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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1 / 100

Category: Biology Ch 9 Class 11

In bryophytes fertilization takes place in

Antheridia

Archegonia

water

Ovule

2 / 100

Category: Biology Ch 7 Class 11

Which of the following statement about eiliates in incorrect?

Contain mainly unicellular organisms.

Their contractile vacoule is respobsible for water regulation.

They are even capable of sexual reproduction.

Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in sexual process.

3 / 100

Category: Biology Ch 7 Class 11

Trypanosoma belongs to class:

NTS 2011
Biology
Kingdom Protista
Elimination Tool:

A) Sarcodina

B) Flagellata

C) Ciliata

D) Suctoria

4 / 100

Category: Biology Ch 13 Class 12

Which one is a non-renewable resource?

Wild life

Forests

Natural gas

Land

5 / 100

Category: Biology

The thickest chamber of the human heart is:

NUMS Mock 4
Biology
Transport

A) Left atrium

B) Right atrium

C) Right ventricle

D) Left ventricle

6 / 100

Category: Biology Ch 2 Class 11

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the haemoglobin molecule?

NTS 2018
Biology
Biological Molecules
Elimination Tool:

A) Primary structure

C) Tertiary structure

B) Secondary structure

D) Quatenary Structure

7 / 100

Category: Biology Ch 13 Class 12

Water constitutes –% of body weight?

A. 25-30%

70-90%

10-30%

30-50%

8 / 100

Category: Biology Ch 13 Class 12

Process ensuring the survival of species over long periods of time, even though individual members of the species die.

UHS 2018
Biology
Man and His Environment
Elimination Tool:

A) Reproduction

B) Adaptability

C) Mitosis

D) Respiration

9 / 100

Category: Biology

The uterus of the female reproductive system opens into the _____.

NUMS Mock 4
Biology
Reproduction

A) Placenta

B) Birth canal

C) Cervix

D) All of these options are correct

10 / 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

11 / 100

Category: Biology

Booklungs serve the function of respiration in:

NUMS Mock 3
Biology
Gaseous Exchange

A) Scorpion

B) Earthworm

C) Frog

D) Cockroaches

12 / 100

Category: Biology

Q.52 A chromosome in which a centromere stays at one end is called?

A. Metacentric

Telocentric

C. Acrocentric

D. All of these

13 / 100

Category: Biology Ch 2 Class 12

Epinasty is controlled by

Gibberellins

Abscisins

Auxins

Cytokinins

14 / 100

Category: Biology

Q.64 According to the induced fit model. What happens when an enzyme-substrate omplex is formed?

A. The contact between the substrate and the enzyme causes a change in the shape of the active site

B. The shape of the substrate and the shape of the active site are complementary to each other.

C. The substrate fits into active site and forms bonds with the amino acids at the active site.

D. All of the above.

15 / 100

Category: Biology Ch 1 Class 12

In osmosis water molecules move from area of _______ to _______ through semipermeable memberane

Higher solute concentration to lower solute concentration

Lower solute concentration to higher solute concentration

Lower solvent concentration to higher solvent concentration

All of these

16 / 100

Category: Biology Ch 11 Class 11

Chlorophyll is insoluble in:

Carbon tetrachloride

Alcohol

Organic solvents

Water

17 / 100

Category: Biology Ch 1 Class 12

The technique used for the non-surgical removal of kidney stones is called:

NUMS 2016
Biology
Homeostasis
Elimination Tool:

A) Ultrasound

B) Lithotripsy

C) Dialysis

D) X-rays

18 / 100

Category: Biology Ch 5 Class 11

Eukaryotic, multicellular and consumers belong to ______ kingdom.

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

A) Monera

B) Protista

C) Fungi

D) Animalia

19 / 100

Category: Biology Ch 3 Class 11

Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a(n):

NTS 2013
Biology
Enzymes
Elimination Tool:

A) Holoenzyme

B) Apoenzyme

C) Coenzyme

D) Zymoenzyme

20 / 100

Category: Biology

The system involved in preparing our body in condition of stress and emergency:

NUMS Mock 2
Biology
Coordination and Control

A) Nervous system only

B) Endocrine system only

C) Both nervous & endocrine system

D) Both endocrine & exocrine

21 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of Kingdom Animalia.

All animals are ingestive heterotrophs

All animals are eukaryotes

All animals develop from the dissimilar gametes i.e. large sperm and small egg.

It is largest kingdom

22 / 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

23 / 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

24 / 100

Category: Biology Ch 11 Class 12

Secondary succession starts from A.

A bar rock sand

Clear glacial pool

From remains of previous ecosystem

Fire

25 / 100

Category: Biology

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

NUMS Mock 3
Biology
Variation and Genetics

A) 1.

B) 2.

C) 3.

D) 4.

26 / 100

Category: Biology Ch 2 Class 11

The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:

High specific heat of vaporization

High specific heat capacity

Its Dipole nature

Its liquid state

27 / 100

Category: Biology Ch 9 Class 12

Bacterial cells take up recombinant plasmids when they are treated with:

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) CaCl2

B) NaCl

C) KCl

D) NaOH

28 / 100

Category: Biology Ch 1 Class 12

Which of the following statement about Homeostasis is incorrect

There is a definite control system that regulates the homeostatic activities

Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment

Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment

All are correct

29 / 100

Category: Biology Ch 8 Class 12

In question number 2 what will be frequency of dwarf plant in F2

0.25

0.5

0.75

30 / 100

Category: Biology Ch 11 Class 11

Which of the following statement about the head of a chlorophyll molecule is incorrect:

It is a porphyrin ring or tetrapyrrole ring structure

It is flat, square and light absorbing

Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

It is hydrophobic

31 / 100

Category: Biology Ch 13 Class 11

Oxygen contents per liter of air is

10 ml

100 ml

200 ml

100ml

32 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

33 / 100

Category: Biology Ch 13 Class 11

The passageways of the respiratory system mucous secreting cells called:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tracheal cells

B) Goblet cells

C) Surfactant cells

D) Pleural cells

34 / 100

Category: Biology

HIV is a:

NUMS Mock 3
Biology
Bio-diversity | Variety of Life

A) Virus

B) Prions

C) Viroid

D) Venom

35 / 100

Category: Biology Ch 6 Class 11

The first simplest oxygen producing organism:

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Methanogens

B) Cyanobacteria

C) Euglena

D) Spirogyra

36 / 100

Category: Biology Ch 11 Class 12

All populations within an ecosystem interconnected to one another are known as

Species

Family

Community

Biomes

37 / 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

38 / 100

Category: Biology Ch 8 Class 11

Which one of the following is different from all the rest regarding the number of cells inits body?

Rusts

Mushrooms

Molds

Yeasts

39 / 100

Category: Biology Ch 13 Class 12

Hydroelectricity is generated by using ______ of falling water.

Potential energy

Gravitational energy

Kinetic energy

. All of these

40 / 100

Category: Biology Ch 4 Class 11

Detoxification of drugs is the function of _____ in a cell.

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) R.E.R

B) S.E.R

C) Liver cells

D) Lysosome

41 / 100

Category: Biology Ch 4 Class 11

The second most abundant bio element in the human body is:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Oxygen

B) Carbon

C) Hydrogen

D) Nitrogen

42 / 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

43 / 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

44 / 100

Category: Biology Ch 9 Class 11

The scientific name of potato is Solanum tuberosum and that of brinjal is Solanum melongena. This indicates that both potato and brinjal are members of the

NTS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Same species but different genera

B) Same genus but different classes

C) Same species but different classes

D) Same genus but different species

45 / 100

Category: Biology Ch 10 Class 12

Who developed a theory of natural selection essentially identical to Darwin’s?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Malthus

C) Lamark

D) Alfred Wallace

46 / 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

47 / 100

Category: Biology Ch 4 Class 12

In which organism males are haploid

Aphids

Honey bee

Mosquito

Butterfly

48 / 100

Category: Biology Ch 2 Class 12

Roots of a plant show

Positive phototropism and negative geotropism.

Negative phototropism and positive geotropism.

Negative tactic movement and positive tropic movement.

Positive geotropism of stem and roots

49 / 100

Category: Biology Ch 13 Class 11

The blood enters the _____ side of heart

Posterior

Lateral

All possibl

50 / 100

Category: Biology Ch 2 Class 11

According to the fluid mosaic model of cell membrane, which zone is embedded inside?

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Hydrophobic

B) Hydrophilic

C) Globular

D) Filamentous

51 / 100

Category: Biology Ch 1 Class 12

Which excretory product in produced in plants during autotrophic mode of life?

CO2

H2O

Both A and B

52 / 100

Category: Biology Ch 6 Class 11

The cell membrane of a bacterial cell often invaginates to produce membranous structures referred to as:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Centrosomes

B) Mesosomes

C) Dictyosomes

D) Polysomes

53 / 100

Category: Biology Ch 9 Class 11

“Vascular System absent; gametophyte dominant, sporophyte attached to gametophyte; homosporous” are distinguishing characters of

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

A) Psilopsida

B) Pteropsida

C) Angiosperms

D) Bryophyta

54 / 100

Category: Biology Ch 1 Class 12

The characteristic which enable animals to tolerate dehydration is called

Osmoconformation

Osmoregulaton

Anhydrobiosis

Anhydrosis

55 / 100

Category: Biology Ch 10 Class 12

Flagella might have arisen through the ingestion of

Cyano-bacteria

Spirochetes

Chlamydomonas

Paramecium

56 / 100

Category: Biology

The dark reactions of photosynthesis are characterized by:

NUMS Mock 1
Biology
Bioenergetics

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

57 / 100

Category: Biology Ch 9 Class 12

This enzyme is used to cut DNA molecule in rDNA technology

PMC Sample 2
Biology
Biotechnology
Elimination Tool:

A) ligase

B) phosphatase

C) ribonuclease

D) restriction enzyme

58 / 100

Category: Biology

Q.62 Sum rays are re-radiated from the surface of earth in the form of:

A. Long wave radiation

B. Radio waves

C. Short wave radiation

D. Medium waves

59 / 100

Category: Biology

The movement of plants in response to touch stimulus is called:

NUMS Mock 4
Biology
Support and Movement

A) Hydrotropism

B) Chemotropism

C) Geotropism

D) Thigmotropism

60 / 100

Category: Biology Ch 3 Class 12

Chemically auxins are

Indole propionic acid.

Indole carboxylic acid.

Indole acetaldehyde

Indole acetic acid

61 / 100

Category: Biology Ch 10 Class 12

What was the source of hydrogen for first photosynthetic organisms?

Water

Hydrogen present in soil

Hydrogen sulphate

Hydrogen sulphide

62 / 100

Category: Biology Ch 3 Class 12

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Trypsin

B) Pepsin

C) Chymotrypsin

D) Amylase

63 / 100

Category: Biology Ch 12 Class 12

Eutrophication is

Process of decreasing nutrients by human activities

Adequate nutrition accelerated by human activities

Changing the trophic levels of an ecosystem by human activities

Addition of more predators in an ecosystem

64 / 100

Category: Biology Ch 14 Class 11

The favourite host cells of the HIV-Virus are:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Lymphocytes

B) RBCs

C) T-cells

D) B-cells

65 / 100

Category: Biology Ch 14 Class 11

How many ml of blood is pumped by each contraction of the heart?

NUMS 2016
Biology
Transport
Elimination Tool:

A) 80 ml

B) 90 ml

C) 70 ml

D) 60 ml

66 / 100

Category: Biology Ch 6 Class 12

Which of the following statements correctly describes homologous chromosomes?

NTS 2016 DUHS & JSMU
Biology
Chromosomes and DNA
Elimination Tool:

A) They are formed during meiosis.

B) They are held together by centromeres.

C) They are chromatids of the same chromosome.

D) They carry both morphologically similar members with same set of genes.

67 / 100

Category: Biology Ch 5 Class 12

Meristems are group of cells that

Allow the surrounding region to divide

Provide nutrition

. Help in movement

Retain the potential to divide

68 / 100

Category: Biology Ch 12 Class 11

Intrinsic factor is secreted by:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Pancreas

B) Liver

C) Stomach

D) Duodenum

69 / 100

Category: Biology Ch 12 Class 12

End of earth’ is related to

Tropical rain forest

Temperate deciduous forest

Savanna

Tundra

70 / 100

Category: Biology

Q.49 Another name for the sex cell is:

A. Hormone

B. Gamete

C. Zygote

D. Testicle

71 / 100

Category: Biology Ch 3 Class 12

Thyroid gland requires high amount of:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Phosphate

B) Calcium

C) Iodine

D) Sodium

72 / 100

Category: Biology

Which of the following is not related to apoptosis?

NUMS Mock 1
Biology
Growth and Development

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

73 / 100

Category: Biology Ch 4 Class 11

Which of the following offers an active barrier between the cell content and their environment by allowing only selective substances to pass through it?

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) Cell wall

B) Plasma membrane

C) Nuclear membrane

D) Vacuole

74 / 100

Category: Biology Ch 4 Class 12

What is the commercial method of producing millions of seedlings in limited time?

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Parthenogenesis

B) Parthenocarpy

C) Cutting

D) Grafting

75 / 100

Category: Biology Ch 9 Class 11

The part of sporophyte which is called sporangium is

Capsule

Foot

Stalk

None of these

76 / 100

Category: Biology Ch 9 Class 12

Which statement is not true about PCR?

Developed by Kary Mullis

Take its name from DNA polymerase

Is not very specific

Taq polymerase is used

77 / 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

78 / 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

79 / 100

Category: Biology Ch 4 Class 11

Cellulose is the major component of

Primary wall

Secondary wall

Middle lamella

all of the above

80 / 100

Category: Biology Ch 12 Class 11

The leaf is bilobed with midrib between them. The plant is

Saraccnia

Dionaea

Pitcher plant

None of these

81 / 100

Category: Biology

Q.9 This is a reduced compound

A. CO2

B. O2

C. NADH

D. NAD

82 / 100

Category: Biology Ch 6 Class 12

The sequence of nucleotides that determines the amino acid sequence of a protein is

Chromosome

DNA

RNA

Gene

83 / 100

Category: Biology

Q3 Assymetrical body is a feature of phylum

A. Annelida

B. Arthropoda

C. Porifera

D. Cnidaria

84 / 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

85 / 100

Category: Biology Ch 13 Class 12

Geothermal energy is

. Energy obtained from nuclear fuel

Energy obtained from burning natural fuels

Heat energy trapped underground

Energy obtained from blowing hot winds

86 / 100

Category: Biology Ch 6 Class 11

Germ theory was presented by:

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Robert Koch

B) Antonie van Leeuwenhoek

C) Robert Hooke

D) Robert Brown

87 / 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

88 / 100

Category: Biology Ch 12 Class 11

Of the following, which one is missing in herbivores?

Premolars

Canines

Incisors

Molars

89 / 100

Category: Biology Ch 10 Class 12

Analogous organs show:

NUMS 2020
Biology
Evolution
Elimination Tool:

A) Straight evolution

B) Convergent evolution

C) Zig-zag evolution

D) Divergent evolution

90 / 100

Category: Biology Ch 7 Class 11

Cyanobacteria resemble photosynthetic eukaryotes because they have:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) PS-I

B) None of these

C) PS-I and PS-II both

D) PS-II

91 / 100

Category: Biology Ch 6 Class 12

Chromosome is made of

2 chromatids +1 centromere +secondary constriction

1 chromated + 1 centromere + primary constriction

2 chromatids + 1 centromere + primary constriction

2 chromatids + 2 centromere + secondary constriction

92 / 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

93 / 100

Category: Biology

Enzymes work by lowering the ______ of the reactions they catalyse:

NUMS Mock 4
Biology
Enzymes

A) Kinetic energy

B) Activation energy

C) Heat energy

D) Potential energy

94 / 100

Category: Biology Ch 6 Class 12

A typical human chromosome contains _________ nucleotides in its DNA

240 million

140 million

150 million

160 million

95 / 100

Category: Biology Ch 9 Class 12

In recombinant DNA technology, the copies of recombinant DNA are increased by:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction enzyme

B) Ligase

C) Selection of host with rDNA

D) Multiplication of host with rDNA

96 / 100

Category: Biology

Q.20 Of the following, which one is not the characteristic of kingdom animalia:

A. All animals are ingestive heterotrophs

B. All animals are diploid

C. All animals are eukaryotes

D. All animals are developed from dissimilar haploid gametes e.g. larger sperm and small egg

97 / 100

Category: Biology Ch 7 Class 12

How does the second meiotic division differ from mitosis? In the second meiotic division:

NTS 2015 SMBBMC
Biology
Cell Cycle
Elimination Tool:

A) Chiasmata Formed between the chromatids of a bivalent

B) Each chromosome replicates to form two chromatids during metaphase

C) The separating chromatids of a pair differ genetically

D) None of the above

98 / 100

Category: Biology Ch 3 Class 11

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?

NTS 2015 DUHS and JSMU
Biology
Enzymes
Elimination Tool:

A) 1 and 4

B) 2 and 4

C) 1 and 2

D) 1,2,3 and 4

99 / 100

Category: Biology

DNA made by joining pieces from two or more different sources:

NUMS Mock 3
Biology
Biotechnology

A) Probes

B) Restriction endonuclease

C) Mutated DNA

D) Recombinant DNA

100 / 100

Category: Biology Ch 3 Class 11

A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called

Active site

Binding site

Catalytic site

Allosteric site

Your score is

The average score is 61%

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