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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Biology Practice Test 2

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1 / 100

Category: Biology

A man who has type AB blood cannot father a child with type ___ blood, because he would pass on either the ___ or the B allele to all of his offspring.

NUMS Mock 4
Biology
Variation and Genetics

A) A,O

B) O,A

C) B, O

D) B, A

2 / 100

Category: Biology Ch 4 Class 11

Chief material present in the cell wall of plants, fungal, and prokaryotic cells is:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Proteins

B) Lipids

C) Polysaccharides

D) Phospholipids

3 / 100

Category: Biology Ch 6 Class 11

The cell wall of Archaebacteria does not contain which of the following?

PMC Sample 1
Biology
Kingdom Prokaryote
Elimination Tool:

A) Glycoproteins

B) Polysaccharides

C) Proteins

D) Peptidoglycan

4 / 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

5 / 100

Category: Biology

Q.68 A person was married to his cousin and both are heterozygous for sickle cell anemia. Among their four kids, what will be proportion of affected homozygotes?

A. 50%

B. 25%

C. 75%

D. 100%

6 / 100

Category: Biology Ch 8 Class 12

The position of a gene on chromosome is called

Habitat

Position

Locus

Location

7 / 100

Category: Biology Ch 4 Class 11

Which of the following is NOT the function of cell membranes?

NTS 2018
Biology
Cell Structure and Function
Elimination Tool:

A) Protection of cytoplasm

B) Regulating the passage of different molecules

C) Protein synthesis

D) Cellular communication

8 / 100

Category: Biology Ch 4 Class 12

Male and female sea urchins release their sperm and eggs Into the water where fertilization takes place. How can their reproduction be described?

NTS 2013
Biology
Reproduction
Elimination Tool:

A) asexual reproduction which results in genetically dissimilar offspring

B) asexual reproductlon whlch results In genetically identical offspring

C) Sexual reproduction which results in genetically dissimilar offspring

D) Sexual reproduction which results in genetically identical offspring

9 / 100

Category: Biology Ch 7 Class 12

Meiosis occur in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

10 / 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

11 / 100

Category: Biology

Q.47 Which of the following are believed to have common origin with annelids?

A. Nematodes

B. Arthropods

C. Molluses

D. None of these

12 / 100

Category: Biology Ch 5 Class 11

Bacteriophages, or phages are also known as:

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

A) Bacteria facilitator

B) Bacteria eater

C) Animal viruses

D) Plant viruse

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 Ch 10 Class 12

Which of the following scientists contributed a lot to “modern synthetic theory of organic evolution:

NUMS 2014
Biology
Evolution
Elimination Tool:

A) Theodosius Dobzhansky 1937

B) Fischer 1958

C) Wright 1968

D) All of above

15 / 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

16 / 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

17 / 100

Category: Biology Ch 4 Class 11

The most abundant organic compounds in a mammalian cell are:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Water

B) Lipids

C) Carbohydrates

D) Proteins

18 / 100

Category: Biology Ch 3 Class 12

Which type of sensory structures carry deep pressure and vibration sensations?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

none of these.

19 / 100

Category: Biology Ch 4 Class 11

Whone is not the function of endoplasmic reticulum?

Nerve impulse conduction

Transport of material

Mechanical support

Synthesis of conjugated molecules

20 / 100

Category: Biology

Q.50 The cluster of pouches opened from alveolar ducts is known as

A. Bronchi

B. Bronchioles

C. Pharynx duct

D. Alveoli

21 / 100

Category: Biology Ch 7 Class 12

Meiosis occurs at the time of

Gamete formation in animals

Spore formattion in plants

Growth in animals

Both a and b

22 / 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

23 / 100

Category: Biology

Q.16 Example of convergent evolution is

A. Forelimbs of man and bat

B. Wings of birds and insects

C. Darwin's finches

D. All of above

24 / 100

Category: Biology Ch 7 Class 12

In gametogenesis, which resultant product is non-functional?

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Spermatogonia

B) Oogonia

C) Polar body

D) Ovum

25 / 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

26 / 100

Category: Biology Ch 10 Class 12

Which factor decides what type of variation should be flourished and passed on to the next generations?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Species

B) Population

C) Survival

D) Environment

27 / 100

Category: Biology

Which of the following organelles are present in all the bacteria?

NUMS Mock 1
Biology
Kingdom Prokaryote

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

28 / 100

Category: Biology Ch 3 Class 11

Restriction endonucleases

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) are bacterial enzyme

B) convert RNA to DNA

C) hydrolyze protein into amino acids

D) get mutated for DNA repair

29 / 100

Category: Biology Ch 1 Class 12

The concentration of Na ions in the body fluids is controlled by the ____ hormone.

NTS 2012
Biology
Homeostasis
Elimination Tool:

A) ADH

B) Parathormone

C) Aldosterone

D) Estrogen

30 / 100

Category: Biology Ch 5 Class 11

There are 3 stages of HIV infection, which sequence is correct

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

A) AIDS, Chronic HIV, Acute HIV

B) Chronic HIV, AIDS, Acute HIV

C) Acute HIV, Chronic HIV, AIDS

D) all of them

31 / 100

Category: Biology Ch 3 Class 11

Enzymes _________ the activation energy of a chemical reaction

Increases

Decreases

Does not effect

Increases or decreases depending upon individual enzyme

32 / 100

Category: Biology Ch 11 Class 11

Estimating relative CO2consumption or O2release during photosynthesis at different wavelengths of light, is termed as:

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Action spectrum

B) Absorption spectrum

C) Dark reaction

D) Light reaction

33 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

Plant

Fungus

Animal

Algae

34 / 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

35 / 100

Category: Biology Ch 8 Class 12

Filial is a Latin word. It means

Spring

Issue

Progeny

Descendent

36 / 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

37 / 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

38 / 100

Category: Biology

Male and female sea urchins release their sperm and eggs into the water where fertilization takes place. How can their reproduction be described?

NUMS Mock 3
Biology
Reproduction

A) Asexual reproduction which results in genetically dissimilar offsprings

B) Asexual reproduction which results in genetically identical offsprings

C) Sexual reproduction which results in genetically dissimilar offsprings

D) Sexual reproduction which results in genetically identical offsprings

39 / 100

Category: Biology

Q.47 The chemical nature of oxytocin is:

A. Protein

B. Amino acid derivative

C. Polypeptide

D. Steroid Incorrect

40 / 100

Category: Biology

Nitrogen-cycle is facilitated by ______.

NUMS Mock 3
Biology
Ecosystem

A) Algae

B) Fungi

C) Bacteria

D) Virus

41 / 100

Category: Biology

Q.67 The animals which belong to division Radiata is/are?

A. Triploblastic

B. Diploblastic

C. Radio blast

D. All of these

42 / 100

Category: Biology Ch 12 Class 12

Which statement about hydrospheric ecosystem is incorrect?

Salt water ocean and sea are the largest ecosystems on earth

Salt water ecosystem covers about 75% earth surface

Fresh water ecosystem covers less than 1% of earth surface

It temperature is more moderate to support life

43 / 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

44 / 100

Category: Biology Ch 5 Class 11

Recent studies on HIV reveal that the virus infects and multiplies in _____ but does NOT cause disease in them.

NUMS 2019 Reconduct
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Monkeys

B) Cats

C) Horses

D) Dogs

45 / 100

Category: Biology

The RNA found in Ribosomes is:

NUMS Mock 1
Biology
Chromosomes and DNA

A) mRNA

B) rRNA

C) tRNA

D) Polysome

46 / 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

47 / 100

Category: Biology Ch 2 Class 11

Each β – chain of hemoglobin molecules contains ____ amino acids.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 136

B) 146

D) 288

C) 235

48 / 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

49 / 100

Category: Biology Ch 1 Class 11

The study of fossils is called:

Environmental Biology

Historical biology

Palaeontology

Social biology

50 / 100

Category: Biology Ch 8 Class 11

Which of the following fungi is utilized in the baking industry?

NTS 2011
Biology
Kingdom Fungi
Elimination Tool:

A) Mushrooms

B) Yeast

C) Bread mold

D) Penicillium

51 / 100

Category: Biology

The type of plastids found in roots of plants are _____.

NUMS Mock 4
Biology
Cell Structure and Function

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) All of these options are correct

52 / 100

Category: Biology

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

A.C

B.H

C.N

D. O

53 / 100

Category: Biology Ch 13 Class 11

Vocal cords, which help in voice production are two thin edged fibrous bands, present in:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Glottis

B) Bronchus

C) Larynx

D) Trachea

54 / 100

Category: Biology Ch 5 Class 11

Viruses resemble living things because they:

NTS 2017
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Circulate

B) Move

C) Reproduce

D) Are crystalline

55 / 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

56 / 100

Category: Biology Ch 8 Class 12

The gene which controls ABO group has how many alleles in an individual

One

Two

Three

Four

57 / 100

Category: Biology Ch 4 Class 11

The cell membrane surrounds the:

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Nucleoplasm

B) Cell wall

C) Protoplasm

D) None of the above

58 / 100

Category: Biology Ch 10 Class 11

Which vertebrate groups have scaly skin?

NTS 2013
Biology
Kingdom Animalia
Elimination Tool:

A) amphibians and fish

B) amphibians and mammals

C) fish and mammals

D) fish and reptiles

59 / 100

Category: Biology Ch 13 Class 11

Booklungs serve the function of respiration in:

NTS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Scorpion

B) Earthworm

C) Frog

D) Cockroaches

60 / 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

61 / 100

Category: Biology

Carbon dioxide joins the photosynthetic pathway at:

NUMS Mock 1
Biology
Bioenergetics

A) PSI

B) PSII

C) Light reaction

D) Dark reaction

62 / 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

63 / 100

Category: Biology Ch 8 Class 11

Antibiotics are produced by fungi and certain bacteria of group:

UHS 2013
Biology
Kingdom Fungi
Elimination Tool:

A) Actinomycetes

B) Oomycetes

C) Ascomycetes

D) Basidiomycetes

64 / 100

Category: Biology Ch 10 Class 11

A characteristics features of Echinoderm is:

NTS 2011
Biology
Kingdom Animalia
Elimination Tool:

A) Canal system

B) Water vascular system

C) Tracheal system

D) Blood vascular system

65 / 100

Category: Biology

A/An ______ is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation if oxygen is absent.

NUMS Mock 4
Biology
Nutrition

A) Cellular anaerobe

B) Respiratory anaerobe

C) Obligate anaerobe

D) Facultative anaerobe

66 / 100

Category: Biology Ch 7 Class 11

Of the following which one has glassy shells?

Radiolarians

Forams

Both of these

None of these

67 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called

Mildew

Constricting ring

Haustoria

All of thes

68 / 100

Category: Biology Ch 13 Class 11

When abdomen expands, the number of spiracles open is

69 / 100

Category: Biology Ch 6 Class 12

Transcription is the process in which an RNA copy of the DNA sequence and coding the gene is produced with the help of an enzyme called:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA polymerase

B) RNA polymerase

C) DNA transcriptase

D) RNA transcriptase

70 / 100

Category: Biology Ch 7 Class 11

The nucleoid is found only in certain species of:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Gram positive bacteria

B) Both gram positive and gram negative bacteria

C) Gram negative bacteria

D) All bacteria

71 / 100

Category: Biology Ch 9 Class 11

Thick, waxy & leathery cuticle around leaves is present in which of the following?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

D) Xerophytes

C) Halophytes

72 / 100

Category: Biology Ch 5 Class 11

The shape of the tobacco mosaic virus is:

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

A) Spring shape

B) Rod shape

C) Comma shape

D) Spherical shape

73 / 100

Category: Biology Ch 1 Class 11

Different species of plants and animals living in the same habitat is called :

Population

Community

Biome

74 / 100

Category: Biology

Q.24 Pepsinogen is produce by:

A. Mucous cells

B. Zymogen cells

C. Parietal cells

D. None of these

75 / 100

Category: Biology Ch 12 Class 11

Earthworm is an example of ______ feeder

Detritus

Fluid

Macrophageus

Filter

76 / 100

Category: Biology Ch 7 Class 11

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

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Death / Decline phase

77 / 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

78 / 100

Category: Biology Ch 5 Class 12

Vegetative roots and shoots grow by

Determinate growth

Primary growth only

Indeterminate growth

None of these

79 / 100

Category: Biology Ch 4 Class 12

Which disorder among the following CANNOT be detected by amniocentesis?..

NTS 2019
Biology
Reproduction
Elimination Tool:

A) Haemophilia

B) Heart defects

D) Cystic fibrosis

C) Tay-Sachs disease

80 / 100

Category: Biology Ch 3 Class 11

Enzymes work by which of the following?

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) Increasing the activation energy

B) Reducing the activation energy

C) Making exergonic reactions endergonic

D) Making endergonic reactions exergonic

81 / 100

Category: Biology Ch 2 Class 12

Select a sessile zooflagellate:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Trichonympha

B) Trypanosoma

C) Choanoflagellate

D) Euglena

82 / 100

Category: Biology Ch 12 Class 11

Deficiency of K+ causes:

Stunted growth & strong chlorosis

No electron transport chains

Premature death of leaves.

Stunted growth of roots.

83 / 100

Category: Biology Ch 8 Class 12

The trait “Kernel colour in corn” in controlled by how many pairs of genes

One pair

Two pairs

Three pairs

Many pairs

84 / 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

85 / 100

Category: Biology

Q.53____________________are among smallest known virus

A. Picornavirus

B. Parvoviruses

C. Herpes virus

D. Rotavirus

86 / 100

Category: Biology Ch 6 Class 11

Which of the following is TRUE about the structure of a typical bacterium?

PMC 2020
Biology
Kingdom Prokaryote
Elimination Tool:

A) It has cell wall

B) It has cytoplasm

C) It has genetic material

D) All of the above

87 / 100

Category: Biology Ch 1 Class 12

In animals excess of nitrogen is excreted primarily in form of

Creatinine

Trimethyamine oxide

Pyrimidine

Ammonia

88 / 100

Category: Biology

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

A. Protozoans

B. Eumetazoa

C. Protoctist ancestors

D. Nematodes

89 / 100

Category: Biology

Q.2 Prokaryotic and eukaryotic cells generally have which of the following features in common?

A. Cell wall made of cellulose

B. Presence of linear chromosome

C. Presence of ribosomes

D. Presence of nucleus

90 / 100

Category: Biology Ch 3 Class 11

Identify the wrong statements.

(a) The substrate binds to active site of enzyme and not fitting into active site

(b) The binding of substrate induces the enzyme to alter its shape

(d) The enzyme releases the products of the reaction and runs through catalytic cycle once again

NUMS 2019 Reconduct
Biology
Enzymes
Elimination Tool:

A) A, C

B) B, D

C) B, C

D) A, D

91 / 100

Category: Biology Ch 2 Class 11

Which bond provides stability to complex carbohydrate molecules?

C-H

C-O

C-C

C-N

92 / 100

Category: Biology

Q.8 The neurons responsible for everything various external stimuli that come from the environment into corresponding internal stimuli is called:

A. Motor nerve

B. Sensory nerve

C. Both A and B

D. Mixed nerve

93 / 100

Category: Biology Ch 8 Class 12

An Rh negative woman is married to an Rh positive man whose father was also Rh negative. What are the chances that their child will be affected?

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) 25%

B) 50%

C) 75%

D) 100%

94 / 100

Category: Biology Ch 9 Class 11

Plants of this group are called ferns:

NUMS 2017
Biology
Kingdom Plantae
Elimination Tool:

A) Filicinae

B) Angiospermae

C) Gymnospermae

D) All of them

95 / 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

96 / 100

Category: Biology Ch 2 Class 11

Mono-saccharides have a general formula represented by:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) (CH2O)n

B) C(H2O)n

C) C2(H2O)n

D) C2(H2O)n

97 / 100

Category: Biology Ch 5 Class 12

The fate of each blastomere is foretold. What will that cleavage be?

PMC Sample 2
Biology
Growth and Development
Elimination Tool:

A) Spiral and indeterminate

B) Radial and determinate

C) Radial and indeterminate

D) Spiral and determinate

98 / 100

Category: Biology Ch 13 Class 11

Gaseous exchange in plants takes place through the:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Stomata

B) Mesophyll

C) Endoderm

D) Xylem

99 / 100

Category: Biology Ch 11 Class 11

The oxidation of PGAL during glycolysis yields ____ molecules.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) ATP

B) FAD

C) FADH

D) ADP

100 / 100

Category: Biology Ch 8 Class 12

Phenotype for both TT and Tt is tall, so the allele T is known as:

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) Dominant

B) Recessive

C) Homozygous

D) Heterozygous

Your score is

The average score is 57%

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