Biology Practice Test 2

Biology Practice Test 2 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 molecular biology, cell division, human physiology, plant physiology, and more, helping students improve accuracy and retention.

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1 / 100

Category: Biology Ch 5 Class 12

The cells that play a vital role in the differentiation of various body parts are called:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Ectodermal cells

B) Mesodermal cells

C) Endodermal cells

D) All of the above

2 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria possesses a spherical shape?

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Bacillus anthracis

B) Escherichia coli

C) Spirillum minus

D) Staphylococcus aureus

3 / 100

Category: Biology Ch 4 Class 11

Which of the following statement(s) is/are correct regarding a nucleus?

I.Stores wastes and other Substances

II.Contains genetic material

III.Helps in cellular transport system

IV.Control centre of the cell

NTS 2017
Biology
Cell Structure and Function
Elimination Tool:

A) I only

B) I&II

C) II & III

D) II & IV

4 / 100

Category: Biology Ch 11 Class 12

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

5 / 100

Category: Biology

Q.36 The ETC in plants consists of an electron carrier called?

A. Pq

B. Pc

C. Pt

D.Po

6 / 100

Category: Biology Ch 3 Class 11

The optimum pH for the enzyme arginase is which of the following?

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) 9.0

B) 9.3

C) 9.7

D) 10

7 / 100

Category: Biology Ch 9 Class 11

Protonema is

Thallus like

Algae like

Fungus like

Plant like

8 / 100

Category: Biology Ch 6 Class 12

The genotype of a normal male in humans is ______ chromosomes.

NTS 2012
Biology
Chromosomes and DNA
Elimination Tool:

A) 44 + XX

B) 44 + XY

C) 44 + XXY

D) 44 + XO

9 / 100

Category: Biology Ch 5 Class 12

Apical meristems are located at

Tips of leaves

Tips of flowers

Tips of roots and stems

Tips of roots only

10 / 100

Category: Biology Ch 10 Class 12

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called

Community

Family

Population

Race

11 / 100

Category: Biology Ch 10 Class 11

All of the following are coelomates except

Deuterosomes

Proterosomes

Hemichordates

Aschelminthes

12 / 100

Category: Biology Ch 2 Class 11

Which of the following is an unsaturated fatty acid?

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Oleic acid

B) Palmitic acid

C) Butyric acid

D) Acetic acid

13 / 100

Category: Biology Ch 11 Class 11

Exposure to ______ light is effective in photosynthesis as it enables guard cells to take up K+ and open the stomata.

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Red

B) Blue

C) Green

D) Orange

14 / 100

Category: Biology Ch 13 Class 12

The animals that feed on organic debris from decomposing plants and animals are called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Herbivores

B) Carnivores

C) Omnivores

D) Detritivores

15 / 100

Category: Biology Ch 12 Class 11

Midgut in cockroach is a short narrow tube called

Hepatic caeca

Gizzard

Stomach

Rectum

16 / 100

Category: Biology Ch 1 Class 12

Which of the following reduces the rate of transpiration by adaptations in xerophytes?

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Large surface area of leaves

B) Increase number of stomata

C) Thick waxy cuticle

D) Excessive loss of water

17 / 100

Category: Biology

At what point are two populations descending from the same ancestral stock considered separate species?

NUMS Mock 4
Biology
Evolution

A) When they can no longer produce viable, fertile offspring

B) When they look significantly different from each other

C) When they can interbreed successfully and produce offspring

D) When their habitats are separated by a significantly large distance so that they cannot meet

18 / 100

Category: Biology Ch 1 Class 11

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by

Environmental biologist

Paleontologist

Marine biologist

Social biologist

19 / 100

Category: Biology Ch 3 Class 11

If another molecule, having a shape very similar to the enzymes substrate, binds to its active site, it would then ____ the enzyme’s function:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Fasten

B) Inhibit

C) Reverse

D) Decrease

20 / 100

Category: Biology Ch 6 Class 12

Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called

Mutation

Transuction

Replication

Variation

21 / 100

Category: Biology Ch 4 Class 12

Testes are structures that produce:

NTS 2015 SMBBMC
Biology
Reproduction
Elimination Tool:

A) Spores

B) Sperms

C) Seeds

D) Ova

22 / 100

Category: Biology

Lecithin is formed by combining phosphatidic acid with ______:

NUMS Mock 1
Biology
Biological Molecules

A) Serine

B) Choline

C) Inositol

D) Ethanolamine

23 / 100

Category: Biology Ch 8 Class 12

Which of the following X – linked recessive trait that is more common in human males than in human females?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) Hemophilia

B) Sickle cell Anemia

C) Color Blindness

D) Hypophosphatemic rickets

24 / 100

Category: Biology Ch 11 Class 12

Wood forests form the

Pioneers community

Climax community

Top community

Transient community

25 / 100

Category: Biology

Q.35 Enzymes for light-dependent reactions of photosynthesis would most likely be associated with:

A. Outer membrane of the chloroplast

B. Inner membrane of the chloroplast

C. Stroma of the chloroplast

D. Thylakoid membranes of the chloroplast

26 / 100

Category: Biology Ch 5 Class 12

Cells of fibers and tracheids elongate during

Phase of cell division

Phase of cell elongation

Phase of cell maturation

Phase of cell differentiation

27 / 100

Category: Biology

Pick the correct option about Drosophila.

NUMS Mock 3
Biology
Variation and Genetics

A) The Male is larger with a pointed abdomen

B) The female has sex combs on its front legs

C) It has a generation time of just eight weeks

D) Salivary gland cells have giant chromosomes in their nuclei

28 / 100

Category: Biology Ch 9 Class 11

What is an example of sperms of liverworts, mosses, ferns which move towards archegonia, in response to nucleic acid released by the ovum?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Chemotropic movement

B) Chemonastic movement

C) Haptonastic movement

D) Chemotactic movement

29 / 100

Category: Biology Ch 7 Class 11

Which of the protozoa has a striking resemblance to collar cells in sponges?

Zooflagellates

Choanflagellates

Trypanosomoa

Trichonymphas

30 / 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

31 / 100

Category: Biology

The branch of science dealing with the fossil record is called:

NUMS Mock 2
Biology
Biology and its Major Fields of Specialization

A) Genetics

B) Taxonomy

C) Archeology

D) Palentology

32 / 100

Category: Biology Ch 8 Class 12

How many genes control Rh blood group system?

One

Two

Three

Four

33 / 100

Category: Biology Ch 9 Class 12

A weed engineered to produce a biodegradable plastic in cell granules is

. Mouse-cat cress

Mouse weed

Mouse-eared cress

None of these

34 / 100

Category: Biology Ch 14 Class 11

The function of papillary muscles is to:

NUMS 2020
Biology
Transport
Elimination Tool:

A) Move blood from semilunar valve into pulmonary vein

B) Prevent the backward flow of blood from the ventricle

C) Push the blood from right atrium to left atrium

D) Push the blood from left atrium to aorta

35 / 100

Category: Biology Ch 13 Class 12

Study of environmental relations is called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Physiology

B) Pulmonology

C) Morphology

D) Ecology

36 / 100

Category: Biology Ch 2 Class 12

Epinasty is controlled by

Gibberellins

Abscisins

Auxins

Cytokinins

37 / 100

Category: Biology Ch 10 Class 11

Exoskeleton of cockroach is made up of:

NUMS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) Cartilage

B) Cuticle

C) Chitin

D) Amino acids

38 / 100

Category: Biology Ch 12 Class 11

Fundography is relevant to:

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Heart

C) Stomach

B) Liver

D) Eyes

39 / 100

Category: Biology Ch 2 Class 11

Which one is the basic element of organic compounds ?

Oxygen

Hydrogen

Sulphur

Carbon

40 / 100

Category: Biology Ch 6 Class 12

Within the chromosomes, each chromatid contains ______ DNA molecule:

NUMS 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) One

B) Two

C) Three

D) Half

41 / 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

42 / 100

Category: Biology Ch 9 Class 12

A technique in transgenic animals in which desired gene is inserted into the eggs of animal is called:

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) Embryonic Stem Cell mediated Transfer

B) Microinjection

C) Retro-virus mediated gene Transfer

D) Virus vectors

43 / 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

44 / 100

Category: Biology Ch 5 Class 12

Which of the following is not related to apoptosis?

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) Loss of tail of developing humans embryos

B) Loss of tissues between developing digits

C) Controlling the number of neurons

D) None of the given options

45 / 100

Category: Biology Ch 13 Class 11

Xerophytes have small thick leaves to;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Help them float on water

B) Limit water loss, by increasing the surface area

C) Help them survive in salty environment

D) Limit water loss, by reducing the surface area

46 / 100

Category: Biology Ch 2 Class 11

Which one are most complex sugar:

Monosaccharides

Oligosaccharides

Polysaccharides

None of these

47 / 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

48 / 100

Category: Biology

Q.41 Corpus luteum is yellow glandular mass and is important source of:

A. Estrogen

B. FSH

C. Testosterone

D. Progesterone

49 / 100

Category: Biology

Tails can be regenerated in:

NUMS Mock 3
Biology
Growth and Development

A) The larvae of amphibians

B) Lizards

C) Both lizards and the larvae of amphibians

D) None of the given options

50 / 100

Category: Biology Ch 13 Class 11

As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

51 / 100

Category: Biology

Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Ribosomes

B) Cytoplasm

C) Golgi apparatus

D) Endoplasmic reticulum

52 / 100

Category: Biology Ch 1 Class 12

Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of:

Chemotropic movement

Chemotactic movement.

Chemosastic movement

. Haptonastic movement.

53 / 100

Category: Biology Ch 7 Class 12

Process of uncontrolled cell division is due to which one of the following reasons?

NUMS 2018
Biology
Cell Cycle
Elimination Tool:

A) DNA replication

B) Mutations

C) Translation

D) Transcription

54 / 100

Category: Biology Ch 4 Class 12

All of the following are sexually transmitted diseases except:

NTS 2011
Biology
Reproduction
Elimination Tool:

A) Syphilis

B) Gonorrhea

C) Alzheimer's Disease

D) Genital Herpes

55 / 100

Category: Biology Ch 12 Class 11

Which of the following have both internal and external digestion?

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Hydra

B) Jelly fish

C) Cockroach

D) All of these

56 / 100

Category: Biology Ch 2 Class 12

Gibberellins is an example of

Growth inhibitor

Growth stimulator

Growth hormone

None of these

57 / 100

Category: Biology Ch 1 Class 12

Rose is an example of

Hydrophytes

Mesophytes

Xerophytes

Halophytes

58 / 100

Category: Biology Ch 11 Class 11

The end product of Glycolysis is:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Glucose-6-phosphate

B) Fructose-6-phosphate

C) Pyruvate

D) 3-Phosphoglycerate

59 / 100

Category: Biology Ch 11 Class 11

The dark reactions of photosynthesis are characterized by:

NTS 2016 DUHS & JSMU
Biology
Bioenergetics
Elimination Tool:

A) Synthesis of ATP, O2 and NADH

B) Utilization of ATP, CO2 and NADPH

C) Electron transfer from NADPH to RuBP

D) Carbon dioxide transfer from RuBP to glucose

60 / 100

Category: Biology Ch 13 Class 12

Which one is a non-renewable resource?

Wild life

Forests

Natural gas

Land

61 / 100

Category: Biology Ch 10 Class 12

In the Hardy – Weinberg principle, p2 + 2pq + q2 = 1 . q2 represents the frequency of the:

NTS 2010
Biology
Evolution
Elimination Tool:

A) Homozygous dominant

B) Heterozygous dominant

C) Heterozygous recessive

D) Homozygous recessive

62 / 100

Category: Biology Ch 1 Class 11

Which character differentiates living things from non-living organisms?

They live in the same ecosystem.

They are acted upon by the same environment

They are highly organized and complex made of one or more cells and contain genetic material

Both a and b

63 / 100

Category: Biology

NAD is an example of:

NUMS Mock 1
Biology
Biological Molecules

A) Mononucleotide

B) Dinucleotide

C) Trinucleotide

D) Tetranucleotide

64 / 100

Category: Biology Ch 3 Class 11

In enzymatic mechanism, the substrate bind to the enzyme active site to produce?

PMC Practice 3
Biology
Enzymes
Elimination Tool:

A) Reactants

B) Enzymes

C) Products

D) All of these

65 / 100

Category: Biology Ch 5 Class 11

Which of the following diseases is sexually transmitted?

PMC 2020
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

66 / 100

Category: Biology Ch 3 Class 11

A substance which binds at the active site of the enzyme but does not result in the formation of the products is called:

Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Non-competitive inhibitor

67 / 100

Category: Biology Ch 6 Class 12

Particular array of chromosomes that an individual processes is called its:

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Nucleosome

B) Gene pool

C) Karyotype

D) Centromere

68 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

69 / 100

Category: Biology Ch 10 Class 11

In mosquitoes, the plasmodium is found in?

NTS 2015 SMBBMC
Biology
Kingdom Animalia
Elimination Tool:

A) Salivary glands

B) Wings

C) Blood

D) Both Options A and B are correct

70 / 100

Category: Biology

Q3 These animals show radial symmetry.

A. Chordates

B. Annelids

C. Cnidarian

D Round worms

71 / 100

Category: Biology Ch 11 Class 11

Which of the following light is least absorbed by the plants:

Orange

Red

Blue

Green

72 / 100

Category: Biology Ch 2 Class 12

In presence of muscle contraction, ______ is brought closer, _____ shortens and ______ disappears.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Z – line, H – zone, I – band

B) I – band, Z – line, H – zone

C) Z – line, I – band, H – zone

D) H – zone, I – band, Z – line

73 / 100

Category: Biology

Q.23 During inspiration, the diaphragm:

A. Contracts

B. Relaxes

C. Contracts and relaxes

D. None of these

74 / 100

Category: Biology Ch 4 Class 12

Pituitary gland releases ______ hormone and _______ hormone while ovaries produce _______ and progesterone.

NTS 2019
Biology
Reproduction
Elimination Tool:

A) Follicle-stimulating and luteinizing, estrogen

B) Estrogen and follicle-stimulating, luteinizing

C) Luteinizing arid estrogen, follicle-stimulating

D) Follicle-stimulating and estrogen, luteinizing

75 / 100

Category: Biology Ch 10 Class 12

Archaebacteria can survive at

150?C

300?C

120?C

200?C

76 / 100

Category: Biology Ch 9 Class 12

Which one of the following is made up of radioactively labelled nucleotides?

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) Phage DNA

B) Genomic Library

C) Recombinant DNA

D) Gene Probe

77 / 100

Category: Biology Ch 4 Class 12

Duration of menstrual cycle is how many days on average?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) 25

B) 26

C) 27

D) 28

78 / 100

Category: Biology Ch 10 Class 12

Analogous organs show

Convergent evolution

Divergent evolution

Straight evolution

Zig-zag evolution

79 / 100

Category: Biology Ch 10 Class 11

The animals in which coelom is formed due to splitting of mesocerm are known as

Pseudocoelous

Schizocoelous

Enterocoelous

Emphicoelous

80 / 100

Category: Biology Ch 13 Class 11

The most important cause of many of the respiratory disorders is:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Bacterial infection

B) Pollution

C) Smoking

D) Drinking

81 / 100

Category: Biology Ch 1 Class 12

High level of _____ and _____ in the blood and the contributing factors in the formation of kidney stones.

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Calcium, oxalate

B) Calcium, magnesium

C) Calcium, sodium

D) Sodium, sulphate

82 / 100

Category: Biology

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3Mgl

83 / 100

Category: Biology Ch 9 Class 12

Liposomes are:

PMC 2021 Tested
Biology
Biotechnology
Elimination Tool:

A) All of these

B) Made of at least one lipid bilayer

C) Artificial

D) Used to deliver drugs

84 / 100

Category: Biology

Q43 Which cells produce oogonia in ovary?

A. Stromal cells

B. Epithelial cells

C. Germ cells

D. Theca cells

85 / 100

Category: Biology Ch 6 Class 11

Which of the following structure primarily helps in attachment of bacteria on various surfaces?

Flagella

Pili

Both of these

None of these

86 / 100

Category: Biology

The following statements are about enzymes:

1. They are globular proteins

2. They can be inhibited by competitive inhibitors

3. They are formed in the smooth endoplasmic reticulum

4. There are only found attached to Plasma membranes in the cell

Which statements are correct for all enzymes?

NUMS Mock 3
Biology
Enzymes

A) 1 and 4

B) 2 and 4

C) 1 and 2

D) 1,2,3 and 4

87 / 100

Category: Biology Ch 5 Class 12

In multicellular plants cell division occur by

Binary fission

Conjugation

Meiosis

Mitosis

88 / 100

Category: Biology

Q.23 Reflex action is type of

A. Voluntary action

B. Involuntary action

C. Saltatory conduction

D. None of these

89 / 100

Category: Biology Ch 6 Class 11

Purple non-sulphur bacteria is an example of which of the following?

PMC Practice 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Heterotrophic bacteria

B) Saprotrophic bacteria

C) Chemosynthetic bacteria

D) Photosynthetic bacteria

90 / 100

Category: Biology Ch 5 Class 12

Turner’s syndrome is characterized by having:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Trisomy 21

B) 44 + XXY

C) Trisomy

D) 44 + XO

91 / 100

Category: Biology Ch 14 Class 11

Antibodies are actually:

NUMS 2016
Biology
Transport
Elimination Tool:

A) Globular proteins

B) Glycoproteins

C) Fibrous proteins

D) Glycolipids

92 / 100

Category: Biology Ch 7 Class 12

At what phase the DNA content of a cell is doubled?

PMC 2020
Biology
Cell Cycle
Elimination Tool:

A) Prophase

B) Interphase

C) Anaphase

D) Telophase

93 / 100

Category: Biology Ch 2 Class 12

Joints found at the vertebrates are:

NTS 2014
Biology
Support and Movement
Elimination Tool:

A) gliding joints

C) partially moveable joints

B) sliding joints

D) fixed joints

94 / 100

Category: Biology

Q.63 Which hormone is produced mainly by corpus luteum in she ovary following ovulation?

A. Progesterone

B. FSH

C.LH

D. Chorionic gonadotrophic hormone

95 / 100

Category: Biology Ch 7 Class 11

How are flat worms not similar to round worms?

PMC Practice 4
Biology
Kingdom Protista
Elimination Tool:

A) They are both acoelmates.

B) They are both triploblastic.

C) They both show bilateral symmetry.

D) They are both worms.

96 / 100

Category: Biology Ch 2 Class 11

Ptyalin can convert starch into:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Monosaccharide form

B) Oligosaccharide form

C) Polysaccharide form

D) All given options

97 / 100

Category: Biology

Q.33 The researcher notices that round seeds occur maturely in the environment.Based solely on this information, what can there searcher conclude about the round phenotype?

A. It is dominant

B. It is recessive

C. It is wild type

D. Both a and b

98 / 100

Category: Biology Ch 9 Class 11

The simplest of all bryophytes are

Thallophytes

Embryophytes

Mosses

Liverworts

99 / 100

Category: Biology Ch 10 Class 12

Which condition can be explained by Lamarckism?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) How giraffes got their long neck

B) How humans lost their tail

C) How humans became bipedal

D) all of these

100 / 100

Category: Biology Ch 10 Class 11

Coelom that develops from the archenteron as outpouching is

Pseudocoelom

Enterocoelom

Schizocoelom

None of these

Your score is

The average score is 57%

Structured Practice for Best Entry Test Preparation

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