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 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.

2 / 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

3 / 100

Category: Biology Ch 7 Class 12

Microtubule subunits (for spindle fibers) are synthesized in _______ phase.

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) G1

B) M

C) G2

D) S

4 / 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

5 / 100

Category: Biology Ch 1 Class 12

Which part of the brain regulates body temperature?

NTS 2016 SMBBMC
Biology
Homeostasis
Elimination Tool:

A) Cerebellum

B) Cerebrum

C) Hypothalamus

D) Medulla

6 / 100

Category: Biology Ch 5 Class 11

Which of the following are composed of proteins only which contain the information that codes for their own replication?

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

A) Virus

B) Virion

C) Prions

D) Capsule

7 / 100

Category: Biology Ch 4 Class 11

Factory of ribosomal systhesis is

Cytoplasm

Nucleus

Nucleolus

Endoplasmic reticulum

8 / 100

Category: Biology Ch 6 Class 12

DNA contains

Purines (A and G) pyrimidines (U and (c)

Purines (T and (c) pyrimidines (A and G)

Purines (A and (c) pyrimidines (U and G)

Purines (A and G) pyrimidines (T and (c)

9 / 100

Category: Biology Ch 12 Class 12

Which statement is incorrect?

Average rainfall in temperate deciduous forests is 750-1500mm

empera ture of coniferous alpine and boreal forests is upto 10 degrees

Northern coniferous forests are called Taiga

Coniferous forests located at high latitude are alpine

10 / 100

Category: Biology Ch 6 Class 12

A tortion of chromatin that is condensed only during cell division is

Euchromatin

Heterochromatin

Biochromatin

Nucleochromatin

11 / 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

12 / 100

Category: Biology Ch 3 Class 12

Which one of the following is a neurotransmitter?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Dopamine

B) Hydrochloric acid

C) Sodium ions

D) Calcium ions

13 / 100

Category: Biology Ch 6 Class 12

Part of the amino acid sequences In normal and sickle cell hemoglobin are shown.

Normal haemoglobin

Thr – pro – glu – glu

Sickle cell haemoglobin

thr – pro – val – glu

mRNA codons for these amino acids are

Glutamine (glu) GAA GAG

Threonine (thr) ACU ACC

Proline (pro) CCU CCC

Valine (val) GUA GUG

Which transfer RNA molecule is Involved in the formation of this part of the sickle cell haemoglobin?

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

A) GUG

B) CAU

C) UGC

D) GAG

14 / 100

Category: Biology Ch 11 Class 11

The light dependent reaction of photosynthesis occurs in:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Stroma of chloroplast

B) Guard cells of stomata

C) Thylakoid membrane of chloroplast

D) Cytoplasm of leaf cell

15 / 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

16 / 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

17 / 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

18 / 100

Category: Biology Ch 4 Class 11

60S and 40S subunit combine to form ______ particle

100 S

90 S

80 S

70 S

19 / 100

Category: Biology Ch 13 Class 12

Which statement is true?

20% of total water is in the form of frozen ice caps

80% is in oceans

1% as fresh water lakes, streams and rivers

10% is in canals

20 / 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

21 / 100

Category: Biology Ch 5 Class 12

Function of intercalary meristems is

. Increase in length

Increase in diameter

Production of leaves and flowers

None of these

22 / 100

Category: Biology Ch 4 Class 11

Lysosomes function in:

NTS 2011
Biology
Cell Structure and Function
Elimination Tool:

A) Protein synthesis

B) Processing

C) Intracellular digestion

D) Lipid synthesis

23 / 100

Category: Biology

Q42 The process that secretes insulin from the cell is called?

A. Endocytosis

B. Pinocytosis

C. Phagocytosis

D. Exocytosis

24 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

25 / 100

Category: Biology Ch 4 Class 12

Which characteristic is not of identical twins

. Produced by separation of two blastomeres

Have different genetic makeup

Produced asexually

Produced when embryo is at two cell stage

26 / 100

Category: Biology Ch 5 Class 12

Germ cells give rise to:

NTS 2012
Biology
Growth and Development
Elimination Tool:

A) Legs

B) Head

C) Eggs and sperms

D) Hands

27 / 100

Category: Biology Ch 7 Class 12

From each pair of centrioles ________ sets of microtubules originate

28 / 100

Category: Biology

Major coordinating centre for sensory and motor signaling is:

NUMS Mock 3
Biology
Coordination and Control

A) Thalamus

B) Cerebrum

C) Hypothalamus

D) Cerebellum

29 / 100

Category: Biology

Q.19 Sm0oth endoplasmic reticulum is abundant in which types of cells?

A. lipid metabolism

B. protein metabolism

C. glucose metabolism

D. calcium metabolism

30 / 100

Category: Biology Ch 14 Class 11

In roots, the apoplast pathway of water is disrupted when water reaches:

PMC 2020
Biology
Transport
Elimination Tool:

A) Plasmodesmata

B) Endodermis

C) Cortex

D) Pith

31 / 100

Category: Biology Ch 6 Class 12

The length of okazaki fragments in eukayotes is

150–250 nucleotides long

200-300 nucleotides

1000-2000 nucleotde

100-200 nucleotides

32 / 100

Category: Biology Ch 3 Class 11

An activated enzyme consisting of polypeptide chain and a cofactor is called:

Apoenzyme

Holoenzyme

Activated enzyme

Both b and c

33 / 100

Category: Biology Ch 9 Class 11

Sporophyte is

Monoploid

Haploid

Diploid

Polyploidy

34 / 100

Category: Biology Ch 9 Class 11

Horsetails are included in class

Sphenopeida

Lycopsida

Psilopsida

Pteropsida

35 / 100

Category: Biology Ch 2 Class 12

Which of the following bones are present in the palm of the hand:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Carpals

B) Metacarpals

C) Phalanges

D) Tarsal

36 / 100

Category: Biology Ch 7 Class 12

Process of uncontrolled cell division is due to which one of the following reasons?

NUMS 2018
Biology
Cell Cycle
Elimination Tool:

A) DNA replication

B) Mutations

C) Translation

D) Transcription

37 / 100

Category: Biology

Q44 Study of fossils is called

A. Mammalogy

B. Paleontology

C. Herpetology

D. Ornithology

38 / 100

Category: Biology Ch 10 Class 11

Amphibians live on:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Water

B) Water and land

C) Land

D) Air

39 / 100

Category: Biology Ch 11 Class 11

Which of the following is a compensation point:

Leaves respire and utilize O2 and release CO2.

Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.

Rate of respiration becomes more than rate of photosynthesis.

40 / 100

Category: Biology Ch 7 Class 11

All of the following organisms belong to the kingdom protista EXCEPT:

NTS 2012
Biology
Kingdom Protista
Elimination Tool:

A) Ulva

B) Euglena

C) Slime Mold

D) Common Mold

41 / 100

Category: Biology Ch 7 Class 11

The feeding stage of slime mold is a

UHS 2010
Biology
Kingdom Protista
Elimination Tool:

A) Gastrozoid

B) Sporozoite

C) Plasmodium

D) Merozote

42 / 100

Category: Biology Ch 7 Class 12

Feature of cancer cells in common?

High nucleus to cytoplasmic ratio

Prominent nucleoli

Many mitosis

All of these

43 / 100

Category: Biology Ch 8 Class 11

Constricting ring around nematode is formed by

Arthrobotrys

Pleurotus ostreatus

Mildews

All of these

44 / 100

Category: Biology

Q.22 Pick the one which releases anticoagulant in human intestine to prevent clotting:

A. Ascaris lumbricoides

B. Ancylostoma duodenale

C. Enterobius vermicularis

D. Hirudo medicinalis

45 / 100

Category: Biology

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

A.C

B.H

C.N

D. O

46 / 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

47 / 100

Category: Biology Ch 11 Class 11

First stable compound during Calvin cycle is:

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) 3-phosphoglycerate

B) Glyceraldehyde 3 – phosphate

C) 1, 3 bisphosphoglycerate

D) Ribulose bisphosphate

48 / 100

Category: Biology

Q.55 Complete breakdown of glucose molecule takes place in which of the following?

A. Alcoholic fermentation

B. Lactic acid fermentation

C. Aerobic respiration

D. None of these

49 / 100

Category: Biology Ch 8 Class 11

Which of the following component is found in the cell wall of fungi?

UHS 2012
Biology
Kingdom Fungi
Elimination Tool:

A) Cellulose

B) Chitin

C) Proteins

D) Glycerol

50 / 100

Category: Biology Ch 4 Class 12

Menstruation, the shedding of the lining of the uterus (endometrium), is accompanied by:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Shivering

B) Fever

C) Bleeding

D) Vomiting

51 / 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

52 / 100

Category: Biology

Which of the following animals can survive without drinking water?

NUMS Mock 4
Biology
Nutrition

A) Kangaroo rat

B) Pig

C) Kangaroo

D) Camel

53 / 100

Category: Biology Ch 9 Class 12

First restriction enzyme was isolated by

Kary Mullis B

Hamilton O. Smith

Maxam Gilbert

Hamilton John

54 / 100

Category: Biology Ch 9 Class 11

Antheridiophore and archegoniophore are found in

Marchantia

Funaria

Both of these

None of these

55 / 100

Category: Biology

Why do some vegetables lose water when salt is applied to them?

NUMS Mock 3
Biology
Transport

A) Due to the less negative water potential of the external environment than the cell.

B) Due to the more negative water potential of the external environment that the cell

C) . Due to the less positive water potential of the external environment than the cell

D) Due to more positive water potential of the external environment than the cell

56 / 100

Category: Biology Ch 5 Class 12

Cells elongate by

Mitosis

Uptake of water

Stretching

Formation of cell wall

57 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not found in series proterostomia.

Annelida

Arthropoda

Mollusea

Echinodermata

58 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

G1 phase

S phase

G2 phase

G0 phase

59 / 100

Category: Biology Ch 9 Class 11

The male reproductive parts of the flower are called

UHS 2012
Biology
Kingdom Plantae
Elimination Tool:

A) Gynoecium

B) Calyx

C) Androecium

D) Corolla

60 / 100

Category: Biology Ch 13 Class 12

Process that supplies food to living things through decaying and decomposition is called

. Food cycle

Nutrient cycle

Dead-live cycle

None of these

61 / 100

Category: Biology

Q.13 Cellulose is the major component of?

A. Primary wall

B. Secondary wall

C. Middle lamella

D. All of these

62 / 100

Category: Biology

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

tRNA

mRNA

rRNA

Micro RNA

63 / 100

Category: Biology Ch 3 Class 12

The phytohormones controlling the plant movements are?

NTS 2015 SMBBMC
Biology
Coordination and Control
Elimination Tool:

A) Auxins

B) Gibberellins

C) Abscisic acid

D) Cytokinins

E) All of the above

64 / 100

Category: Biology Ch 5 Class 12

Higher plants grow through

Growing points

Whole plant body is capable of growing

Only roots grow

None of these

65 / 100

Category: Biology Ch 8 Class 11

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

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Starfish

B) Mushrooms

C) Algae

D) Human

66 / 100

Category: Biology

Two species can avoid competition and better use the environment’s resources by occupying different ____.

NUMS Mock 4
Biology
Evolution

A) Adaptations

B) Polymorphism

C) Niches

D) Specialization

67 / 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

68 / 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

69 / 100

Category: Biology

Q.48 Octopus belongs to phylum mollusca because:

A. It has suckers and tentacles.

B. It has a soft body covered by a shell.

C. It has a soft, unsegmented body with a thin, flexible internal shell

D. It has a soft, segmented body with a head and a foot.

70 / 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

71 / 100

Category: Biology Ch 7 Class 11

Of the following which one has glassy shells?

Radiolarians

Forams

Both of these

None of these

72 / 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

73 / 100

Category: Biology Ch 6 Class 11

The DNA of the bacterium is present in a distinct region called:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Nucleolus

B) Centrosome

C) Nucleoid

D) Nucleus

74 / 100

Category: Biology

Q.56 During cyclic photophosphorylation, electrons are diverted back to:

A. Plastoquinone

B. Cytochrome complex

C. Plastocyanin

D. Ferredoxin

75 / 100

Category: Biology

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3Mgl

76 / 100

Category: Biology Ch 8 Class 12

If we cross round (RR) seeded plants with wrinkled (rr) seed plant, and get F1 round seeded. In F2 generation, what will be genotypic ration of plants try Punnett square method?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

B) 1:1

C) 2:1

D) 1:1:2

E) 1:2:1

77 / 100

Category: Biology Ch 3 Class 12

The estrogen hormone secretion during the oogenesis is stimulated by:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) LH hormone

B) Inhibition hormone

C) FSH hormone

D) Testosterone hormone

78 / 100

Category: Biology Ch 10 Class 11

Which one of following is a true fish?

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Cuttle fish

B) Silver fish

C) Jelly fish

D) Sea fish

79 / 100

Category: Biology Ch 6 Class 11

Bacterial pilli help in:

NTS 2011
Biology
Kingdom Prokaryote
Elimination Tool:

A) Locomotion

B) Conjugation

C) Phagocytosis

D) Pinocytosis

80 / 100

Category: Biology

Q37 The muscle contraction depends on:

A. Nerve impulse

B. Energy

C. Calcium

D. All of these

81 / 100

Category: Biology

Nitrogen-fixing bacteria in root nodules fix nitrogen in soil air into:

NUMS Mock 1
Biology
Nutrition

A) Ammonia

B) Nitrite

C) Nitrate

D) Amino acid

82 / 100

Category: Biology Ch 2 Class 12

Unpaired facial bones are:

NUMS 2018
Biology
Support and Movement
Elimination Tool:

A) Maxilla, Zygomatic

B) Palatine, Inferior concha

C) Nasal, Lacrimal

D) Mandible, Vomer

83 / 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

84 / 100

Category: Biology Ch 4 Class 12

What is critical in photoperiodism?

Length of light period

Length of dark period

Both a and b

None of these

85 / 100

Category: Biology Ch 1 Class 12

Which of the following reduces the rate of transpiration by adaptations in xerophytes?

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Large surface area of leaves

B) Increase number of stomata

C) Thick waxy cuticle

D) Excessive loss of water

86 / 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

87 / 100

Category: Biology Ch 2 Class 11

Which of the following has the ability to develop ester linkage with the OH group of Pentose sugar?

NUMS 2017
Biology
Biological Molecules
Elimination Tool:

A) Purine

B) Pyrimidine

C) H3PO4

D) HNO3

88 / 100

Category: Biology Ch 10 Class 12

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called

Community

Family

Population

Race

89 / 100

Category: Biology Ch 9 Class 11

Which of the following statement about alternation of generation in bryophytes is incorrect?

It involves alternation of morphologically different generations

Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.

Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization

pore formation occurs through meiosis

90 / 100

Category: Biology Ch 2 Class 11

Ptyalin can convert starch into:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Monosaccharide form

B) Oligosaccharide form

C) Polysaccharide form

D) All given options

91 / 100

Category: Biology Ch 9 Class 11

Which of the following of bryophytes are the simplest one?

Porella

Funaria

Anthocerus

Polytrichum

92 / 100

Category: Biology

Q.36 Parkinson’s disease is caused by cell death, which produces ____________.

A. Acetylcholine

B. Serotonin

C. Dopamine

D. Adrenaline

93 / 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

94 / 100

Category: Biology Ch 1 Class 11

Which one is a micromolecule?

Polysaccharide

Protein

Hemoglobin

ATP

95 / 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

96 / 100

Category: Biology Ch 10 Class 11

An organism appears to be a segmented worm. Upon observation, it is determined that the organism has a closed circulation, a mouth, and an anus and does not have an exoskeleton. The organism most likely belongs to the phylum:

NTS 2010
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Annelida

C) Echinodermata

D) Arthropoda

97 / 100

Category: Biology Ch 9 Class 11

Excess water in plants is forced out in the form of droplets through?

PMC 2021 Tested
Biology
Kingdom Plantae
Elimination Tool:

A) Lenticles

B) Stomata

C) Hydathodes

D) Cuticle

98 / 100

Category: Biology Ch 11 Class 11

NADH produces how many ATP?

NUMS 2016
Biology
Bioenergetics
Elimination Tool:

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 6 ATP

99 / 100

Category: Biology Ch 11 Class 12

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

Species

Family

Community

Biomes

100 / 100

Category: Biology Ch 10 Class 12

Which scientist does not match his achievements

Lamarck published his theory of evolution

Lyell published principles of geology

Malthus published essay on principle of population

Cuvier published papers on inheritance

Your score is

The average score is 61%

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