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 13 Class 11

As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

2 / 100

Category: Biology Ch 13 Class 12

In air % of oxygen and carbon dioxide is

Oxygen 20%, CO2 0.03%

Oxygen 50%, CO2 50%

Oxygen 30%, CO2 0.05%

Oxygen 25%, CO2 0.02%

3 / 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

4 / 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

5 / 100

Category: Biology

Q.58 Which of the following is incorrect for ascent of sap?

A. water potential

B. Cohesion tension

C. root pressure

D. imbibition

6 / 100

Category: Biology

Q.7 A neuron located in the cential hervous system that projects its axon outside the CNS is called:

A. Motor nerve

B. Sensory nerve

C. Both A and B

D. Mixed nerve

7 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

G1 phase

S phase

G2 phase

G0 phase

8 / 100

Category: Biology Ch 5 Class 11

Amoeba belongs to which kingdom:

Prokaryotae

Plantae

Monera

Protista

9 / 100

Category: Biology Ch 10 Class 11

The Porifera are pore – bearing animals, commonly called:

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Corals

B) Sponges

C) Hydras

D) Anemones

10 / 100

Category: Biology Ch 4 Class 12

Viviparous animals are those in which

. Internal fertilization with external development in eggs

Internal fertilization with internal development inside female body

Internal fertilization and internal development followed by hatching of egg

External fertilization with external development

11 / 100

Category: Biology Ch 4 Class 11

Which of the following is NOT the function of cell membranes?

NTS 2018
Biology
Cell Structure and Function
Elimination Tool:

A) Protection of cytoplasm

B) Regulating the passage of different molecules

C) Protein synthesis

D) Cellular communication

12 / 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

13 / 100

Category: Biology Ch 8 Class 12

An Rh negative woman is married to an Rh positive man whose father was also Rh negative. What are the chances that their child will be affected?

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) 25%

B) 50%

C) 75%

D) 100%

14 / 100

Category: Biology Ch 9 Class 11

A sponge of Antarctica which is more than a meter tall is known as?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Euplectella

B) Spongilla

C) Leucosolenia

D) Scolymastra joubini

15 / 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.

16 / 100

Category: Biology

Which of the following transport mechanism induces conformational change in protein?

A. Simple diffusion

B. Facilitated diffusion

C. Active transport

D. Endocytosis

17 / 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

18 / 100

Category: Biology Ch 5 Class 11

HIV is also known as:

NUMS 2014
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) AIDS

B) HAV

D) HBV

C) HTLV

19 / 100

Category: Biology Ch 2 Class 11

Haemoglobin exhibits a:

NUMS 2016
Biology
Biological Molecules
Elimination Tool:

A) Secondary structure

B) Primary structure

C) Quaternary structure

D) Tertiary structure

20 / 100

Category: Biology

Q.22 Which of the following is false about conjugation?

A. It forms a bridge between two bacterial cells

B. It involves transport of genetic material via vectors

C. It is a form of sexual reproduction

D. Both A and B

21 / 100

Category: Biology

Q.24 Pepsinogen is produce by:

A. Mucous cells

B. Zymogen cells

C. Parietal cells

D. None of these

22 / 100

Category: Biology Ch 2 Class 11

The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called?

Specific Heat of Vaporization

Specific Heat capacity

Caloric Heat

Both A and C

23 / 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

24 / 100

Category: Biology Ch 1 Class 11

A large regional community primarily determined by climate is called :

Population

Community

Biome

Habitat

25 / 100

Category: Biology

Q.36 The retinal is important for___________ of human

A. Vision

B. Metabolism

C. Muscle contraction

D. Muscle twitch

26 / 100

Category: Biology Ch 5 Class 12

The individual with harelip shows which of the following conditions?

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Hard palate

B) Polydactyl

D) Microcephale

C) Cleft Palate

27 / 100

Category: Biology

Which valve action results from an increase in pressure in the ventricles of the heart?

NUMS Mock 3
Biology
Transport

A) The closing of all the heart valves

B) The closing of semilunar valves

C) The opening of the bicuspid valve

D) The opening of the semilunar valves

28 / 100

Category: Biology Ch 2 Class 11

Cell wall is made up of:

NUMS 2016
Biology
Biological Molecules
Elimination Tool:

A) Cellulose

B) Cell

C) Ribosomes

D) Penicillin binding protein

29 / 100

Category: Biology Ch 10 Class 12

Mating with non-relatives is known as?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Inbreeding

B) Outbreeding

C) Breeding

D) None of these options is correct

30 / 100

Category: Biology Ch 3 Class 12

Diameter of an artery can be changed by:

NUMS 2015
Biology
Coordination and Control
Elimination Tool:

A) Nervous stimulation

B) Chemical stimulation

C) Both chemical and nervous stimulation

D) None of the given options

31 / 100

Category: Biology Ch 6 Class 11

Which of the following organelles are present in all the bacteria?

NTS 2014
Biology
Kingdom Prokaryote
Elimination Tool:

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

32 / 100

Category: Biology

Q.2 Prokaryotic and eukaryotic cells generally have which of the following features in common?

A. Cell wall made of cellulose

B. Presence of linear chromosome

C. Presence of ribosomes

D. Presence of nucleus

33 / 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

34 / 100

Category: Biology Ch 12 Class 11

Of the following, which one is missing in herbivores?

Premolars

Canines

Incisors

Molars

35 / 100

Category: Biology Ch 4 Class 12

In which organism males are haploid

Aphids

Honey bee

Mosquito

Butterfly

36 / 100

Category: Biology Ch 2 Class 12

The number of vertebrate in horse neck are:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) 5

B) 6

C) 7

D) 10

37 / 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

38 / 100

Category: Biology

Q.57 Which of the following is paired correctly?

A. Pisces-jellyfish

B. Echinodermata- cuttlefish

C. Mollusca- starfish

D. Arthropoda- silver fish

39 / 100

Category: Biology Ch 9 Class 12

Which of the following diseases CANNOT be cured by gene therapy?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) SCID

B) Tuberculosis

C) Cystic fibrosis

D) Cancer

40 / 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.

41 / 100

Category: Biology Ch 7 Class 11

Who first separated bacteria from other protists as a group?

John Hogg

Ernst Haeckel

Margulis and Schwartz

Herbert Copeland

42 / 100

Category: Biology Ch 7 Class 11

Golden algae are also known as

Chrysophyta

Phaeophyta

Pyrrophyta

Rhodophyta

43 / 100

Category: Biology Ch 13 Class 11

Which one of the following is a genetic disorder in which abnormally thick mucus is produced in the lungs and other parts of the body?

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Lung cancer

B) Chronic bronchitis

C) Cystic fibrosis

D) Emphysema

44 / 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

45 / 100

Category: Biology Ch 8 Class 11

Which of the following group represent pathological fungi?

Mushrooms morels and truffles

Rusts smuts and molds

Penicillium

All of these

46 / 100

Category: Biology Ch 4 Class 11

What is the role of cholesterol in the cell membrane?

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) it functions in joining adjacent cells together.

B) It functions in recognizing foreign cells.

C) It increases the rate of transport of ions across the membrane.

D) It stabilizes the cell membrane.

47 / 100

Category: Biology

The secondary and tertiary consumers are also known as:

NUMS Mock 1
Biology
Ecosystem

B) Herbivores

C) Abiotic factors

D) Decomposers

E) Carnivores

48 / 100

Category: Biology

What type of atom is the carbon atom?

NUMS Mock 2
Biology
Biological Molecules

A) Divalent

B) Monovalent

C) Trivalent

D) Tetravalent

49 / 100

Category: Biology Ch 5 Class 12

The disease that arises due to increasing age is:

NTS 2018
Biology
Growth and Development
Elimination Tool:

A) Alzheimer's

B) Hepatitis C

C) Cholera

D) Malaria

50 / 100

Category: Biology Ch 7 Class 12

Condensation of chromosomes reaches to the maximum during:

NUMS 2015
Biology
Cell Cycle
Elimination Tool:

A) Zygote

B) Pachytene

D) Diakinesis

C) Diplotene

51 / 100

Category: Biology

Q.41 The period during which a girl sexually matures is called

A. Menstrual cycle

B. Puberty

C. Childhood

D. Teens

52 / 100

Category: Biology Ch 11 Class 11

Light reaction takes place on/in

Thylakoid

Storma

Chloroplast

Grana

53 / 100

Category: Biology Ch 7 Class 12

Which is a feature of malignant tumor?

Localized

Little deleterious effect

Few mitosis

Metastasize

54 / 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

55 / 100

Category: Biology Ch 6 Class 11

Vibrio cholera is an example of ______ type of bacteria.

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cocci

B) Bacilli

C) Spirilla

D) Commas

56 / 100

Category: Biology Ch 9 Class 12

DNA fingerprinting is basically done for:

NUMS 2015
Biology
Biotechnology
Elimination Tool:

A) DNA cloning

B) DNA analysis

C) DNA sequencing

D) DNA splicing

57 / 100

Category: Biology Ch 10 Class 11

The mammals termed as the connecting link between reptilians and mammals are:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Marsupials

B) Eutherians

C) Monotremes

D) Metatherians

58 / 100

Category: Biology Ch 10 Class 11

What is the correct order of arthropod groups, from those with most legs to those with fewest legs?

NTS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) arachnids … crustaceans … insects … myriapods

B) crustaceans … myriapods … insects … arachnids

C) insects … arachnids … myriapods … crustaceans

E) myriapods … crustaceans … arachnids … insects

59 / 100

Category: Biology Ch 14 Class 11

Consider the following statements regarding blood pressure:

1. It is the pressure exerted by the blood on the walls of any vessel.

2. It decreases in the arteries as the distance from the heart increases.

3. It is lower in the capillaries than in the arteries.

4. It is usually lower in women than in men.

Choose the correct statements.

NTS 2015 DUHS and JSMU
Biology
Transport
Elimination Tool:

A) 1, 2 and 3 are correct.

B) 2, 3 and 4 are correct.

C) 1 and 4 are correct.

D) 1, 2, 3 and 4 are correct.

60 / 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

61 / 100

Category: Biology Ch 6 Class 12

Highly condensed portions of the chromatin are called:

NTS 2011
Biology
Chromosomes and DNA
Elimination Tool:

A) Euchromatin

B) Heterochromatin

C) Nucleosome

D) Super coils

62 / 100

Category: Biology Ch 1 Class 12

The excretion of hypertonic urine in humans is associated best with the:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Glomerular capsule

B) Proximal convoluted tubule

C) Loop of Henle

D) Distal convoluted tubule

63 / 100

Category: Biology Ch 6 Class 12

Which statement is correct?

Leading strand elongates away from the replication fork

Lagging strand elongates towards the replication fork

Lagging strand is constructed discontinuously.

Both a and b

64 / 100

Category: Biology Ch 8 Class 12

In the pea plants, the factors round and yellow seeds (RRYY) is dominant over wrinkled and green seeds (rryy). Keeping this in mind, identify the seed that has the genotype round and green.

NTS 2011
Biology
Variation and Genetics
Elimination Tool:

A) Rryy

B) rrYy

C) RrYy

D) RRYy

65 / 100

Category: Biology Ch 12 Class 12

One of the most important cause of desertification is

Floods

Wind blowing

Raining

Deforestation

66 / 100

Category: Biology

Among the following, which cellular organelle contains circular DNA, similar to those found in bacteria?

NUMS Mock 1
Biology
Cell Structure and Function

A) Lysosome

B) Nucleus

C) Nucleosome

D) Mitochondria

67 / 100

Category: Biology Ch 2 Class 12

Number of bones in the skull:

NUMS 2016
Biology
Support and Movement
Elimination Tool:

A) 22

B) 26

C) 24

D) 28

68 / 100

Category: Biology Ch 5 Class 12

Typical symptoms like enlarged breasts and small testis in male are attributed to:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Down’s Syndrome

B) Turner’s Syndrome

C) Klinefelter’s Syndrome

D) Phenylketonuria

69 / 100

Category: Biology Ch 12 Class 11

Dietary fiber passes through to several structures after leaving the stomach. In which order does the dietary fiber pass through the structures?

NTS 2015 DUHS and JSMU
Biology
Nutrition
Elimination Tool:

A) Duodenum -> jejunum -> ileum -> rectum -> colon

B) ileum -> duodenum -> colon -> jejunum -> rectum

C) ileum -> duodenum -> jejunum -> rectum -> colon

E) duodenum -> jejunum -> ileum -> colon -> rectum

70 / 100

Category: Biology

What is the effect of enzyme DNA ligase?

NUMS Mock 2
Biology
Chromosomes and DNA

A) DNA is broken up at specific sites

B) DNA fragments are joined together

C) DNA replication occurs

D) DNA transcription occurs

71 / 100

Category: Biology

Which one of the following is a fish?

NUMS Mock 3
Biology
Kingdom Animalia

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

72 / 100

Category: Biology Ch 12 Class 11

When the liver fat content of our body increases, the condition leads to:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Fatty liver

B) Necros liver

C) Jaundice

D) None of them

73 / 100

Category: Biology Ch 6 Class 12

Who discovered DNA?

P.A.Levene

Frederick Griffith

Friedrich Miescher

Rosalind Franklin

74 / 100

Category: Biology Ch 6 Class 12

An individual has an additional sex chromosome. Which syndrome does he have?

NUMS 2014
Biology
Chromosomes and DNA
Elimination Tool:

A) Down's syndrome

B) Turner's syndrome

C) Jacob's syndrome

D) Klinefelter's syndrome

75 / 100

Category: Biology Ch 3 Class 11

The structure of an enzyme is altered by:

Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Non-competitive inhibitor

76 / 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

77 / 100

Category: Biology Ch 5 Class 11

Which of the following organisms have Chitin as a major structural component of their cell wall:

Prokaryotae

Protoctista

Plantae

Fungi

78 / 100

Category: Biology

It is a method for rapid production of a very large number of copies of a particular fragment of DNA:

NUMS Mock 2
Biology
Biotechnology

A) Gel electrophoresis

B) Polymerase chain reaction

C) DNA extraction

D) Recombination

79 / 100

Category: Biology Ch 6 Class 11

Which of the following structure provides greater pathogenicity to the bacteria?

Capsule

Slime

Cell Wall

Cell membrane

80 / 100

Category: Biology Ch 4 Class 12

Ovulation is induced by ______ hormone secreted by the pituitary gland.

NUMS 2019 Reconduct
Biology
Reproduction
Elimination Tool:

A) Follicle stimulating

B) Estrogen

C) Luteinizing hormone

D) Progesterone

81 / 100

Category: Biology Ch 4 Class 11

In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon:

Their physical properties like size & weight.

Physical properties of the medium like its density.

Their electrical properties like their charges

Both a and b

82 / 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

83 / 100

Category: Biology Ch 2 Class 12

The muscles attached to the bones are:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Voluntary and smooth

B) Involuntary and smooth

D) Involuntary and striated

C) Voluntary and striated

84 / 100

Category: Biology Ch 9 Class 12

Which of the following characteristics makes plasmid DNA useful for researchers?:

PMC Practice 9
Biology
Biotechnology
Elimination Tool:

A) Readily incorporate cloned DNA

B) Capable of automatic replication

C) Capable of being isolated from genomic DNA

D) All of these

85 / 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

86 / 100

Category: Biology

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

A. Endocytosis

B. Pinocytosis

C. Phagocytosis

D. Exocytosis

87 / 100

Category: Biology Ch 11 Class 11

Its membranes are the sites where sunlight energy is trapped and where glucose is formed.

Which organelle is this?

NUMS 2014
Biology
Bioenergetics
Elimination Tool:

A) Chloroplast

B) Leucoplast

C) Chromoplast

D) Cytosol

88 / 100

Category: Biology Ch 10 Class 12

Key point to Lamarck’s view about organic evolution is that every offspring

NUMS 2014
Biology
Evolution
Elimination Tool:

A) is similar to its parents

B) inherits characters acquired by the parental generation

C) shows struggle for existence

D) repeats phylogeny in its ontogeny

89 / 100

Category: Biology Ch 11 Class 12

Sequence of changes in community and its non-living environment over a period of time is

Niche

Succession

Alterations

Neo-ecology

90 / 100

Category: Biology Ch 3 Class 12

Which of the following is used in brewing industry to promote malting:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

91 / 100

Category: Biology Ch 5 Class 12

A plant has a growth pattern called

Closed growth

Open growth

In between the two

92 / 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

93 / 100

Category: Biology

Q37 The muscle contraction depends on:

A. Nerve impulse

B. Energy

C. Calcium

D. All of these

94 / 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

95 / 100

Category: Biology Ch 14 Class 11

Autoimmune diseases act as the principle of:

PMC 2020
Biology
Transport
Elimination Tool:

A) Self against antigens

C) Self against self

B) Antigen against self

D) Antigen self destroyed

96 / 100

Category: Biology Ch 7 Class 11

This protist has isomorphic alternation of generation:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Phytopthora

B) Chlorella

C) Ulva

D) Euglena

97 / 100

Category: Biology Ch 10 Class 12

Genetic equilibrium is a:

NTS 2019
Biology
Evolution
Elimination Tool:

A) Change of allele and gene frequency in a population

B) Stability of allele and gene quantity in a population

C) Change of allele and gene number in a population

D) Stability of allele and gene frequency in a population

98 / 100

Category: Biology

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

NUMS Mock 1
Biology
Support and Movement

A) Gliding joint

B) Ball and socket joint

C) Pivot joints

D) Hinge joint

99 / 100

Category: Biology

In which of the following phases of bacterial growth, is the death rate more rapid than the multiplication rate?

NUMS Mock 2
Biology
Kingdom Prokaryote

A) Stationary phase

B) LAG phase

C) Decline phase

D) LOG phase

100 / 100

Category: Biology Ch 9 Class 11

In Pakistan, the furniture wood is mainly obtained from the members of family:

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

A) Rosaceae

B) Solanaceae

C) Minosaceae

D) Fabaceae

Your score is

The average score is 61%

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