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 6 Class 11

Bacteria having a tuft of flagella at one end are called:

NTS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Peritrichous

B) Monotrichous

C) Lophotrichous

D) Amphitrichous

2 / 100

Category: Biology Ch 1 Class 12

Sphincter muscle in urinary system present near the junction of:

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Pelvis and ureter

B) Ureter and urinary bladder

C) Urinary bladder and urethra

D) Urethra and bladder

3 / 100

Category: Biology Ch 1 Class 12

Malpighian tubules are involved in excretion in:

NTS 2011
Biology
Homeostasis
Elimination Tool:

A) Cockroach

B) Earthworm

C) Human

D) Planaria

4 / 100

Category: Biology Ch 9 Class 11

Which of the following of bryophytes are the simplest one?

Porella

Funaria

Anthocerus

Polytrichum

5 / 100

Category: Biology Ch 5 Class 11

The long chains of HIV-proteins are cut down by proteases enzyme of ______.

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

A) HIV virus

B) Host proteases

C) Both viral and host proteases

D) None of these options is correct

6 / 100

Category: Biology

Genetic information in the DNA is encoded as:

NUMS Mock 1
Biology
Chromosomes and DNA

A) Deoxyribose sugar

B) Ribose sugar

C) Phosphate group

D) Sequence of nitrogenous bases

7 / 100

Category: Biology Ch 6 Class 11

A type of bacterial cell that is completely surrounded by flagella is called:

PMC Practice 5
Biology
Kingdom Prokaryote
Elimination Tool:

A) Diplococcus

B) Tetrad

C) Peritrichous

D) Munotrichous

8 / 100

Category: Biology Ch 2 Class 12

Growth movement caused in response to gravitational stimulus is called:

NTS 2011
Biology
Support and Movement
Elimination Tool:

A) Nutation

B) Geotropism

C) Nastic movement

D) Tropic movement

9 / 100

Category: Biology Ch 5 Class 12

Leukaemia is associated with an increased number of _____ in blood.

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

A) Erythrocytes

B) Basophils

C) Eosinophils

D) Leucocytes

10 / 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

11 / 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

12 / 100

Category: Biology

Pick the correct option about Drosophila.

NUMS Mock 3
Biology
Variation and Genetics

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

13 / 100

Category: Biology Ch 1 Class 12

Humans maintain their body temperature within a narrow limit due to their _____ characteristics.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Ectothermic

B) Endothermic

C) Heterothermic

D) Hypothermic

14 / 100

Category: Biology Ch 3 Class 11

If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation:

Saturation

Denaturation

Composition

Inhibition

15 / 100

Category: Biology Ch 9 Class 12

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

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Probes

B) Restriction endonuclease

C) Mutated DNA

D) Recombinant DNA

16 / 100

Category: Biology Ch 10 Class 11

Aschelminthes is also known as

Protozoans

Eumatazoa

Nematodes

Protoctist ancestors

17 / 100

Category: Biology Ch 3 Class 11

The effect of competitive inhibitor on enzyme activity is such that it affects which of the following?

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) Increases enzyme activity

B) Doesn't change enzyme activity

C) Decreases enzyme activity

D) None of these options is correct

18 / 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

19 / 100

Category: Biology Ch 5 Class 12

The cells in our body are all genetically identical, apart from the:

PMC 2020
Biology
Growth and Development
Elimination Tool:

A) Somatic cells

B) Reproductive cells

D) White blood cells

C) Muscle fibers

20 / 100

Category: Biology Ch 8 Class 12

Hybrid black Guinea pigs are crossed with each other. The resulting offsprings will be:

NUMS 2016
Biology
Variation and Genetics
Elimination Tool:

A) All black

B) All white

C) 3 black, 1 white

D) 3 white, 1 black

21 / 100

Category: Biology Ch 5 Class 11

Closely related species are grouped together into ______ .

NTS 2012
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) families

B) orders

C) phyla

E) genus

22 / 100

Category: Biology Ch 2 Class 12

The number of muscles in a human body is about:

NTS 2012
Biology
Support and Movement
Elimination Tool:

A) 200

B) 300

C) 400

E) 600

23 / 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

24 / 100

Category: Biology Ch 6 Class 12

Haploid and monoploid numbers of chromosomes of hexaploid wheat are:

NTS 2014
Biology
Chromosomes and DNA
Elimination Tool:

A) 21 and 42

B) 7 and 21

C) 21 and 7

D) 42 and 21

25 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria do not have flagella commonly?

Cocci

Bacilli

Streptobacilli

Vibrio

26 / 100

Category: Biology Ch 12 Class 11

Amylase is not produced by the following type(s) of salivary gland:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

27 / 100

Category: Biology Ch 10 Class 11

The name animal is derived from the word.

Anima

Anemia

Aname

All of these

28 / 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

29 / 100

Category: Biology Ch 9 Class 12

Chimaeric DNA is also known as

Recombinant DNA

Complementary DNA

Vector

Plasmid

30 / 100

Category: Biology Ch 2 Class 12

Bones of the skull are joined by:

NTS 2011
Biology
Support and Movement
Elimination Tool:

A) Fixed joints

B) Sliding joints

C) Pivot joints

D) Hinge joints

31 / 100

Category: Biology Ch 10 Class 12

Which of the following is a vestigial organ?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Teeth

B) Nails

C) Body hair

D) Ears

32 / 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

33 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

34 / 100

Category: Biology Ch 13 Class 11

Water is _____ times viscous than air

1000

5000

8000

35 / 100

Category: Biology Ch 6 Class 11

Which of the following is not a component of extracellular matrix in bacteria?

NUMS 2015
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cell wall

B) Slime

C) Capsule

D) Cell membrane

36 / 100

Category: Biology Ch 12 Class 11

Digestion of which food components starts from the oral cavity?

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Proteins

B) Fats

D) Vitamins

C) Carbohydrates

37 / 100

Category: Biology

Q.67 Interaction between genes occupying different loci is:

A. Dominance

B. Pleiotropy

C. Epistasis

D. Gene linkage

38 / 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

39 / 100

Category: Biology Ch 10 Class 12

The ultimate source of all changes is:

NUMS 2015
Biology
Evolution
Elimination Tool:

A) Mutation

B) Migration

C) Genetic drift

D) Change in allele frequency

40 / 100

Category: Biology Ch 7 Class 11

Which of the following statements is correct?

NUMS 2017
Biology
Kingdom Protista
Elimination Tool:

A) Viruses have their own ribosomes for protein formation

B) New viral ribosomes are formed after viral DNA enters the cell

C) Viruses do not need ribosomes for protein formation

D) Viruses use the host ribosomes for their own requirements

41 / 100

Category: Biology Ch 1 Class 12

The active uptake of sodium in the ascending limb or thick loop of Henle is promoted by the action of:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Thyroxine

C) ADH

D) Cortisone

42 / 100

Category: Biology

Which of the following blood transfusions can be made safely?

NUMS Mock 2
Biology
Variation and Genetics

A) Group A to group B

B) Group B to group AB

C) Group AB to group O

D) Group A to group O

43 / 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)

44 / 100

Category: Biology Ch 1 Class 12

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment

Trimethyl alanine

Ammonia

Trimethylamine oxide

45 / 100

Category: Biology

Q.47 The chemical nature of oxytocin is:

A. Protein

B. Amino acid derivative

C. Polypeptide

D. Steroid Incorrect

46 / 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

47 / 100

Category: Biology Ch 12 Class 11

Ileum is about ______ long:

NTS 2010
Biology
Nutrition
Elimination Tool:

A) 3.6 centimeters

B) 3.6 mllimeters

C) 3.6 inches

D) 3.6 meters

48 / 100

Category: Biology Ch 5 Class 12

The cells that play a vital role in the differentiation of various body parts are called:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Ectodermal cells

B) Mesodermal cells

C) Endodermal cells

D) All of the above

49 / 100

Category: Biology Ch 13 Class 12

The position of an organism in a food chain of an ecosystem called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Level of ecosystem

B) Food chain

C) Food web

D) Trophic level

50 / 100

Category: Biology Ch 6 Class 12

The chromosomes with equal arms are called:

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Metacentric

B) Submetacentric

C) Acrocentric

D) Telocentric

51 / 100

Category: Biology

Q.15 Genes that affect growth rate in humans influencing both weight and height are?

A. Codominant

B. Epistasis

C. Polygene

D. Pleiotrop

52 / 100

Category: Biology Ch 1 Class 12

________ are animals that do not adjust their internal osmolality and are isotonic with their environment.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Osmoconformers

B) Osmoregulators

C) Thermoregulators

D) Thermoconformers

53 / 100

Category: Biology Ch 10 Class 12

According to the theory of natural selection, organisms produce:

UHS 2019
Biology
Evolution
Elimination Tool:

A) Offspring according to the resources available

B) Offspring to create resources

C) To create resources

D) More offspring than supported

54 / 100

Category: Biology

Which type of protein structure contains the three dimensional structure?

NUMS Mock 3
Biology
Biological Molecules

A) Primary

B) Secondary

C) Tertiary

D) Quaternary

55 / 100

Category: Biology Ch 11 Class 11

Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.

Organic

Energy rich

Energy poor

Reduced

56 / 100

Category: Biology Ch 7 Class 11

Chalk is gradually formed of dead

Actinopods

Foraminiferans

Apicomplexans

Radiolarians

57 / 100

Category: Biology

The enzyme found in saliva responsible for the digestion of carbohydrates is:

NUMS Mock 4
Biology
Enzymes

A) Lysozyme

B) Amylase

C) Pepsin

D) Trypsinogen

58 / 100

Category: Biology Ch 7 Class 12

At the beginning of nuclear division, the number of microtubule triplets in two pairs of centrioles that migrate to opposite poles are:

UHS 2015
Biology
Cell Cycle
Elimination Tool:

A) 9

B) 18

C) 108

D) 36

59 / 100

Category: Biology Ch 12 Class 11

Which of the following are animals with pointed ends and a tube like digestive tract?

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

A) Annelida

B) Arthropoda

C) Nematoda

D) Mollusca

60 / 100

Category: Biology Ch 3 Class 12

The sense organs of taste in tongue are known as:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Olfactory receptors

B) Gustatory receptors

C) Cutaneous receptors

D) All of these

61 / 100

Category: Biology Ch 12 Class 11

Certain types of whales are also ______ feeder.

Fluid

Macrophagous

Filter

None of these

62 / 100

Category: Biology

Q.28 The vocal cords are stretched across:

A. Larynx

B. Glottis

C. Pharynx

D. Trachea

63 / 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

64 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of triploblasts.

All of them have blood vascular system

They may be coelomate pseudocoelomate or acoelomate

They are included in grade bilateria

All of them have digestive system

65 / 100

Category: Biology Ch 2 Class 12

Endoskeleton is secreted by:

Ectoderm

Endoderm

Mesoderm

All of these

66 / 100

Category: Biology Ch 5 Class 11

It is very stable and allows viruses to exist in water, air, and the ground.

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

A) Nucleoproteins

B) Nucleocapsid

C) Tail of virus

D) Capsid

67 / 100

Category: Biology Ch 1 Class 11

A series of hypothesis supported by the results of many tests is called

Scientific law

Theory

Deduction

68 / 100

Category: Biology Ch 6 Class 11

Spirochaete bacterium Treponema Pallidum causes ______.

NTS 2016 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

A) Gonorrhea

B) Syphilis

C) Genital herpes

D) AIDS

69 / 100

Category: Biology Ch 6 Class 11

The size of Spirochete is

0.1 -600 um

100-200 nm

500 um

0.75-1.25 um

70 / 100

Category: Biology Ch 9 Class 12

Lambda phage is

Virus

Bacterium

Plasmid

Host cell

71 / 100

Category: Biology

Q.23 Reflex action is type of

A. Voluntary action

B. Involuntary action

C. Saltatory conduction

D. None of these

72 / 100

Category: Biology Ch 7 Class 12

Interphase of meiosis lacks

G0 phase

G1 phase

G2 phase

S phase

73 / 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

74 / 100

Category: Biology Ch 9 Class 12

Protoplasts are plant cells from which

. Cell walls are removed

Nucleus is removed

New organelles are added

Vacuoles are taken out

75 / 100

Category: Biology

Q.55 Immunogen is a foreign substance and stimulates the formation of:

A. Antitoxins

B. Antiserum

C. Antibodies

D. Lymph

76 / 100

Category: Biology Ch 5 Class 12

Plasticity of cell wall increases during

Cell maturation

Cell elongation

Cell differentiation

Cell division

77 / 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

78 / 100

Category: Biology Ch 2 Class 11

Glucose and fructose join together through _____ to form sucrose.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 1, 4 glycosidic linkage

B) 1, 6 glycosidic linkage

C) 1,2 glycosidic linkage

D) 1,3 glycosidic linkage

79 / 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

80 / 100

Category: Biology Ch 10 Class 12

The organs which are similar in function but differ in structure are called:

PMC 2020
Biology
Evolution
Elimination Tool:

A) Analogous organs

B) Homologous organs

C) Convergent evolution

D) Divergent evolution

81 / 100

Category: Biology Ch 12 Class 11

Optimum pH for action of pepsin and salivary amylase is

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

A) 3.5 and 7.7 respectively

B) 1.8 and 6.8 respectively

C) 6.8 and 7.4 respectively

D) 1.8 and 7.4 respectively

82 / 100

Category: Biology Ch 6 Class 11

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch?

A specific organism can always be found in association with a given disease

The organism can be isolated and grown in pure culture in the laboratories

The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

It is possible to recover the organism in pure culture from the experimentally infected animals.

83 / 100

Category: Biology Ch 11 Class 11

Molecular formula of chlorophyll ‘a’ molecule is:

C55H72O5N4Mg

C55H70O6N4Mg

C50H72O6N4Mg

C55H70O5N4Mg

84 / 100

Category: Biology Ch 7 Class 12

Meiosis occur in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

85 / 100

Category: Biology Ch 12 Class 11

Magnesium is present in which of the following?

Cytochromes

ATP

Chlorophyll

Haemoglobin

86 / 100

Category: Biology Ch 5 Class 12

Apical meristems are located at

Tips of leaves

Tips of flowers

Tips of roots and stems

Tips of roots only

87 / 100

Category: Biology Ch 2 Class 11

Ribosomes are composed of almost an equal amount of:

NUMS 2018
Biology
Biological Molecules
Elimination Tool:

A) Protein & Lipid

B) Protein & RNA

C) RNA & Lipid

D) RNA & Carbohydrates

88 / 100

Category: Biology Ch 2 Class 11

The cell wall of most of the bacteria have a unique macromolecule called_______.

NTS 2012
Biology
Biological Molecules
Elimination Tool:

A) Cellulose

B) Chitin

C) Fibres

E) Peptidoglycan

89 / 100

Category: Biology Ch 9 Class 12

Cloning is a form of:

NUMS 2016
Biology
Biotechnology
Elimination Tool:

A) Parthenogenesis

B) Apomixis

C) Sexual reproduction

D) Asexual reproduction

90 / 100

Category: Biology Ch 4 Class 12

Testes are structures that produce:

NTS 2015 SMBBMC
Biology
Reproduction
Elimination Tool:

A) Spores

B) Sperms

C) Seeds

D) Ova

91 / 100

Category: Biology Ch 1 Class 12

Which one is not a nitrogen waste?

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Hypoxanthine

B) Xanthophyll

C) Adenine

E) Citrulline

92 / 100

Category: Biology Ch 10 Class 12

Neo-Darwinism has integrated discoveries and ideas from

Taxonomy

Paleontology

Genetics

All of these

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

Q43 Which cells produce oogonia in ovary?

A. Stromal cells

B. Epithelial cells

C. Germ cells

D. Theca cells

95 / 100

Category: Biology Ch 9 Class 12

Passive immunity is used against:

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) Malaria

B) Typhoid

C) Dengue

D) Tetanus

96 / 100

Category: Biology Ch 3 Class 12

All of the following hormones are secreted from anterior lobe of pituitary gland BUT:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Somatotropin hormone

B) Thyroid stimulating hormone

C) Antidiuretic hormone

D) Gonadotrophic hormone

97 / 100

Category: Biology Ch 5 Class 12

Over-secretion of cortical hormone causes a disease called;

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Cushing’s Disease

B) Diabetes Mellitus

C) Hypoglycemia

D) Addison’s Disease

98 / 100

Category: Biology Ch 8 Class 12

A cross between F1 hybrids and either of parents is called:

NUMS 2014
Biology
Variation and Genetics
Elimination Tool:

A) Back cross

B) Test cross

C) Reverse cross

D) None of the above

99 / 100

Category: Biology Ch 2 Class 11

Reactions in which simple substances are combined to form complex substances are called:

Metabolic reactions

Catabolic reactions

Anabolic reactions

None of these

100 / 100

Category: Biology Ch 14 Class 11

Regarding structure of the human heart, Chordae Tendinae are present in:

PMC 2020
Biology
Transport
Elimination Tool:

A) Atria

B) Pulmonary valve

D) Aortic valve

C) Ventricles

Your score is

The average score is 61%

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