Biology Practice Test 3

Biology Practice Test 3 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 genetics, evolution, ecology, biotechnology, and more, helping students improve accuracy and retention.

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1 / 100

Category: Biology Ch 12 Class 12

Which statement about profundal zone is correct?

Plants are unable to anchor but enough light penetrates to support photosynthesis

Phytoplanktons in this region are cyanobacteria

Decomposers and detritus feeders inhabit it

Water lilies are abundant

2 / 100

Category: Biology Ch 5 Class 12

The egg of a chick is laid at which of the following stages?

NTS 2015 DUHS and JSMU
Biology
Growth and Development
Elimination Tool:

A) Gastrula

B) blastula

C) cleavage

D) morula

3 / 100

Category: Biology Ch 10 Class 12

Natural selection can amplify or diminish variations that are

Non heritable

Heritable

Both heritable and non heritable

Acquired

4 / 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

5 / 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

6 / 100

Category: Biology

In chemiosmosis, the proton (H+) moves from _______.

NUMS Mock 4
Biology
Bioenergetics

A) Stroma to Lumen

B) Cytoplasm to Stroma

C) Lumen to Stroma

D) Stroma to cytoplasm

7 / 100

Category: Biology Ch 14 Class 11

About 55% of the volume of the human blood is?

NTS 2015 SMBBMC
Biology
Transport
Elimination Tool:

A) Plasma

B) Blood proteins

C) Blood cells

D) Both B and C

8 / 100

Category: Biology

Q.9 The linkage formed when one molecule of glucose combines with one molecule of fructose is:

A. 1, 2-glycosidic linkage

B. 1, 6-glycosidic linkage

C. 1, 4-glycosidic linkage

D. 1,3-glycosidic linkage

9 / 100

Category: Biology

Q45 During birth which of following act as birth canal?

A. Oviduct

B. Ovary

C. Uterus

D. Vagina

10 / 100

Category: Biology Ch 6 Class 11

Which of the following is not a sterilization method for the control of bacteria?

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Radiation

C) High temperature

B) Filtration

D) Antiseptic

11 / 100

Category: Biology Ch 3 Class 11

The pH at which the activity of pancreatic lipase enzyme is maximum is:

NUMS 2019 Cancelled
Biology
Enzymes
Elimination Tool:

A) 8.00

B) 9.00

C) 7.40

D) 9.20

12 / 100

Category: Biology Ch 4 Class 11

In which model do proteins float in membrane-like iceberg in sea:

NTS 2010
Biology
Cell Structure and Function
Elimination Tool:

A) Lock and key model.

B) Induced fit model.

C) Fluid mosaic model.

D) Lotka volterra model.

13 / 100

Category: Biology Ch 5 Class 11

A combination of alpha interferon and ribavirin is used for the treatment of hepatitis:

NUMS 2020
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) B

B) A

C) D

D) C

14 / 100

Category: Biology Ch 13 Class 11

Vocal cords are stretched across

Larynx

Pharynx

Golttis

None of these

15 / 100

Category: Biology Ch 10 Class 11

Coelom that develops from the archenteron as outpouching is

Pseudocoelom

Enterocoelom

Schizocoelom

None of these

16 / 100

Category: Biology Ch 8 Class 12

If a heterozygous individual shows the complete effect of both alleles, the type of inheritance would be

Complete dominance

Non dominance

Incomplete dominance

Co-Dominance

17 / 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

18 / 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

19 / 100

Category: Biology Ch 11 Class 11

Chlorophyll molecule resemble the haem group of hemoglobin, the main difference between these two molecule is that chlorophyll has ____ ion.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Fe2+

B) Mg2+

C) Mn2+

D) Ca2+

20 / 100

Category: Biology Ch 13 Class 11

Four plants are present in different environmental conditions. Plant A is present in a warm climate with continuous rainfall, plant B is present in a cool forest, plant C is present in a warm climate with little breeze, while plant D is present in a warm climate with high wind speed. Which one of the above plants will have the highest rate of transpiration?

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Plant B

B) Plant D

C) Plant A

D) Plant C

21 / 100

Category: Biology Ch 1 Class 12

Reabsorption of calcium is triggered by:

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Parathormone

C) Antidiuretic

D) Vasopressin

22 / 100

Category: Biology Ch 9 Class 12

Vaccination can be done against:

NUMS 2015
Biology
Biotechnology
Elimination Tool:

A) Bacterial diseases only

B) Viral diseases only

C) Both Viral and Bacterial

D) All type of disease-causing organisms

23 / 100

Category: Biology Ch 13 Class 11

Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Alveoli

C) Chest cage

D) Diaphragm

24 / 100

Category: Biology Ch 4 Class 11

Select the pair of organs, that contains a large number of mitochondria:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Stomach & Liver

B) Muscle & Stomach

C) Heart & Liver

D) Liver & Muscle

25 / 100

Category: Biology Ch 9 Class 11

The zygote formed in liverworts is

Unicellular

Mulicellular

Multinucleate

None of these

26 / 100

Category: Biology

Q.51 The water splitting step of photosynthesis is called?

A Hydrolysis

B. Chemiosmosis

C. Photolysis

D. Photosynthesis

27 / 100

Category: Biology Ch 8 Class 11

In an ecosystem mycorrhizae are an example of:

UHS 2013
Biology
Kingdom Fungi
Elimination Tool:

A) Predation

B) Symbiosis

C) Mutualism

D) Parasitism

28 / 100

Category: Biology Ch 4 Class 11

_______ is involved in lipid synthesis/metabolism.

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Smooth endoplasmic reticulum

B) Rough endoplasmic reticulum

C) Mitochondria

D) Vacuoles

29 / 100

Category: Biology Ch 5 Class 11

Where can viruses replicate?

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

A) Animals

B) Plants

C) Bacteria

D) All of these options are correct

30 / 100

Category: Biology Ch 5 Class 11

Which of the Euglenas (a Protoctista) character resembles that of animals:

They can move

They lack cell wall

They do not have chlorophyll

Both a and b

31 / 100

Category: Biology Ch 8 Class 12

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

One

Two

Three

Four

32 / 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

33 / 100

Category: Biology Ch 13 Class 11

Smaller the animals:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) More rate of respiration

B) Less the rate of respiration

C) Rate of respiration has nothing to do with the size of animal

D) None of these

34 / 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

35 / 100

Category: Biology

Select a method which causes the oxidation of chemical constituent of a bacterial cell:

NUMS Mock 2
Biology
Kingdom Prokaryote

A) Steam

B) Dry heat

C) Filtration

D) Radiation

36 / 100

Category: Biology

Q.53____________________are among smallest known virus

A. Picornavirus

B. Parvoviruses

C. Herpes virus

D. Rotavirus

37 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

G1 phase

S phase

G2 phase

G0 phase

38 / 100

Category: Biology Ch 10 Class 12

The actual remains or traces of organisms that lived in ancident geological times

Vestigial remains

Fossils

Fuel

None of these

39 / 100

Category: Biology Ch 9 Class 11

Leaves of ……….. are used to cure cough and cold in horses.

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Glycyrrhiza glabra

B) Cassia alata

C) Bamboo

D) Both bamboo and Glycyrrhiza glabra

40 / 100

Category: Biology Ch 10 Class 12

A group of populations that have the potential to interbreed in nature is

Genus

Family

Species

Community

41 / 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

42 / 100

Category: Biology Ch 2 Class 12

The significant flight muscle in birds is the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Pectoral

B) Tensor

C) Appendicular

D) All of these

43 / 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

44 / 100

Category: Biology Ch 6 Class 11

A bacterium with tuft of flagella at both poles is called

Lophotrichus

Monotrichous

Peritrichous

Amphitrichous

45 / 100

Category: Biology Ch 13 Class 12

Which of the following statements is true about Savannah?

NTS 2015 DUHS and JSMU
Biology
Man and His Environment
Elimination Tool:

A) Dry season is very long and the temperature ranges more than 18 C throughout the year

B) Its plants do not shed off their leaves

C) The subsoil is permanently frozen

D) Rainfall is up to 200 cm per year

46 / 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

47 / 100

Category: Biology

Q.23 During inspiration, the diaphragm:

A. Contracts

B. Relaxes

C. Contracts and relaxes

D. None of these

48 / 100

Category: Biology Ch 13 Class 11

Which of the following is not an infection of the lungs/respiratory tract?

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

49 / 100

Category: Biology Ch 1 Class 12

The excretory product that requires minimum water for its elimination compared to others is:

NUMS 2017
Biology
Homeostasis
Elimination Tool:

A) Creatinine

B) Ammonia

C) Urea

D) Uric Acid

50 / 100

Category: Biology Ch 8 Class 11

The ecological role of fungi as decomposers is paralleled only by

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Prions

B) Algae

C) Bacteria

D) Viruses

51 / 100

Category: Biology Ch 8 Class 11

An association between two organisms benefiting both is called

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Commensalism

B) Parasitism

C) Predation

D) Symbiosis

52 / 100

Category: Biology Ch 3 Class 11

The Induced fit model was introduced by Koshland in which of the following year?

PMC Sample 1
Biology
Enzymes
Elimination Tool:

A) 1960

B) 1961

C) 1959

D) 1966

53 / 100

Category: Biology Ch 12 Class 11

Which of the following is not the type of cells of gastric gland?

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Zymogenic

C) Sinusoidal

B) Parietal

D) Mucous neck

54 / 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

55 / 100

Category: Biology Ch 7 Class 12

In meiosis II, ______ differentiate into sperms.

NUMS 2019 Reconduct
Biology
Cell Cycle
Elimination Tool:

A) Spermatocytes

B) Spermatids

C) Sertoli cells

D) Polar bodies

56 / 100

Category: Biology Ch 1 Class 12

Deamination in the liver initially produces:

NTS 2010
Biology
Homeostasis
Elimination Tool:

A) Ammonia

B) Arginine

C) Ornithine

D) Urea

57 / 100

Category: Biology Ch 9 Class 12

Enzyme used by the Bacteria to cut the DNA of the invading Virus for its protection is:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction Exonuclease

B) Restriction Ligase

C) Restriction Endonuclease

D) DNA polymerase

58 / 100

Category: Biology Ch 2 Class 11

Which bond provides stability to complex carbohydrate molecules?

C-H

C-O

C-C

C-N

59 / 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

60 / 100

Category: Biology

Q.17 A structural component that is found in all viruses is?

A. envelope

B. DNA

C. Capsid

D. Tail Fibers

61 / 100

Category: Biology Ch 11 Class 12

The biosphere covers about

. 8-10 km

5-10 km

15-30 km

16-20 km

62 / 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

63 / 100

Category: Biology Ch 4 Class 11

A group of ribosomes attached to mRNA is known as

Polymer

Polypeptide

Polysomes

Monomer

64 / 100

Category: Biology Ch 6 Class 11

Which of the following types of bacterial reproduction is most similar to mitosis?

PMC Practice 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Transduction

B) Transfonnation

C) Binary fission

D) Conjugation

65 / 100

Category: Biology

Which trait is not sex-linked recessive:

NUMS Mock 2
Biology
Variation and Genetics

A) Haemophilia

B) Colour blindness

C) Hypophosphatemia

D) TFM syndrome

66 / 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

67 / 100

Category: Biology

The structure of a fibrous protein comprises of polypeptide chains in the form of:

NUMS Mock 2
Biology
Biological Molecules

A) Cluster

B) Spherical or curried up ball

C) Long strands or fibrils

D) Flat uncoiled chains

68 / 100

Category: Biology Ch 6 Class 12

In alkaptonuria

Patient's urine contains homogenetisic acid

Urine becomes black

Both a and b

Urine contains phenylalanine

69 / 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

70 / 100

Category: Biology

Q3 Assymetrical body is a feature of phylum

A. Annelida

B. Arthropoda

C. Porifera

D. Cnidaria

71 / 100

Category: Biology Ch 6 Class 12

A fern has _____ pairs of chromosomes.

NTS 2012
Biology
Chromosomes and DNA
Elimination Tool:

A) 23

B) 40

C) 500

D) 13

72 / 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

73 / 100

Category: Biology

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

A. Protozoans

B. Eumetazoa

C. Protoctist ancestors

D. Nematodes

74 / 100

Category: Biology Ch 8 Class 12

Which of the following characters of pea plant is dominant?

Axial flowers

Yellow pods

White flowers

Wrinkled seeds

75 / 100

Category: Biology Ch 1 Class 12

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

Stem

Leaves

Flowers

Roots

76 / 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

77 / 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

78 / 100

Category: Biology Ch 3 Class 12

The _____ is the main nutritional part and it’s concerned with the biosynthesis of materials necessary for neurons.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Nerves

B) Axon

C) Soma

D) Dendrites

79 / 100

Category: Biology Ch 9 Class 11

Such inflorescence in which the main axis is elongated and bears sessile flowers is called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Raceme

C) Cyme

B) Spike

D) Panicle

80 / 100

Category: Biology

Q.26 Two pea plants are crossed. One plant is homozygous dominant for purple flowers, and the other is homozygous recessive for white lowers. What fraction of the F2 population will have white lowers?

A. 1/4

B. 1/2

C. 1/8

D. 1/16

81 / 100

Category: Biology Ch 7 Class 11

_______ infection is caused by a viroid:

NUMS 2020
Biology
Kingdom Protista
Elimination Tool:

A) Hepatitis A

B) Hepatitis D

D) Mysterious brain infection

C) Mad Cow disease

82 / 100

Category: Biology

Q.5 Evaporation of water from aerial parts of plants is called:

A. ascent ofI Sap

B. deplasmolysis

C. deplasmolysis

D. none of these

83 / 100

Category: Biology Ch 9 Class 11

In plants chlorosis is caused by the deficiency of:

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) chlorophyll

B) magnesium

C) nitrogen

D) all of above

84 / 100

Category: Biology Ch 5 Class 11

The name Bacteriophage was coined by:

Charles Chamberland

Ivanowski

Twort

D Herelle

85 / 100

Category: Biology

Q.23 The vectors for disease spread belong to which of the following phylum?

A. Porifera

B. Platyhelminthes

C. Annelida

D. Arthropoda

86 / 100

Category: Biology Ch 1 Class 12

The characteristic which enable animals to tolerate dehydration is called

Osmoconformation

Osmoregulaton

Anhydrobiosis

Anhydrosis

87 / 100

Category: Biology Ch 3 Class 11

Lock and Key Model for enzyme action propose by Emil Fischer suggests that:

PMC 2020
Biology
Enzymes
Elimination Tool:

A) Enzymes are unbiased for the substrate

B) Enzymes can modify their active sites

C) Enzymes are restricted to one reaction type

D) An enzyme can catalyze variety of reactions

88 / 100

Category: Biology Ch 9 Class 11

Which of the following is an ovoviviparous organism?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) reptiles

B) mammals

C) frog

D) Duckbill platypus

89 / 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

90 / 100

Category: Biology

Q45 Which was the first virus to be successfully crystalized?

A. TMV

B. Smallpox

C. Poliovirus

D. Adenovirus

91 / 100

Category: Biology Ch 6 Class 12

Phenylketonuria is

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

A) Sex linked dominant trait

B) Sex linked recessive trait

C) Autosomal dominant trait

D) Autosomal recessive trait

92 / 100

Category: Biology Ch 9 Class 11

The flower of family gramineae process contain two scales below ovary which are called:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Glumes

B) Lemma and palea

C) Lodicule

D) Rochella

93 / 100

Category: Biology Ch 13 Class 11

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

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Hydrophytes

C) Halophytes

B) Mesophytes

D) Xerophytes

94 / 100

Category: Biology Ch 6 Class 11

Cell wall is only absent in the following group of bacteria;

PMC Practice 6
Biology
Kingdom Prokaryote
Elimination Tool:

A) Staphylococci

B) Pseudomunas

C) Diplococcus pneumonia

D) Mycoplasmas

95 / 100

Category: Biology

Q.7 The thalamus and the hypothalamus are located in which region of the brain?

A. brain stem

B. cerebrum

C. cerebellum

D. Diencephalon

96 / 100

Category: Biology Ch 2 Class 12

Movement of the Hip joint is which type of synovial joints?

NUMS 2018
Biology
Support and Movement
Elimination Tool:

A) Gliding joint

B) Ball and socket joint

D) Hinge joint

C) Pivot joints

97 / 100

Category: Biology

Q4 The branch that deals with the study of viruses fs known as?

A.. Entomology

B. Bacteriology

Virology

D. Epidemiology

98 / 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

99 / 100

Category: Biology Ch 14 Class 11

Antibodies are manufactured in:

PMC 2020
Biology
Transport
Elimination Tool:

A) T Lymphocytes

B) Red Blood Cells

C) Platelets

D) B Lymphocytes

100 / 100

Category: Biology Ch 5 Class 11

Diseases in living organisms which are caused by parasites are called:

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

A) Disinfestations

B) Antisepsis

C) Infections

D) Infestations

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The average score is 59%

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