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 8 Class 11

The stored food in fungi is usually lipid droplets of:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Glucose

B) Glycogen

C) Starch

D) Protein

2 / 100

Category: Biology Ch 9 Class 12

By PCR we mean:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Polymerase chronic reaction

B) Polymerase chain reaction

C) Polymerase copy reaction

D) Polymerase cross reaction

3 / 100

Category: Biology Ch 2 Class 11

In an isotonic solution there would be:

NTS 2016 SMBBMC
Biology
Biological Molecules
Elimination Tool:

A) No net movement of water

B) Net movement of water into the cell

C) Net movement of water out of the cell

D) Bursting of the cell

4 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

Plant

Fungus

Animal

Algae

5 / 100

Category: Biology

NAD is an example of:

NUMS Mock 1
Biology
Biological Molecules

A) Mononucleotide

B) Dinucleotide

C) Trinucleotide

D) Tetranucleotide

6 / 100

Category: Biology

Q.56 Which of the following is nota viral disease?

A. Smallpox

Mumps

C. Tetanus

D. Cowpox

7 / 100

Category: Biology Ch 4 Class 11

In which type of cells, cell wall is not present?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Plant cells

B) Fungal cells

C) Bacterial cells

D) Liver cells

8 / 100

Category: Biology Ch 9 Class 12

Taq polymerase is extracted from a bacterium

Floral aquaticus

Taq aquaticus

Thermus floral

Thermus aquaticus

9 / 100

Category: Biology

Q.54 Structures that were once functional in the past but no longer serve a purpose due to evolutionary adaptations and physiological changes are referred to as?

A Vestigial
B. Analogous structures
C. Homologous structures
D. None of these

A Vestigial

B. Analogous structures

C. Homologous structures

D. None of these

10 / 100

Category: Biology Ch 13 Class 12

Water constitutes –% of body weight?

A. 25-30%

70-90%

10-30%

30-50%

11 / 100

Category: Biology Ch 5 Class 11

The word virus is derived from Latin word venome meaning

Sweet fluid

Sore Fluid

Poisonous Fluid

Salty Fluid

12 / 100

Category: Biology Ch 13 Class 11

Which of the following is not an infection of the lungs/respiratory tract?

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

13 / 100

Category: Biology

Which processes are essential in making nitrogen from dead plant material available to growing plants?

ammonification
deamination
nitrification
nitrogen fixation
NUMS Mock 2
Biology
Man and His Enviornment

A) I, II and III only

B) I, II and IV only

C) I, III and IV only

D) II, III and IV only

14 / 100

Category: Biology

Q.17 Teichoic acids are the characters of:

A. Gram Positive bacteria

B. Mycoplasma

C. Gram Negative bacteria

D. Archaeobacteria

15 / 100

Category: Biology

Q.51 The heavy and light chains of an antibody molecule is held together by:

A. H-bonds

B. Disulphide bridges

C. Ionic interactions

D. Hydrophobic interactions

16 / 100

Category: Biology Ch 3 Class 12

Which of the following is not the function of the cerebrum?

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Voluntary digestion

B) Thinking

C) Intelligence

D) Skeletal muscles

17 / 100

Category: Biology Ch 12 Class 12

Coniferous forests located at high altitude are called

Taiga

Alpine

Boreal

Arctic

18 / 100

Category: Biology Ch 3 Class 12

Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

None of these.

19 / 100

Category: Biology Ch 6 Class 12

In Maxam – Gilbert method, DNA threads are:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) Chemically synthesized

B) Synthesized from mRNA

C) Synthesized by using terminating nucleotides

D) Chemically cut into pieces

20 / 100

Category: Biology Ch 14 Class 11

Which of the following blood vessels have the highest pressure of blood?

NUMS 2020
Biology
Transport
Elimination Tool:

A) Aorta

B) Pulmonary arteries

C) Pulmonary veins

D) Vena Cava

21 / 100

Category: Biology Ch 13 Class 11

The respiratory pigment, which has much higher affinity to combine with oxygen is:

NUMS 2016
Biology
Gaseous Exchange
Elimination Tool:

A) Myoglobin

B) Globin

C) Haemoglobin

D) Hemocyanin

22 / 100

Category: Biology Ch 6 Class 12

Which statement is correct?

Leading strand elongates away from the replication fork

Lagging strand elongates towards the replication fork

Lagging strand is constructed discontinuously.

Both a and b

23 / 100

Category: Biology Ch 12 Class 12

Which statement about profundal zone is correct?

Plants are unable to anchor but enough light penetrates to support photosynthesis

Phytoplanktons in this region are cyanobacteria

Decomposers and detritus feeders inhabit it

Water lilies are abundant

24 / 100

Category: Biology Ch 10 Class 11

The simplest form in Kingdom Animalia belongs to:

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Eumetazoa

B) Bilateria

C) Protozoa

D) Parazoa

25 / 100

Category: Biology Ch 2 Class 12

The muscles attached to the bones are:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Voluntary and smooth

B) Involuntary and smooth

D) Involuntary and striated

C) Voluntary and striated

26 / 100

Category: Biology Ch 4 Class 12

In biennials and perennials, low temperature stimulus is not received by

Shoot apex of mature stem

Embryo of the seed

Leaves of the plants

None of the above

27 / 100

Category: Biology Ch 2 Class 11

Which of the following substance is most favorable to form structural component of biological membranes?

Hydrophilic Carbohydrates

Hydrophobic fats.

Both a and b

None of these

28 / 100

Category: Biology Ch 13 Class 11

Smaller the animals:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) More rate of respiration

B) Less the rate of respiration

C) Rate of respiration has nothing to do with the size of animal

D) None of these

29 / 100

Category: Biology Ch 7 Class 12

Gametes are produced by:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

A) Meiosis

B) Mitosis

C) None of these

D) Fission

30 / 100

Category: Biology Ch 12 Class 11

Fear of getting obese is termed as:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Bulimia nervosa

B) Anorexia nervosa

C) Dyspepsia

D) Obesity

31 / 100

Category: Biology Ch 6 Class 11

Which of the following is not a component of extracellular matrix in bacteria?

NUMS 2015
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cell wall

B) Slime

C) Capsule

D) Cell membrane

32 / 100

Category: Biology Ch 1 Class 12

Ureter open into the urinary bladder through:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Pelvis

C) Ureteral orifices

B) Hilus

D) Urethral orifices

33 / 100

Category: Biology Ch 4 Class 12

Treponema pallidum causes:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Syphilis

B) Gonorrhoea

C) AIDS

D) Herpes

34 / 100

Category: Biology Ch 12 Class 11

Absorption of digested food occurs mainly in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Colon

B) Small intestine

C) Large intestine

D) Stomach

35 / 100

Category: Biology

Q.40 Which statement is incorrect:

A. Syphilis is caused by Treponema pallidum

B. Genital herpes produces genital soreness and ulcers

C. Syphilis affects bones, eyes and CNS

D. Gonorrhea is a viral infection

36 / 100

Category: Biology Ch 7 Class 11

The disease caused by Protozoal infection is:

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Rickets

B) Goiter

C) Malaria

D) Beri-beri

37 / 100

Category: Biology Ch 4 Class 12

Development of an egg into zygote without fertilization is called

Parthenogenesis

Apomixes

Parthenocarpy

None of these

38 / 100

Category: Biology Ch 13 Class 11

Lungs are separated from abdominal cavity by a muscular sheath called:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Rib cage

C) Pericardium

D) Diaphragm

39 / 100

Category: Biology

Which organ(s) in the male reproductive system produce gametes?

NUMS Mock 4
Biology
Reproduction

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

40 / 100

Category: Biology

Q45 During birth which of following act as birth canal?

A. Oviduct

B. Ovary

C. Uterus

D. Vagina

41 / 100

Category: Biology Ch 6 Class 11

A Dutch scientist firstly observed very small creatures in

PMC Practice 6
Biology
Kingdom Prokaryote
Elimination Tool:

A) Vinegar

B) Saliva

C) Rain water

D) All of Above

42 / 100

Category: Biology Ch 5 Class 11

Which of the Euglenas (a Protoctista) character resembles that of animals:

They can move

They lack cell wall

They do not have chlorophyll

Both a and b

43 / 100

Category: Biology Ch 1 Class 11

A structure formed by groups of similar cells organized into loose sheetsor bundles performing similar functions is called as:

An organ

An organism

A Tissue

A Cell

44 / 100

Category: Biology

Q.18 The internal buds are known as which of the following?

A. Spicules

B. Choanocytes

C. Gemmules

D. Both A and B

45 / 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

46 / 100

Category: Biology Ch 4 Class 12

Which of these cycles operate in human females?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) Oestrous cycle

B) Menstrual cycle

C) Both Options A and B are correct

D) None of these options is correct

47 / 100

Category: Biology Ch 5 Class 11

DNA or RNA of viruses is enclosed in ______ coat:

Protein

Carbohydrate

Lipid

DNA

48 / 100

Category: Biology Ch 5 Class 11

What type of virus is the smallpox virus?

PMC Sample 1
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) DNA enveloped virus

B) RNA enveloped virus

C) DNA virus

D) RNA naked virus

49 / 100

Category: Biology Ch 7 Class 12

Mitotic apparatus in animals is formed by

Aster and spindle

Polar and kinetochore microtubules

Spindle and RNA

Spindle only

50 / 100

Category: Biology Ch 9 Class 12

Which of the following diseases CANNOT be cured by gene therapy?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) SCID

B) Tuberculosis

C) Cystic fibrosis

D) Cancer

51 / 100

Category: Biology Ch 2 Class 12

Ecdysone is

An enzyme that digest endocuticle during an arthropodal ecdysis.

A newly formed exoskeleton in authropods

A hormone that regulates moulting in arthropods.

A process that involves moulting.

52 / 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

53 / 100

Category: Biology Ch 3 Class 11

Inhibitors which block the enzyme by forming weak bond are called

Competitive inhibitors.

Non-competitive inhibitors

Irreversible inhibitors.

Both a and b

54 / 100

Category: Biology

Which of the following processes does NOT need Pyruvic Acid as a substrate?

NUMS Mock 2
Biology
Bioenergetics

A) Alcoholic fermentation

B) Calvin cycle

C) Aerobic respiration

D) Lactic Acid fermentation

55 / 100

Category: Biology Ch 9 Class 11

Ferns are included in

Psilopsida

Lycopsida

Sphenopsida

Pteropsida

56 / 100

Category: Biology Ch 5 Class 11

Genetically modified plants contain:

PMC Sample 2
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) No gene

B) No gene in transposition

C) Widely used in gene transfer

D) All of these options are correct

57 / 100

Category: Biology Ch 10 Class 11

Which one of the following coelenterate is also called the Portuguese man of war?

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Hydra

B) Velella

C) Obelia

D) Physalis

58 / 100

Category: Biology Ch 3 Class 12

Deficient production of hormones by adrenal glands results in: .

NTS 2011
Biology
Coordination and Control
Elimination Tool:

A) Cushing's syndrome

B) Addison's disease

C) Diabetes Mellitus

D) Goiter

59 / 100

Category: Biology Ch 2 Class 12

Exoskeleton of a marine snail is composed of

CaPO4

CaCO3

CaSO4

SiO2

60 / 100

Category: Biology Ch 12 Class 11

Parasites capable of living independently of its host at times is called as _______ parasite.

Obligate

Strict

Facultative

Endoparasite

61 / 100

Category: Biology Ch 10 Class 11

Both radial and bilateral symmetry is found in the phylum

Protozoa

Porifera

Echinodermata

None of these

62 / 100

Category: Biology Ch 1 Class 12

The place of attachment of leaf with the shoot is called:

Pith

Pit

Pulvinus

Ecdysone

63 / 100

Category: Biology Ch 1 Class 11

In animals coordination is achieved by means of

Respiratory system

Nervous system

Endocrine system

Both b and c

64 / 100

Category: Biology

Q.12 In enzymatic mechanism, the substrate bind to enzyme active site to produce?

A. Reactants

B. Enzyme

C. Products

D. all of these

65 / 100

Category: Biology Ch 13 Class 11

Breathing is considered as a:

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Chemical process

B) Biochemical process

C) Mechanical process

D) Both A and B

66 / 100

Category: Biology Ch 7 Class 11

Freshwater protozoans pump out excess water by a special structure called:

NUMS 2017
Biology
Kingdom Protista
Elimination Tool:

A) Oral groove

B) Contractile vacuole

C) Vesicle

D) Vacuole

67 / 100

Category: Biology Ch 6 Class 12

“Law of independent assortment” states:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) That each pair of alleles assort independently of other pairs of alleles during gamete formation

B) That alleles of each pair of contrasting trait have unequal probability to assort with the alleles of other pair

C) That the two coexisting alleles for each trait segregate (separate) from each other at meiosis so that each gamete receives only one of the two alleles

D) That pertain to inheritance of single trait (monohybrid cross)

68 / 100

Category: Biology Ch 12 Class 12

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

Littoral

Limnetic

Profundal

Benthic

69 / 100

Category: Biology Ch 4 Class 11

In a typical compound microscope the resolution is 2 μm. Which is about _____ that of naked eye.

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) 100 x

B) 300 x

C) 400 x

D) 500 x

70 / 100

Category: Biology Ch 14 Class 11

The causes of Cyanosis include:

NTS 2010
Biology
Transport
Elimination Tool:

A) Deficiency of vitamin C

B) Varicella-zoster virus

C) Degeneration of the cartilage of joints

D) Ventricular septum defect

71 / 100

Category: Biology Ch 11 Class 12

Study of a single population’s relationship to its environment is called

Ecology

Synecology

Autecology

Niche

72 / 100

Category: Biology Ch 11 Class 11

Chlorophyll is insoluble in:

Carbon tetrachloride

Alcohol

Organic solvents

Water

73 / 100

Category: Biology Ch 1 Class 12

The major portion of (NH)2CO is secreted by:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Sweat

B) Saliva

C) Urine

D) Stool

74 / 100

Category: Biology

Q.21 The spent energy in the form pf ADP is regeneratèd by mitochondria into which of the following forni?

A. AMP

B.ATP

C.ADP

D.All of these

75 / 100

Category: Biology Ch 4 Class 12

In which organism males are haploid

Aphids

Honey bee

Mosquito

Butterfly

76 / 100

Category: Biology Ch 4 Class 12

In asexual reproduction offspring are produced by which of the following?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) meiosis

B) mitosis

C) both a and b

D) none of these

77 / 100

Category: Biology

The hormone which controls the uptake of Sodium ions in kidney and its maintenance in blood plasma is:

NUMS Mock 2
Biology
Coordination and Control

A) Somatotrophic Hormone

B) Aldosterone Hormone

C) Gonadotrophic Hormone

D) Thyroxine Hormone

78 / 100

Category: Biology

Q.25 Which of the following is an example of a marine annelid?

A. Neries

B. Stylaria

C. Earthworm

D. Leech

79 / 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

80 / 100

Category: Biology

Q.38 The cell organelles involved, in some cases, with extra-cellular digestion

A. Golgi complex

B. Lysosomes

C. Peroxisomes

D. Glyoxysomes

81 / 100

Category: Biology Ch 5 Class 11

These viruses usually occur in two structural forms:

PMC Sample 2
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) HIV

B) HCV

C) Bacteriophage

D) COVID-19

82 / 100

Category: Biology Ch 8 Class 12

If a heterozygous individual shows the complete effect of both alleles, the type of inheritance would be

Complete dominance

Non dominance

Incomplete dominance

Co-Dominance

83 / 100

Category: Biology Ch 8 Class 12

Which of the following is monohybrid cross

TT x tt

TTYy x Ttyy

Both of these

None of these

84 / 100

Category: Biology

Q47 The T-lymphocytes and B-lymphocytes are the major cells of the:

A. Thymus

B. Lymph nodes

C. Adrenal glands

D. Lymphatic vessels

85 / 100

Category: Biology Ch 11 Class 12

Major regional ecological community of plants and animals forms

Biosphere

Biomass

Biomes

Bioecosystem

86 / 100

Category: Biology Ch 8 Class 12

In birds the male is the homogametic sex. A male bird showing the recessive trait was mated with a female showing the dominant trait of a characteristic governed by a pair of alleles which are sex-linked. What is the probability that the male offspring will show the dominant trait?

NTS 2014
Biology
Variation and Genetics
Elimination Tool:

A) 0

B) 0.25

C) 0.50

E) 1.00

87 / 100

Category: Biology

Q.18 Which of these is not a reflex action?

A, Secretion of sweat

B. salivation

C. Flexion due to needle prick

D. blinking of eyes due to strong light

88 / 100

Category: Biology Ch 2 Class 11

Reactions in which simple substances are combined to form complex substances are called:

Metabolic reactions

Catabolic reactions

Anabolic reactions

None of these

89 / 100

Category: Biology Ch 8 Class 12

In the pea plants, the factors round and yellow seeds (RRYY) is dominant over wrinkled and green seeds (rryy). Keeping this in mind, identify the seed that has the genotype round and green.

NTS 2011
Biology
Variation and Genetics
Elimination Tool:

A) Rryy

B) rrYy

C) RrYy

D) RRYy

90 / 100

Category: Biology Ch 9 Class 12

Which of the following characteristics makes plasmid DNA useful for researchers?:

PMC Practice 9
Biology
Biotechnology
Elimination Tool:

A) Readily incorporate cloned DNA

B) Capable of automatic replication

C) Capable of being isolated from genomic DNA

D) All of these

91 / 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

92 / 100

Category: Biology

Which substance might include this molecule?

NUMS Mock 4
Biology
Biological Molecules

A) Cellulose

B) Cholesterol

C) Glycerol

D) Insulin

93 / 100

Category: Biology Ch 4 Class 12

Fallopian tube in humans is important for:

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Ovulation

B) Primary oocyte

D) Ova

C) Secondary oocyte

94 / 100

Category: Biology

The region of the chromosome or, more specifically, the length of the DNA molecule, which has a particular function is called _______.

NUMS Mock 2
Biology
Chromosomes and DNA

A) Kinetochore

B) Locus

C) Allele

D) Gene

95 / 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.

96 / 100

Category: Biology Ch 3 Class 11

Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called

Cofactor

Coenzymes

Activator

Enzymes

97 / 100

Category: Biology

Q.60 Which of the following statements correctly describes how the host cell membrane is changed by viral replication?

A. Pores develop.

B. Glycocalyx layer is formed.

C. Membrane is resynthesized

D. Viral proteins are acquired

98 / 100

Category: Biology

Q.56 Which of the following movements are possible in pivot joint?

A. Flexion and extension

B. Adduction and abduction

C. Rotation

D. Extension flexion and rotation

99 / 100

Category: Biology Ch 8 Class 12

A cross between F1 hybrids and either of parents is called:

NUMS 2014
Biology
Variation and Genetics
Elimination Tool:

A) Back cross

B) Test cross

C) Reverse cross

D) None of the above

100 / 100

Category: Biology Ch 10 Class 12

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

NTS 2014
Biology
Evolution
Elimination Tool:

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

Your score is

The average score is 61%

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