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 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.

2 / 100

Category: Biology

Mutations can occur in:

NUMS Mock 4
Biology
Chromosomes and DNA

A) DNA

B) Protein

C) RNA

D) A and C

3 / 100

Category: Biology

An example of competitive inhibition of an enzyme is the inhibition of;

NUMS Mock 2
Biology
Enzymes

A) Succinic dehydrogenase by malonic acid

B) Cytochrome oxidase by cyanide

C) Hexokinase by glucose

D) Carbonic anhydrase by carbon dioxide

4 / 100

Category: Biology Ch 12 Class 11

Absorption of digested food occurs mainly in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Colon

B) Small intestine

C) Large intestine

D) Stomach

5 / 100

Category: Biology Ch 11 Class 12

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

Species

Family

Community

Biomes

6 / 100

Category: Biology Ch 14 Class 11

The massive accumulation of blood with is a tissue is called as:

NTS 2011
Biology
Transport
Elimination Tool:

A) Haemorrhage

C) Hepatoma

B) Haematoma

D) Haemocoel

7 / 100

Category: Biology

In human gut, chylomicrons are formed by the combination of:

NUMS Mock 1
Biology
Nutrition

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

8 / 100

Category: Biology Ch 5 Class 12

Meristems are of

. Two types

Three types

Four types

Five types

9 / 100

Category: Biology Ch 5 Class 11

What type of virus is the smallpox virus?

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

A) DNA enveloped virus

B) RNA enveloped virus

C) DNA virus

D) RNA naked virus

10 / 100

Category: Biology Ch 10 Class 12

Theory of Lamarck was based on:

NTS 2011
Biology
Evolution
Elimination Tool:

A) Adaptive modifications

B) Adaptive radiations

C) Both A and B

D) None of the above

11 / 100

Category: Biology Ch 9 Class 11

The zygote formed in liverworts is

Unicellular

Mulicellular

Multinucleate

None of these

12 / 100

Category: Biology Ch 10 Class 11

Which of the following phylum and its examples is NOT correct?

NUMS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) Nematoda… Ascaris and hookworm

B) Annelid … Nereis and leech

C) Echinodermata … sea star and brittle star

E) Cnidaria … Euplectell and bath sponge

13 / 100

Category: Biology Ch 2 Class 11

Human cells maintain concentration gradients across their plasma membranes, such that there is a high sodium concentration outside the cell and a high potassium concentration inside the cell.

Suppose that within the cell membrane are sodium leak channels or carrier proteins. These channels would allow sodium to:

NTS 2017
Biology
Biological Molecules
Elimination Tool:

A) move out of the cell by simple diffusion

B) move into the cell by simple diffusion

C) move out of the cell by facilitated diffusion

D) move into the cell by facilitated diffusion

14 / 100

Category: Biology Ch 14 Class 11

The lymph vessels empty in:

NUMS 2015
Biology
Transport
Elimination Tool:

A) Arteries

B) Veins

C) Capillaries

D) None of the given options

15 / 100

Category: Biology

Q.30 Arterial blood contains ___________of CO2/100 ml of blood:

16 / 100

Category: Biology

Q.13 Cellulose is the major component of?

A. Primary wall

B. Secondary wall

C. Middle lamella

D. All of these

17 / 100

Category: Biology Ch 10 Class 11

Which one of the following animals possesses an open circulatory system:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Amoeba

B) Earthworm

C) Grasshopper

D) Man

18 / 100

Category: Biology Ch 10 Class 12

Lamarck is best known for his theory of:

NUMS 2016
Biology
Evolution
Elimination Tool:

A) Inheritances

B) Dominance

C) Inheritance of acquired characteristics

D) All of the above

19 / 100

Category: Biology

Which of the following enzymes is used to join DNA fragments?

NUMS Mock 4
Biology
Chromosomes and DNA

A) DNA polymerase

B) Ligase

C) Primase

D) Endonuclease

20 / 100

Category: Biology Ch 12 Class 11

Which type of mucosa cells secrete pepsinogen?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Zymogen

B) Oxyntic

C) Mucous

D) Gastric

21 / 100

Category: Biology Ch 10 Class 11

Aschelminthes is also known as

Protozoans

Eumatazoa

Nematodes

Protoctist ancestors

22 / 100

Category: Biology Ch 14 Class 11

What will happen, if there is an increase in plasma albumin?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Increased blood pressure

B) Increased rate of heart

C) Greater accumulation of tissue fluid

D) Decreased filtration in glomerulus

23 / 100

Category: Biology

Which of the following is correct in humans?

NUMS Mock 1
Biology
Reproduction

A) Both sperm and egg contain yolk

B) All genetic information comes from sperm

C) Sperm contains little cytoplasm

D) Fertilization commonly occurs in the uterus

24 / 100

Category: Biology Ch 5 Class 11

Virus is a _____ entity among living and non-living.

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

A) Balanced

B) Transitional

C) Threshold

D) None of these options is correct

25 / 100

Category: Biology Ch 5 Class 11

Chicken pox is caused by:

NTS 2011
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Hepatitis A virus

B) Varicella zoster virus

C) Influenza virus

D) Human immunodeficiency virus

26 / 100

Category: Biology

The element in basic structure of proteins which differentiate them from carbohydrates is?

NUMS Mock 1
Biology
Biological Molecules

A) Carbon.

B) Hydrogen.

C) Nitrogen.

D) None of these options is correct.

27 / 100

Category: Biology Ch 9 Class 12

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

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Gel electrophoresis

B) Polymerase chain reaction

C) DNA extraction

D) Recombination

28 / 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

29 / 100

Category: Biology Ch 3 Class 11

During feedback inhibition, which of the following structural part of enzyme is involved?

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Active site

B) Binding site

C) Catalytic site

D) Allosteric site

30 / 100

Category: Biology Ch 14 Class 11

Anti-bodies are produced by:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Red blood cells

B) Platelets

C) B-lymphocytes

D) Hormones

31 / 100

Category: Biology

The table shows the characteristics of the blood in one blood vessel in the body.

Which blood vessel contains blood with these characteristics?

NUMS Mock 1
Biology
Transport

A) Aorta

B) Pulmonary artery

C) Pulmonary vein

D) Vena cava

32 / 100

Category: Biology Ch 5 Class 11

The size of smallest virus is:

10 nm

20 nm

30 nm

40 nm

33 / 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

34 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

35 / 100

Category: Biology Ch 7 Class 12

In which stage of meiotic division centromere divides?

NUMS 2017
Biology
Cell Cycle
Elimination Tool:

A) Anaphase I

B) Anaphase II

C) Metaphase II

D) Both A and B

36 / 100

Category: Biology Ch 13 Class 12

Total area of the world under cultivation is

11%

21%

31%

37 / 100

Category: Biology Ch 6 Class 11

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

PMC 2020
Biology
Kingdom Prokaryote
Elimination Tool:

A) Steam

B) Dry heat

C) Filtration

D) Radiation

38 / 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

39 / 100

Category: Biology

_________ is sometimes given by injection as an emergency treatment in cardiac arrest:

NUMS Mock 3
Biology
Coordination and Control

A) Acetylcholine

B) Dopamine

C) Serotonin

D) Epinephrine

40 / 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

41 / 100

Category: Biology

Q.39 The fertilization of ovum takes place at:

A. Distal part of the oviduct

B. Proximal part of the oviduct

C. Middle part of the oviduct

D. Anywhere in the oviduct

42 / 100

Category: Biology Ch 10 Class 11

The name animal is derived from the word.

Anima

Anemia

Aname

All of these

43 / 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

44 / 100

Category: Biology Ch 10 Class 11

The system well – developed in the acoelomate is

Excretory system

Nervous system

Both of these

Transport system

45 / 100

Category: Biology Ch 4 Class 11

Which of the following cell organelles involved in the synthesis of cell wall and middle lamella?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endoplasmic reticulum

B) Golgi apparatus

C) Lysosomes

D) Peroxisomes

46 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

G1 phase

S phase

G2 phase

G0 phase

47 / 100

Category: Biology Ch 9 Class 12

Chemical nature of primers used in the PCR process is _______.

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) RNA

B) Protein

C) Carbohydrate

D) DNA

48 / 100

Category: Biology Ch 4 Class 11

DNA is found in which of the following structures?

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Golgi complex

B) Lysosomes

C) Mitochondria

D) Ribosomes

49 / 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

50 / 100

Category: Biology Ch 4 Class 11

Which property of water helps to maintain the integrity of lipid-containing membranes?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Specific Heat Capacity

B) Hydrogen Bonding

C) Cohesion and Adhesion

D) Hydrophobic exclusion

51 / 100

Category: Biology Ch 9 Class 11

Antheridia and archegonia are born on _____ in bryophytes

Sporophyte

Gametophyte

Both of these

None of these

52 / 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

53 / 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

54 / 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

55 / 100

Category: Biology Ch 1 Class 12

Which of the following marine fishes are considered direct descendents of fresh water ancestors?

Hagfish

Jelly Fish

Star Fish

Bony fishes

56 / 100

Category: Biology Ch 3 Class 12

Which type of sensory structures carry deep pressure and vibration sensations?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

none of these.

57 / 100

Category: Biology

The type of plastids found in roots of plants are _____.

NUMS Mock 4
Biology
Cell Structure and Function

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) All of these options are correct

58 / 100

Category: Biology

Q.1 In all plants the major sites of photosynthesis are?

A. Leaf

B.Stems

C. Roots

D. Branches

59 / 100

Category: Biology Ch 4 Class 12

Female rabbits are:

NUMS 2014
Biology
Reproduction
Elimination Tool:

A) induced ovulators

B) spontaneous ovulators

C) seasonal ovulators

D) indifferent ovulators

60 / 100

Category: Biology

Optimum pH for action of pepsin and salivary amylase is

NUMS Mock 2
Biology
Nutrition

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

61 / 100

Category: Biology Ch 7 Class 12

Crossing over is an exchange of genes between _______ resulting in a mixture of parental characteristics in offspring.

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Sister Chromatids

B) Non-homologous Chromosomes

C) Sex chromosomes

D) Homologous chromosomes

62 / 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

63 / 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

64 / 100

Category: Biology Ch 2 Class 11

% of water in brain cells is

20%

80%

85%

90%

65 / 100

Category: Biology

This theory says that “mitochondria and chloroplasts are, in effect, ancient bacteria which now live inside the larger cells”:

NUMS Mock 2
Biology
Evolution

A) Darwin’s theory of evolution

B) Lamarckism

C) Neo – darwinism

D) Endosymbiont theory

66 / 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

67 / 100

Category: Biology Ch 5 Class 12

In some cases, the blastomere can produce complete embryo so, the cleavage will be:

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Spiral and determinate

B) Spiral and indeterminate

C) Radial and determinate

D) Radial and indeterminate

68 / 100

Category: Biology Ch 9 Class 11

What is the name of the structure of the leaf that attaches the leaf to the stem?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) Phloem

B) Mesophyll

C) Xylem

D) Petiole

69 / 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

70 / 100

Category: Biology Ch 6 Class 11

Purple non-sulphur bacteria is an example of which of the following?

PMC Practice 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Heterotrophic bacteria

B) Saprotrophic bacteria

C) Chemosynthetic bacteria

D) Photosynthetic bacteria

71 / 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

72 / 100

Category: Biology Ch 3 Class 12

Which of the following neurotransmitters function, both as neurotransmitter and hormones, decreasing our perception of pain?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Epinephrine

B) Serotonin

C) Dopamine

D) Endorphins

73 / 100

Category: Biology Ch 9 Class 12

First restriction enzyme was isolated by

Kary Mullis B

Hamilton O. Smith

Maxam Gilbert

Hamilton John

74 / 100

Category: Biology Ch 8 Class 12

An X to A ratio of ⅖ in drosophila produces:

NUMS 2020
Biology
Variation and Genetics
Elimination Tool:

A) Sterile female

B) Fertile female

C) Male

D) Both male and female but sterile

75 / 100

Category: Biology Ch 8 Class 11

Fungi can tolerate pH from

3?7

2?6

2?9

. 3?6

76 / 100

Category: Biology

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

A. Acetylcholine

B. Serotonin

C. Dopamine

D. Adrenaline

77 / 100

Category: Biology Ch 1 Class 12

Most of the marine invertebrates are

Osmoconformers

Osmoregulators

Both depend upon the concentration of sea water

None of these

78 / 100

Category: Biology Ch 13 Class 11

During inspiration, the space inside the chest cavity is increased due to:

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) The relaxation of the muscles of the diaphragm

B) Relaxation of the external intercostal muscles

D) The contraction of the muscles of the diaphragm

C) Increased pressure

79 / 100

Category: Biology Ch 3 Class 12

Which hormone is chemically a steroid?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) ADH

B) Thyroxin

C) Cortisone

D) Insulin

80 / 100

Category: Biology Ch 2 Class 12

Exoskeleton of a marine snail is composed of

CaPO4

CaCO3

CaSO4

SiO2

81 / 100

Category: Biology Ch 2 Class 11

Lecithin is formed by combining phosphatidic acid with ______:

NUMS 2020
Biology
Biological Molecules
Elimination Tool:

A) Serine

B) Choline

C) Inositol

D) Ethanolamine

82 / 100

Category: Biology Ch 2 Class 11

Reactive parts of an amino acid are:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Alpha carbon & amino group

C) Carboxyl & R group

B) Amino group & carboxyl group

D) R group & alpha carbon

83 / 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

84 / 100

Category: Biology Ch 3 Class 11

In which of the following location enzymes controlling cellular respiration are present?

Nucleus

Chlorophast

Milochondria

Ribosome

85 / 100

Category: Biology Ch 9 Class 11

Which of the following statement about plants is incorrect?

All are eukaryotes

They are multicellular.

Non-motile organisms

Are heterotrophes

86 / 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

87 / 100

Category: Biology

Q3 Assymetrical body is a feature of phylum

A. Annelida

B. Arthropoda

C. Porifera

D. Cnidaria

88 / 100

Category: Biology Ch 8 Class 12

When both the alleles of a gene pair are same, the organism is said to be:

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) Heterozygous

B) Genotype

C) Homozygous

D) Phenotype

89 / 100

Category: Biology Ch 6 Class 12

The diploid human chromosome set has:

NTS 2016 SMBBMC
Biology
Chromosomes and DNA
Elimination Tool:

A) 22 pairs of autosomes and 1 pair of sex chromosomes

B) 22 pairs of autosomes and XY chromosomes

C) 22 pairs of autosomes and XX chromosomes

D) Haploid somatic cells and diploid germinal cells

90 / 100

Category: Biology Ch 11 Class 11

Which of the following is a chemical link between catabolism and anabolism?

AMP

ADP

ATP

All of these

91 / 100

Category: Biology Ch 10 Class 11

Pseudo coelomate animals are:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Coelenterates

B) Nematodes

C) Annelids

D) None of them

92 / 100

Category: Biology Ch 9 Class 12

A method of DNA sequencing in which DNA threads are chemically cut into pieces of different sizes is

Sanger's method

Maxam-Gilbert method

Hamilton's method

Vortex method A

93 / 100

Category: Biology

Q.23 During inspiration, the diaphragm:

A. Contracts

B. Relaxes

C. Contracts and relaxes

D. None of these

94 / 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

95 / 100

Category: Biology Ch 9 Class 12

A single stranded nucleotide sequence that will hybridize into a certain piece of DNA is

Primer

Probe

Genome

Both a & b

96 / 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

97 / 100

Category: Biology

HIV is a:

NUMS Mock 3
Biology
Bio-diversity | Variety of Life

A) Virus

B) Prions

C) Viroid

D) Venom

98 / 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.

99 / 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

100 / 100

Category: Biology Ch 3 Class 12

The directional movement toward or away from the stimulus is called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Tropism

B) Orientation

C) Taxi

D) Non orientation

Your score is

The average score is 61%

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