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

Bones of the skull are joined by:

NUMS Mock 2
Biology
Support and Movement

A) Fixed joints

B) Sliding joints

C) Pivot joints

D) Hinge joints

2 / 100

Category: Biology Ch 4 Class 11

Protein layers which are NOT continuous on the surface make ________ percent of total in plasma membrane.

NUMS 2019 Cancelled
Biology
Cell Structure and Function
Elimination Tool:

A) 50 – 60

B) 60 – 70

C) 60 – 80

D) 70 – 80

3 / 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

4 / 100

Category: Biology Ch 8 Class 12

Pick the correct option about Drosophila.

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

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

5 / 100

Category: Biology Ch 3 Class 12

Which brain portion is responsible for controlling body coordination?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Medulla

B) Amygdala

C) Cerebellum

D) Pons

6 / 100

Category: Biology Ch 5 Class 11

Those organisms which can prepare their own food from simple inorganic material and can store energy are called

Autotrophs

Heterotrophs

Procariotique

Eu-cariotique

7 / 100

Category: Biology Ch 8 Class 11

An association between two organisms benefiting both is called

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Commensalism

B) Parasitism

C) Predation

D) Symbiosis

8 / 100

Category: Biology Ch 7 Class 11

_______ infection is caused by a viroid:

NUMS 2020
Biology
Kingdom Protista
Elimination Tool:

A) Hepatitis A

B) Hepatitis D

D) Mysterious brain infection

C) Mad Cow disease

9 / 100

Category: Biology Ch 10 Class 12

Choose the correct combination:

NUMS 2019 Cancelled
Biology
Evolution
Elimination Tool:

A) Darwin – survival of the fittest

B) Darwin – no extinction

C) Lamarck – acquired transmission

D) Both Darwin – survival of the fittest and Lamark – acquired transmission

10 / 100

Category: Biology

Q.39 If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules?

A.5

B.6

C.7

D. 8

11 / 100

Category: Biology Ch 3 Class 12

On land, frogs are:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Hypermetric

B) Cerebral cortex

C) Normal sighted

D) None of these

12 / 100

Category: Biology Ch 4 Class 11

Who coined the term CELL?

Schwann

Schleiden

Robert Hook

Both a and b

13 / 100

Category: Biology Ch 13 Class 11

Vocal cords are stretched across

Larynx

Pharynx

Golttis

None of these

14 / 100

Category: Biology Ch 10 Class 11

Leptocardii is a group of:

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Urochordata

B) Cephalochordata

C) Vertebrata

D) Mollusca

15 / 100

Category: Biology Ch 7 Class 12

In which stage of meiotic division centromere divides?

NUMS 2017
Biology
Cell Cycle
Elimination Tool:

A) Anaphase I

B) Anaphase II

C) Metaphase II

D) Both A and B

16 / 100

Category: Biology

Q.65 How are flat worms not similar to round worms?

A. They are both acoelomates

B. They are both triploblastic.

C. They both show bilateral symmetry.

D. They are both worms.

17 / 100

Category: Biology Ch 6 Class 12

What would be the number of nucleotides for a protein molecule of about 142 amino acids?

NUMS 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) 430

B) 142

C) 426

D) 460

18 / 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

19 / 100

Category: Biology Ch 9 Class 11

Such inflorescence in which the main axis is elongated and bears sessile flowers is called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Raceme

C) Cyme

B) Spike

D) Panicle

20 / 100

Category: Biology Ch 5 Class 12

In plants growth is of

Four types

Five types

One type

Two types

21 / 100

Category: Biology Ch 4 Class 11

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called

Active transport

Passive transport

Co-transport

Counter transport

22 / 100

Category: Biology Ch 6 Class 11

Which of the following structure is not present in all the bacteria?

Cell membrane

Chromatin bodies

Ribosomes

Capsule

23 / 100

Category: Biology Ch 13 Class 11

Which one of the following is a genetic disorder in which abnormally thick mucus is produced in the lungs and other parts of the body?

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Lung cancer

B) Chronic bronchitis

C) Cystic fibrosis

D) Emphysema

24 / 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

25 / 100

Category: Biology

Q.14 Aschelminthes is also known as which of the following?

A. Protozoans

B. Eumetazoa

C. Protoctist ancestors

D. Nematodes

26 / 100

Category: Biology Ch 12 Class 12

Development of bark in plants and skin in animals is a method for

Providing support

Protection from enemies

Reducing water loss

Helping in food production

27 / 100

Category: Biology Ch 4 Class 12

Referring to sexual reproduction, humans are:

NTS 2018
Biology
Reproduction
Elimination Tool:

A) Hermaphrodites

B) Vivaparous

C) Oviparous

D) Self-fertilized

28 / 100

Category: Biology Ch 5 Class 12

Sertoli cells

Provide liquid medium to cells in testes

Provide protection and nourishment to cells

Secrete testosterone

Both a and b

29 / 100

Category: Biology Ch 4 Class 12

Which one is not a day neutral plant?

Cucumber

Maize

Cotton

Tobacco

30 / 100

Category: Biology Ch 4 Class 12

Seeds are dormant in conditions of

Water scarcity

Low temperature

Harsh winters

All of these

31 / 100

Category: Biology Ch 8 Class 12

Two animals are mated. One is homozygous dominant for one character and homozygous recessive for another. The other animal Is heterozygous for both characters. How many phenotypes are expected in the offspring of this cross?

NTS 2016 DUHS & JSMU
Biology
Variation and Genetics
Elimination Tool:

A) 1

B) 2

C) 3

D) 4

32 / 100

Category: Biology Ch 6 Class 12

Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Single ; two

B) Single ; three

C) Triplet ; two

D) Triplet ; three

33 / 100

Category: Biology Ch 13 Class 12

Overgrazing results in:

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

A) Totally barren lands

B) Good pastured lands

C) Salinity

D) Rocky areas

34 / 100

Category: Biology Ch 13 Class 11

The glycolate produced diffuses into the membrane bounded organelles called

Glyoxisomes

Peroxisomes

Lysosomes

Mitochondria

35 / 100

Category: Biology

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

A. Smallpox

Mumps

C. Tetanus

D. Cowpox

36 / 100

Category: Biology Ch 4 Class 11

Resolution power of a compound microscope is

2.0 ?m

2-4 A

24 ?m

24 A

37 / 100

Category: Biology Ch 2 Class 12

The multinucleated mass of the bone-breaking cells is called:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Osteoclasts

B) Osteoblasts

C) Osteogenesis

D) Osteocytes

38 / 100

Category: Biology Ch 9 Class 12

Enzyme used by the Bacteria to cut the DNA of the invading Virus for its protection is:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction Exonuclease

B) Restriction Ligase

C) Restriction Endonuclease

D) DNA polymerase

39 / 100

Category: Biology Ch 7 Class 11

Plasmodium belongs to

Ciliates

Apicomplexans

Actinopods

Foraminferans

40 / 100

Category: Biology Ch 2 Class 12

Pivot joint exists between

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Tibia and fibula

C) Humerus and scapula

B) Humerus and ulna

D) Ulna and radius

41 / 100

Category: Biology Ch 14 Class 11

Atherosclerosis is disease of:

NTS 2016 SMBBMC
Biology
Transport
Elimination Tool:

A) Immune system

B) Arterial wall

C) Venal wall

D) Lungs

42 / 100

Category: Biology Ch 8 Class 12

Haemophilia occurs because of:

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) Mutation in an autosome

B) Mutation of Y-chromosome

C) Mutation of X-chromosome

D) Deficiency of iron

43 / 100

Category: Biology Ch 3 Class 12

The directional movement toward or away from the stimulus is called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Tropism

B) Orientation

C) Taxi

D) Non orientation

44 / 100

Category: Biology Ch 7 Class 12

During interphase of the cell cycle, which of the following stage is for duplication of DNA:

NUMS 2019 Reconduct
Biology
Cell Cycle
Elimination Tool:

A) G0 phase

B) G1 phase

D) S phase

C) G2phase

45 / 100

Category: Biology

The diagram represents two liquids, separated by a membrane through which osmosis can occur.

What movement of molecules will occur?

NUMS Mock 3
Biology
Transport

A) Molecules of dissolved substance move from left to right.

B) Molecules of dissolved substance move from right to left.

C) Overall, water molecules move from left to right.

D) Overall, water molecules move from right to left.

46 / 100

Category: Biology Ch 7 Class 12

Reverse of prophase is

Interphase

Metaphase

Anaphase

Telophase

47 / 100

Category: Biology Ch 5 Class 11

Amoeba belongs to which kingdom:

Prokaryotae

Plantae

Monera

Protista

48 / 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

49 / 100

Category: Biology

Q.27 During which of the following levels of biological organization can natural selection occur?

A. Gene

B. Individual

C. Group

D. All of these

50 / 100

Category: Biology Ch 9 Class 11

In bryophytes fertilization takes place in

Antheridia

Archegonia

water

Ovule

51 / 100

Category: Biology Ch 8 Class 12

The disease, which is caused by defect in a single gene or pair of genes is referred to as:

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) Unifactorial

B) Multifactorial

C) Down syndrome

D) Turner syndrome

52 / 100

Category: Biology Ch 11 Class 12

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

53 / 100

Category: Biology Ch 1 Class 12

Negative feedback mechanism is the characteristic of which class?

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Class Fish

B) Class Amphibia

C) Class Reptilia

D) Class Mammalia

54 / 100

Category: Biology Ch 13 Class 12

Study of human population and things that affect them is

Ecology

Demography

Demology

Environment

55 / 100

Category: Biology Ch 11 Class 11

Molecular formula of chlorophyll ‘a’ molecule is:

C55H72O5N4Mg

C55H70O6N4Mg

C50H72O6N4Mg

C55H70O5N4Mg

56 / 100

Category: Biology Ch 9 Class 11

Ferns are included in

Psilopsida

Lycopsida

Sphenopsida

Pteropsida

57 / 100

Category: Biology

Q.12 The least stable RNA present in the cell is:

tRNA

mRNA

rRNA

Micro RNA

58 / 100

Category: Biology Ch 1 Class 12

In humans, the temperature regulation control center is located in:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Kidneys

B) Brain

C) Lungs

D) Liver

59 / 100

Category: Biology Ch 12 Class 11

In planaria, numerous small branches which end blindly are called as

Digestive tract

Intestinal caeca

Hepatic caeca

Both B & C

60 / 100

Category: Biology Ch 7 Class 12

Period between two consecutive divisions is called

Interphase

Resting phase

Mitotic phase

Cell cycle

61 / 100

Category: Biology Ch 11 Class 12

Mosses are

Dermatocarpon

Permellia

Tortula

Both b and c

62 / 100

Category: Biology Ch 11 Class 12

Abiotic components include

Atmosphere

Hydrosphere

Lithosphere

All of these

63 / 100

Category: Biology Ch 6 Class 12

The total of all the alleles in a population is called a:

NUMS 2014
Biology
Chromosomes and DNA
Elimination Tool:

A) Genetic drift

B) Genotype

C) Gene pool

D) Gene mutation

64 / 100

Category: Biology Ch 13 Class 12

In air nitrogen is

57%

20%

79%

30%

65 / 100

Category: Biology Ch 12 Class 11

Scurvy is caused by deficiency of vitamin ______.

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

A) A

B) B

C) C

D) D

66 / 100

Category: Biology

Q.54 Which of the following elements are not found in carbohydrates?

A.C

B.H

C.N

D. O

67 / 100

Category: Biology Ch 12 Class 11

Food is assimilated into the body from digestive tract in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Esophagus

B) Stomach

C) Small intestine

D) Rectum

68 / 100

Category: Biology Ch 9 Class 12

Choose the term from the following which is NOT a part of gene therapy?

NTS 2019
Biology
Biotechnology
Elimination Tool:

A) Bone marrow transplant

B) Retrovirus

C) DNA Fingerprinting

D) Somatic cells

69 / 100

Category: Biology Ch 4 Class 11

_______ is involved in lipid synthesis/metabolism.

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Smooth endoplasmic reticulum

B) Rough endoplasmic reticulum

C) Mitochondria

D) Vacuoles

70 / 100

Category: Biology Ch 2 Class 11

5 different amino acids, numbered 1, 2, 3, 4, and 5, below from the following sequence in the path of a polypeptide chain:

1-2-3-4-2-5-3

Messenger RNA codon, which correspond to the amino acids, are:
amino acid 1 UGU

amino acid 2 GAU

amino acid 3 CAC

amino acid 4 UAG

amino acid 5 AAG

Which one of the following DNA bases sequences could provide the code for the given section of the polypeptide?

NTS 2015 DUHS and JSMU
Biology
Biological Molecules
Elimination Tool:

A) ACACTTGTGATGCTATTCGTG

B) ACACUAGUGAUGCUAUUCGUG

C) ACACTAGTGATGCTAAACGTG

D) ACACTAGTGATCCTATTCGTG

71 / 100

Category: Biology

Q.8 How many carbon atoms contribute to form glucopyranose?

72 / 100

Category: Biology Ch 8 Class 11

The most common example of members of the kingdom fungi is/are:

NUMS 2019 Reconduct
Biology
Kingdom Fungi
Elimination Tool:

A) Star fish

B) Mushrooms

C) Algae

D) Human

73 / 100

Category: Biology Ch 9 Class 11

Gymnosperms are referred to as “naked seeded plants”, because

NUMS 2016
Biology
Kingdom Plantae
Elimination Tool:

A) They lack ovule

B) They lack ovaries

C) The embryo is unprotected

D) They have no seed coat

74 / 100

Category: Biology Ch 7 Class 12

During the G2 phase:

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) Chromosome number is duplicated

B) The chromosomes are left with only one chromatid

C) Energy is stored for Chromosome movement and mitotic specific proteins(Tubulin) are produced

D) Specific enzymes are synthesized and DNA base units are accumulated

75 / 100

Category: Biology

Q.66 Which one of the following is a non-protein group covalently bonded to a few respiratory enzymes among others?

A. Nicotine adenine dinucleotide

B. Flavin adenine dinucleotide

C. Nicotinamide adenine dinucleotide phosphate

D. All of the above

76 / 100

Category: Biology

Q.52 The patellar reflex and the Achilles reflex are examples of:

A. Monosynaptic reflex

B. Polysynaptic reflex

C. Hemi Synaptic reflex

D. Both A and B

77 / 100

Category: Biology Ch 11 Class 11

In the Krebs cycle, substrate-level phosphorylation accompanies the formation of:

NTS 2013
Biology
Bioenergetics
Elimination Tool:

A) Citrate

B) Alpha-ketoglutarate

C) Succinate

D) Fumarate

78 / 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

79 / 100

Category: Biology Ch 12 Class 11

Of the following, which one is missing in herbivores?

Premolars

Canines

Incisors

Molars

80 / 100

Category: Biology

Q.63 Ozone depletion is commonly caused by:

A. CFC’s

B. Industrial smoke

C. Nitrogen gases

D. Green house gases

81 / 100

Category: Biology

Q.50 Which of the following hormones is essential for the production of sperms?

A. LH
B. Estrogen
C. Gonadotrophin hormones
D. Testosterone

A. LH

B. Estrogen

C. Gonadotrophin hormones

D. Testosterone

82 / 100

Category: Biology Ch 11 Class 11

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Respiration

83 / 100

Category: Biology Ch 2 Class 11

Peptide bonds are formed between:

NUMS 2014
Biology
Biological Molecules
Elimination Tool:

A) Hydrogen groups of adjacent amino acids

B) Non-functional groups of the amino acids

C) Carboxyl groups and amino groups

D) Functional groups and hydrogen groups of adjacent amino acids

84 / 100

Category: Biology Ch 8 Class 11

Fungi do not contain:

NTS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Cell wall

C) Chlorophyll

B) Hyphae

D) Mycelium

85 / 100

Category: Biology Ch 7 Class 12

Exchange of segments between homologous chromosomes is called:

UHS 2012
Biology
Cell Cycle
Elimination Tool:

A) Segregation

B) Independent assortment

C) Crossing over

D) Mutation

86 / 100

Category: Biology Ch 5 Class 12

The condition due to loss of appetite for food is termed as:

NTS 2016 DUHS & JSMU
Biology
Growth and Development
Elimination Tool:

A) Anorexia nervosa

B) Bulimia nervosa

C) Colour blindness

D) Retarded growth

87 / 100

Category: Biology Ch 10 Class 12

Modification in the organization of the basic pentadactyl limb structure found in vertebrates provides good evidence for the principle of:

NUMS 2020
Biology
Evolution
Elimination Tool:

A) Adaptive radiation

B) Convergent evolution

C) Genetic drift

D) Inheritance of acquired characters

88 / 100

Category: Biology

Q.41 The period during which a girl sexually matures is called

A. Menstrual cycle

B. Puberty

C. Childhood

D. Teens

89 / 100

Category: Biology Ch 9 Class 11

The flower of family gramineae process contain two scales below ovary which are called:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Glumes

B) Lemma and palea

C) Lodicule

D) Rochella

90 / 100

Category: Biology Ch 7 Class 12

Smooth endoplasmic reticulum is responsible for the metabolism of:

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) Nucleic acids

B) Proteins

C) Carbohydrates

D) Lipids

91 / 100

Category: Biology

While working in a laboratory, before studying a sample under the microscope, it was immersed in a dye solution to obtain ______.

NUMS Mock 1
Biology
Biology and its Major Fields of Specialization

A) Magnification

B) Image

C) Match

D) Contrast

92 / 100

Category: Biology

Which of the following will not undergo aldol condensation?

NUMS Mock 2
Chemistry
Aldehydes and Ketones

A) Acetaldehyde

B) Propanaldehyde

C) Benzaldehyde

D) Trideuteroacetaldehyde

93 / 100

Category: Biology Ch 13 Class 12

Flow of energy in an ecosystem is:

NUMS 2014
Biology
Man and His Environment
Elimination Tool:

A) Unidirectional

B) Tridirectional

C) Multidirectional

D) Bidirectional

94 / 100

Category: Biology Ch 5 Class 12

The most abundant organic molecule on the planet earth is:

NUMS 2016
Biology
Growth and Development
Elimination Tool:

A) Starch

B) Glycogen

C) Glucose

D) Cellulose

95 / 100

Category: Biology Ch 6 Class 11

In which phase of bacterial growth, does divison at an exponential rate occur?

NUMS 2020
Biology
Kingdom Prokaryote
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Decline phase

96 / 100

Category: Biology

Q.32 In the ascent of sap, water moves up in:

A. Xylem

B. Cambium

C. Phloem

D. Endodermis

97 / 100

Category: Biology Ch 12 Class 11

Digestive system in vertebrates is formed by which germ layer?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Ectoderm

B) Endoderm

C) Mesoderm

D) None of these

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 12 Class 11

Secretion of pancreatic juice is stimulated by:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Secretin

B) Gastrin

C) Pepsinogen

D) Both secretin and gastrin

100 / 100

Category: Biology Ch 3 Class 11

The lock and key model of enzyme action was proposed by:

PMC Sample 3
Biology
Enzymes
Elimination Tool:

A) Louis Pasteur

B) Emil Fischer

C) Daniel Koshland

D) Urey Miller

Your score is

The average score is 61%

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