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 Ch 10 Class 11

An amphibian’s heart has ______ chambers:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Two

B) Three

C) Four

D) Five

2 / 100

Category: Biology Ch 2 Class 11

Which one are most complex sugar:

Monosaccharides

Oligosaccharides

Polysaccharides

None of these

3 / 100

Category: Biology Ch 3 Class 12

Na+ -K+ ATPase pump is important for:

Maintenance of resting potential.

Massive out flux of K+ after depolarization.

Recovery of resting potential.

Conversion of resting potential into action potential.

4 / 100

Category: Biology Ch 10 Class 11

The name animal is derived from the word.

Anima

Anemia

Aname

All of these

5 / 100

Category: Biology Ch 11 Class 11

3-Phosphoglycerate in the presence of ATP and reduced NADP (from the light-dependent stage) is reduced to:

NUMS 2020
Biology
Bioenergetics
Elimination Tool:

A) Ribulose bisphosphate

B) 6 carbon compound

C) 5 carbon compound

D) 3 carbon compound

6 / 100

Category: Biology

Identify the incorrect statement about Charles Darwin’s theory:

NUMS Mock 1
Biology
Evoloution

B) There is always a tendency of over reproduction in a species.

C) Vast gradual changes result in the origin of a new species.

D) Favorable variations survive and unfavorable will be exterminated.

E) Intra-specific competition occurs between different species and interspecific competition occurs among the individuals in a species.

7 / 100

Category: Biology Ch 14 Class 11

Fibrinogen is necessary for:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Metabolism

B) Respiration

C) Reproduction

D) Clotting

8 / 100

Category: Biology Ch 12 Class 12

Mountains of Koh Hindukush come under

Tundra

Grass land

Tropical forests

Temperate deciduous

9 / 100

Category: Biology Ch 12 Class 11

In human gut, chylomicrons are formed by the combination of:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

10 / 100

Category: Biology Ch 1 Class 12

Which of the following structure in plant’s body is called excretophores?

Stem

Leaves

Flowers

Roots

11 / 100

Category: Biology

Unpaired facial bones are:

NUMS Mock 3
Biology
Support and Movement

A) Maxilla, Zygomatic

B) Palatine, Inferior concha

C) Nasal, Lacrimal

D) Mandible, Vomer

12 / 100

Category: Biology Ch 12 Class 11

Strong chlorosis is due to the deficiency of _____ in plants.

Magnesium

Nitrogen

Potassium

Phosphorus

13 / 100

Category: Biology

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

A. Pq

B. Pc

C. Pt

D.Po

14 / 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

15 / 100

Category: Biology Ch 8 Class 11

Saccharomyces cerevisiae is the scientific name of a:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Fungus

B) Smut

C) Bacterium

D) Yeast

16 / 100

Category: Biology Ch 2 Class 11

The bond formed when two or more atoms complete their electron shells by sharing electrons is called:

Ionic bond

Hydrogen bond

Covalent bond

Electrovalent bond

17 / 100

Category: Biology

Q.8 Which of the following structure provides greater pathogenicity to the bacteria?

A. slime

B. cell wall

C. cell membrane

D. capsule

18 / 100

Category: Biology Ch 2 Class 11

Among the most abundant biomolecules, _____ is the most abundant one on earth.

NUMS 2016
Chemistry
Biological Molecules
Elimination Tool:

A) Proteins

B) Carbohydrates

C) Lipids

D) Vitamins

19 / 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

20 / 100

Category: Biology Ch 14 Class 11

Arteriosclerosis is:

NUMS 2016
Biology
Transport
Elimination Tool:

A) A metabolic disorder

B) A degenerative disorder

C) An infectious disorder

D) A nutritional deficiency disorder

21 / 100

Category: Biology

Most enzymes have an optimum temperature of around:

NUMS Mock 4
Biology
Enzymes

A) 30 C

B) 40 C

C) 50 C

D) 20 C

22 / 100

Category: Biology

Q.2 Competitive inhibition can be overcome by using

A. Low concentration of substrate

B. High concentration of inhibitor

C. Moderate concentration of inhibitor

D. High concentration of substrate

23 / 100

Category: Biology Ch 9 Class 12

During gel electrophoresis, the gel used is:

NUMS 2020
Biology
Biotechnology
Elimination Tool:

A) Agar gel

B) Agarose gel

C) Dextran

D) Toluene gel

24 / 100

Category: Biology

Q.7 Ribosomes are assembled in the nucleolus and then exported to cytoplasm via:

Exocytosis

Nuclear Pores

C. Nuclear envelope

D. Carrier mediated diffusion

25 / 100

Category: Biology

Q.26 The function/s of HCl during digestion is/are:

A. Adjust the pH

B. Softens the food

C. Activate pepsinogen to pepsin

D. All A, B, C

26 / 100

Category: Biology Ch 9 Class 12

The enzyme which seals the foreign DNA into the vector is

Restriction endonuclease

DNA polymerase

DNA ligase

DNA mutase

27 / 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

28 / 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

29 / 100

Category: Biology Ch 10 Class 11

Which one of the following is exclusively marine phylum?

NTS 2015 SMBBMC
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Echinodermata

C) Annelida

D) Arthropoda

30 / 100

Category: Biology Ch 10 Class 12

Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

NTS 2014
Biology
Evolution
Elimination Tool:

A) 1 and 2

B) 1 and 3

D) 2 and 3

E) 3 and 4

31 / 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

32 / 100

Category: Biology Ch 13 Class 12

Study of human population and things that affect them is

Ecology

Demography

Demology

Environment

33 / 100

Category: Biology Ch 9 Class 11

The zygote formed in liverworts is

Unicellular

Mulicellular

Multinucleate

None of these

34 / 100

Category: Biology Ch 1 Class 11

Which one is not correct for a productive theory?

It is predictive

It has explanatory power

It discourage s suggestion of different hypotheses

It discourages suggestion of different hypotheses

35 / 100

Category: Biology

Q.49 Gastric secretion is stimulated by:

A. Gastrin

B. Cholecystokinin

C. Secretin

D. Pancreozymin

36 / 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.

37 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

38 / 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

39 / 100

Category: Biology Ch 6 Class 11

If lipopolysaccharides did not appear in the wall of bacteria on staining then it will be known as ________.

UHS 2018
Biology
Kingdom Prokaryote
Elimination Tool:

A) Gram negative

B) Gram positive

C) Capsule

D) Both Gram positive & negative

40 / 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

41 / 100

Category: Biology Ch 14 Class 11

Highest blood pressure is found in:

NUMS 2015
Biology
Transport
Elimination Tool:

A) Arteries

B) Veins

D) None of the given options

C) Capillaries

42 / 100

Category: Biology Ch 13 Class 11

The glycolate produced diffuses into the membrane bounded organelles called

Glyoxisomes

Peroxisomes

Lysosomes

Mitochondria

43 / 100

Category: Biology Ch 1 Class 12

Sunken stomata are found in:

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Mesophytes

B) Xerophytes

C) Halophytes

D) Hydrophytes

44 / 100

Category: Biology Ch 2 Class 12

Which of the following statement about an arthropod exoskeleton is incorrect?

It permits gaseous exchange.

It contains joints, for the same purpose as present in human skeletal system.

It provides muscle attachment.

Like all the other types of exoskeleton, they lack sensation.

45 / 100

Category: Biology Ch 7 Class 11

Identify the correctly matched pair relating to a term and its meaning/function/example:

NTS 2017
Biology
Kingdom Protista
Elimination Tool:

A) nitrogen cycle… Rhizopus

B) denitrifying bacteria..change protein to ammonia

C) biosphere.. where life exists

D) lithosphere…water,air and soil.on the surface of earth

46 / 100

Category: Biology

Q.63 Ozone depletion is commonly caused by:

A. CFC’s

B. Industrial smoke

C. Nitrogen gases

D. Green house gases

47 / 100

Category: Biology Ch 5 Class 12

In sexual reproduction, plants have diplohaplontic life cycle with alternating

Diploid sporophyte and haploid gametophyte generations

Haploid sporophyte and diploid gametophyte generations

Diploid sporophyte and diploid gametophyte generations

Haploid sporophyte and haploid gametophyte generations

48 / 100

Category: Biology

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

NUMS Mock 1
Biology
Biotechnology

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

49 / 100

Category: Biology

Q.30 This group of animals has three bones in the ear.

A. Reptiles

B. Mammals

C. Both reptiles and mammals

D. Birds and mammals

50 / 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

51 / 100

Category: Biology

Which of the following single membranous organelle is absent in plant cells?

a. Vacuole

B. Golgi apparatus

C. Lysosomes

D. Endoplasmic reticulum

52 / 100

Category: Biology Ch 13 Class 12

In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

NTS 2019
Biology
Man and His Environment
Elimination Tool:

A) Intraspecific competition.

B) Interspecific competition

C) Environmental competition

D) All of the above

53 / 100

Category: Biology Ch 5 Class 11

Syphilis is caused by:

NUMS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Coccus

B) Bacillus

C) Spirillum

D) Spirochete

54 / 100

Category: Biology Ch 12 Class 11

Certain types of whales are also ______ feeder.

Fluid

Macrophagous

Filter

None of these

55 / 100

Category: Biology

The Porifera are pore – bearing animals, commonly called:

NUMS Mock 3
Biology
Kingdom Animalia

A) Corals

B) Sponges

C) Hydras

D) Anemones

56 / 100

Category: Biology Ch 12 Class 12

Desert ecosystem of Mianwali is

Thar

Thal

Cholistan

None

57 / 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.

58 / 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

59 / 100

Category: Biology Ch 10 Class 11

Sea horse is included in:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Pisces

B) Mammals

C) Insects

D) Mollusca

60 / 100

Category: Biology Ch 10 Class 11

The fate of each blastomere is foretold. The cleavage will be as

Spiral and indeterminate

Radial and indeterminate

Spiral and determinate

61 / 100

Category: Biology

The photosynthetic pigments of plants are arranged as clusters in thylakoid membranes. The reaction centers of these clusters consist of _____ molecules.

NUMS Mock 3
Biology
Bioenergetics

A) Chlorophyll

B) ATP

C) Carotenoids

D) Glucose

62 / 100

Category: Biology Ch 8 Class 12

In which of the following cases, genotypic and phenotypic ratio will remain same in F2 generation

Law of independent assortment

Law of Segregation

Test cross

Incomplete dominance.

63 / 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

64 / 100

Category: Biology Ch 10 Class 11

Which group of organisms has the following features?

I. three pairs of jointed legs

II. three-part segmented body

III. one pair of antennae

NTS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) arachnids

B) crustaceans

C) Insects

D) myriapods

65 / 100

Category: Biology Ch 8 Class 11

According to two kingdom classification fungi were placed in kingdom

Plantae

Animalia

Protista

Fungi

66 / 100

Category: Biology Ch 7 Class 12

Which of the following sub stages does not occur in prophase I?

NTS 2015 SMBBMC
Biology
Cell Cycle
Elimination Tool:

A) Leptotene

B) Zygotene

C) Synapsis

D) Diplotene

67 / 100

Category: Biology Ch 7 Class 12

Each kinetochore gets ________ fibers in mitosis

68 / 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

69 / 100

Category: Biology Ch 8 Class 12

A trait whose alleles are present in both males and females but prominent more in one sex than other is a:

NUMS 2016
Biology
Variation and Genetics
Elimination Tool:

A) Sex-linked trait

B) Sex limited trait

C) Sex influenced trait

D) X-linked trait

70 / 100

Category: Biology

Q.37 Which of the following neuron has a single long dendron?

A. Sensory neurons

B. Motor neurons

C. Inter neurons

D. Efferent neurons

71 / 100

Category: Biology Ch 3 Class 11

If the non-protien part is loosely attached to the protein part in the enzyme, it is known as ______.

PMC Practice 3
Biology
Enzymes
Elimination Tool:

A) Coenzyme

B) Prosthetic group

C) Cofactor

D) Apoenzyme

72 / 100

Category: Biology

The thick filaments, in a myofibril of muscles, are made of ________.

NUMS Mock 3
Biology
Support and Movement

A) Myoglobin

B) Myosin

C) Actin

D) Haemoglobin

73 / 100

Category: Biology Ch 13 Class 11

Active site of Rubisco is evolved to bind

CO2

Both of these

H2O

74 / 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

75 / 100

Category: Biology Ch 2 Class 11

Which statement is true about an aqueous medium:

Ionic as well as non ionic substance in aqueous media retains their identity.

Enzymes can not perform catalysis reaction in this medium.

Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions.

It is less favorable media for chemical reactions.

76 / 100

Category: Biology Ch 9 Class 12

Chimaeric DNA is also known as

Recombinant DNA

Complementary DNA

Vector

Plasmid

77 / 100

Category: Biology Ch 3 Class 11

If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because:

There is probably more substrate present than there is enzyme.

There is probably more enzayme available than there is substrate.

There is probably more product present than there is either substrate or enzyme.

The enzyme substrate complex is probably failing to form during the reaction.

78 / 100

Category: Biology Ch 6 Class 12

Which of the following is NOT the part of RNA?

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Nitrogenous bases

B) Ribose Sugars

C) Deoxyribose Sugars

D) Phosphate groups

79 / 100

Category: Biology Ch 3 Class 11

A/An _______ is mostly a non-protein chemical compound that is required for the protein’s biological activity.

NTS 2019
Biology
Enzymes
Elimination Tool:

A) Active site

B) Substrate

C) Cofactor

D) Enzyme

80 / 100

Category: Biology Ch 10 Class 11

Which of the following is a freshwater sponge?

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Sycon

B) Leucosolenia

C) Euplectella

D) Spongilla

81 / 100

Category: Biology

As an excretory organ, liver:

NUMS Mock 3
Biology
Homeostasis

A) Detoxifies many chemical poisons

B) Produces ammonia for excretion by the kidneys

C) Produces urea and uric acids from the nitrogen of amino acids

D) All of the above

82 / 100

Category: Biology Ch 8 Class 12

If the seed is heterozygous yellow (Yy). In a test cross, what will be the probability of appearance of seed colors?

NUMS 2019 Reconduct
Biology
Variation and Genetics
Elimination Tool:

A) 0 % yellow, 100 % green

B) 25 % yellow, 75 % green

C) 50 % yellow, 50 % green

D) 75 % yellow, 25 % green

83 / 100

Category: Biology

Q.31 The movement of minerals or water via extracellular pathway is known as:

A. Symplast

B. Apoplast

C. Vascular

D. None of these

84 / 100

Category: Biology

The numbers of capsomeres found in adenovirus capsid is?

NUMS Mock 3
Biology
Bio-diversity | Variety of Life

A) 162

B) 200

C) 252

D) 155

85 / 100

Category: Biology Ch 2 Class 11

Which one is an organic compound?

CO2

Water

Lipids

HCI

86 / 100

Category: Biology Ch 4 Class 12

Egg-laying mammals are called:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Prototheria

B) Protozoa

C) Chordata

D) Monotremes

E) Both A and D

87 / 100

Category: Biology

What part of the brain integrates sensory information such as pain and temperature?

NUMS Mock 2
Biology
Coordination and Control

A) Forebrain

B) Midbrain

C) Hindbrain

D) Spinal cord

88 / 100

Category: Biology Ch 10 Class 12

What is in q2 Hardy Weinberg equilibrium?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Frequency of the dominant allele

B) Frequency of the recessive allele

C) Frequency of both alleles

D) Number of both alleles

89 / 100

Category: Biology Ch 4 Class 11

Who coined the term CELL?

Schwann

Schleiden

Robert Hook

Both a and b

90 / 100

Category: Biology Ch 4 Class 12

Which of the following is an ovoviviparous animal?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) basking shark

B) humans

C) blue shark

D) all of these

91 / 100

Category: Biology

Q.43 Which of the following disappear during muscle contraction?

A. A-band

B. H-zone

C. I-band

D. M-line

92 / 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

93 / 100

Category: Biology Ch 9 Class 12

Which one has antibiotic resistance gene for tetracycline and ampicillin?

pSC 101

pBR 322

pCR 322

None of these

94 / 100

Category: Biology Ch 4 Class 12

Which statement is incorrect?

Climacteric is burst of respiratory activity in fruit ripening

It is associated with ethane production C

It helps in fruit set

It helps in fruit ripening

95 / 100

Category: Biology Ch 11 Class 11

Aerobic respiration results in how much ATP?

NUMS 2016
Biology
Bioenergetics
Elimination Tool:

A) 2

B) 36

C) 18

D) 32

96 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

97 / 100

Category: Biology Ch 2 Class 12

Exoskeleton of a marine snail is composed of

CaPO4

CaCO3

CaSO4

SiO2

98 / 100

Category: Biology Ch 6 Class 11

For respiratory metabolism, a bacterial cell membrane contains:

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Proteins

B) Lipids

D) Chemicals

C) Enzymes

99 / 100

Category: Biology Ch 7 Class 11

Symptoms of malaria occur specifically due to the formation of:

NUMS 2015
Biology
Kingdom Protista
Elimination Tool:

A) Sporozoite

B) Merozoite

C) Gametocyte

D) Oocyte

100 / 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

Your score is

The average score is 57%

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