / 100

Category: Biology Ch 8 Class 11

Foliose lichen are

Stem like

Branching

Leaf like

Crust like

90 / 100

Category: Biology

Which of the following nutrients is incorrectly paired with its function in a plant?

NUMS Mock 3
Biology
Nutrition

A) Potassium – Formation of cell wall.

B) Magnesium – Constituent of chlorophyll.

C) Nitrogen – Constituent of protein.

D) Phosphorus – Component of nucleic acid.

91 / 100

Category: Biology Ch 8 Class 12

A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

Segregation

Independent assortment

Both of these

None of these

92 / 100

Category: Biology Ch 9 Class 11

Red algae do not contribute towards:

PMC 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Making coral reefs

B) Forming limestone deposits

C) Making fertilizers

D) Forming chalk deposits

93 / 100

Category: Biology Ch 6 Class 12

Diameter of DNA double helix is:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) 3.4 nm

B) 0.3 nm

D) 0.2 nm

C) 2 nm

94 / 100

Category: Biology Ch 3 Class 12

At the induction of action potential opening of Na+ gate with influx of Na+ is a _________ processes:

Active transport

Passive transport.

Diffusion

none of these.

95 / 100

Category: Biology Ch 1 Class 12

Which organ is called the body thermostat?

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Pituitary gland

B) Kidneys

C) Hypothalamus

D) Adrenal gland

96 / 100

Category: Biology Ch 12 Class 12

Zone of lake water which is of open water near the surface is

Littoral

Limnetic

Profundal

Benthic

97 / 100

Category: Biology

Q.36 Parkinson’s disease is caused by cell death, which produces ____________.

A. Acetylcholine

B. Serotonin

C. Dopamine

D. Adrenaline

98 / 100

Category: Biology Ch 3 Class 11

Which step causes activation of catalytic site of an enzyme?

Change in pH of the surroundings.

Formation of Enzyme Susstrate complex.

Change in the charge of the active site.

Change in temperature

99 / 100

Category: Biology Ch 11 Class 11

The light dependent reaction of photosynthesis occurs in:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Stroma of chloroplast

B) Guard cells of stomata

C) Thylakoid membrane of chloroplast

D) Cytoplasm of leaf cell

100 / 100

Category: Biology Ch 12 Class 11

Which type of mucosa cells secrete pepsinogen?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Zymogen

B) Oxyntic

C) Mucous

D) Gastric

Your score is

The average score is 61%

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