Biology Practice Test 1

Created by Ali Durrani

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1 / 100

Category: Biology

Which one of the following is common to all neurons?

NUMS Mock 3
Biology
Coordination and Control

A) A cell body which contains a nucleus

B) A thick myelin sheath

C) Presence of node of Ranvier

D) Presence of Schwann cells

2 / 100

Category: Biology Ch 14 Class 11

Which of the following is NOT a part of the immune system?

NTS 2018
Biology
Transport
Elimination Tool:

A) Phagocytes

B) Complement Proteins

C) Cytokines

D) Atherosclerosis

3 / 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

4 / 100

Category: Biology Ch 2 Class 11

Among the most abundant biomolecules, _____ is the most abundant one on earth.

NUMS 2016
Chemistry
Biological Molecules
Elimination Tool:

A) Proteins

B) Carbohydrates

C) Lipids

D) Vitamins

5 / 100

Category: Biology Ch 9 Class 11

Sporophyte is

Monoploid

Haploid

Diploid

Polyploidy

6 / 100

Category: Biology Ch 1 Class 12

In plants which of the following is a waste product produced both during photosynthesis and respiration

CO2

H2O

O2

Both A and B

7 / 100

Category: Biology Ch 12 Class 11

Fear of getting obese is termed as:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Bulimia nervosa

B) Anorexia nervosa

C) Dyspepsia

D) Obesity

8 / 100

Category: Biology Ch 14 Class 11

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

NTS 2012
Biology
Transport
Elimination Tool:

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

9 / 100

Category: Biology Ch 12 Class 11

Strong chlorosis is due to the deficiency of _____ in plants.

Magnesium

Nitrogen

Potassium

Phosphorus

10 / 100

Category: Biology Ch 14 Class 11

Humoral immunity is carried by a special group of cells called:

NTS 2017
Biology
Transport
Elimination Tool:

A) B-cells

B) Killer cells

C) Helper cells

D) Null cells

11 / 100

Category: Biology Ch 2 Class 11

NAD is an example of:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Mononucleotide

B) Dinucleotide

C) Trinucleotide

D) Tetranucleotide

12 / 100

Category: Biology Ch 3 Class 11

Which type of bonds are never formed when a substrate fits into the active site of an enzyme?

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) Hydrogen bonds

B) Ionic interactions

C) Hydrophobic interactions

D) Covalent linkages

13 / 100

Category: Biology Ch 9 Class 11

Horsetails are included in class

Sphenopeida

Lycopsida

Psilopsida

Pteropsida

14 / 100

Category: Biology

Q.38 Which of the following best describes a coenzyme?

A. Covalently bonded non-protein part of an enzyme

B. Cofactor consists of metal ions

C. Loosely bonded non-protein part of an enzyme

D. Both A and B

15 / 100

Category: Biology Ch 9 Class 12

Organisms that have had a foreign gene inserted into them are

Transformed organisms

Transgenic organisms

Transfigured organisms

Recombinant organisms

16 / 100

Category: Biology Ch 8 Class 12

Two animals are mated. One is homozygous dominant for one character and homozygous recessive for another. The other animal Is heterozygous for both characters. How many phenotypes are expected in the offspring of this cross?

NTS 2016 DUHS & JSMU
Biology
Variation and Genetics
Elimination Tool:

A) 1

B) 2

C) 3

D) 4

17 / 100

Category: Biology

Q.31 Due to short distance between lungs and heart, walls of right ventricle are:

A. Thicker than left ventricle

B. Thicker than right atrium

C. Thinner than right atrium

D. Thinner than left ventricle

18 / 100

Category: Biology Ch 5 Class 12

The process of aging:

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) Can be slowed down by adequate sleep

B) Can be slowed down by regular meals

C) Cannot be slowed down in any way

D) can be slowed by adequate sleep and regular meal

19 / 100

Category: Biology

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

A. Endocytosis

B. Pinocytosis

C. Phagocytosis

D. Exocytosis

20 / 100

Category: Biology Ch 6 Class 11

Some bacteria ranging occasionally a size of 500 ?m in length are

Escherichia coli

Spirochetes

Mycoplasma

Epulopiscuim

21 / 100

Category: Biology

Q.2 The set of all genes in any population is termed as?

A. population pool

B. species pool

C. gene pool

D. all of these

22 / 100

Category: Biology Ch 5 Class 11

Which of the following category is most general with its members lest resembling with each other than the other categries:

Species

Genus

Family

Order

23 / 100

Category: Biology

The diagram represents two liquids, separated by a membrane through which osmosis can occur.

What movement of molecules will occur?

NUMS Mock 3
Biology
Transport

A) Molecules of dissolved substance move from left to right.

B) Molecules of dissolved substance move from right to left.

C) Overall, water molecules move from left to right.

D) Overall, water molecules move from right to left.

24 / 100

Category: Biology Ch 1 Class 12

Humans are:

NUMS 2016
Biology
Homeostasis
Elimination Tool:

A) Ammonotelic

B) Ureotelic

C) Uricotelic

D) None of these

25 / 100

Category: Biology Ch 4 Class 11

Which of the following statement(s) is/are correct regarding a nucleus?

I.Stores wastes and other Substances

II.Contains genetic material

III.Helps in cellular transport system

IV.Control centre of the cell

NTS 2017
Biology
Cell Structure and Function
Elimination Tool:

A) I only

B) I&II

C) II & III

D) II & IV

26 / 100

Category: Biology Ch 6 Class 11

A bacterium with tuft of flagella at both poles is called

Lophotrichus

Monotrichous

Peritrichous

Amphitrichous

27 / 100

Category: Biology Ch 14 Class 11

The valve between right atrium and right ventricle is called:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Bicuspid valve

B) Tricuspid valve

C) Pulmonary valve

D) Semi lunar valve

28 / 100

Category: Biology Ch 1 Class 11

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by

Environmental biologist

Paleontologist

Marine biologist

Social biologist

29 / 100

Category: Biology Ch 2 Class 12

Endoskeleton is secreted by:

Ectoderm

Endoderm

Mesoderm

All of these

30 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

31 / 100

Category: Biology

Choose the term from the following which is NOT a part of gene therapy?

NUMS Mock 2
Biology
Biotechnology

A) Bone marrow transplant

B) Retrovirus

C) DNA Fingerprinting

D) Somatic cells

32 / 100

Category: Biology Ch 10 Class 12

Important point/s of Lamarck’s theory

Use and disuse of organs

Inheritance of acquired characters

Natural selection

Both a and b

33 / 100

Category: Biology

Nitrogen-cycle is facilitated by ______.

NUMS Mock 3
Biology
Ecosystem

A) Algae

B) Fungi

C) Bacteria

D) Virus

34 / 100

Category: Biology Ch 1 Class 12

In osmosis water molecules move from area of _______ to _______ through semipermeable memberane

Higher solute concentration to lower solute concentration

Lower solute concentration to higher solute concentration

Lower solvent concentration to higher solvent concentration

All of these

35 / 100

Category: Biology Ch 3 Class 11

If another molecule, having a shape very similar to the enzymes substrate, binds to its active site, it would then ____ the enzyme’s function:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Fasten

B) Inhibit

C) Reverse

D) Decrease

36 / 100

Category: Biology Ch 10 Class 11

Which one of the following coelenterate is also called the Portuguese man of war?

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Hydra

B) Velella

C) Obelia

D) Physalis

37 / 100

Category: Biology Ch 3 Class 11

Identify the wrong statements.

(a) The substrate binds to active site of enzyme and not fitting into active site

(b) The binding of substrate induces the enzyme to alter its shape

(c) Chemical bonds of substrate break down not to form new enzyme-product complex

(d) The enzyme releases the products of the reaction and runs through catalytic cycle once again

NUMS 2019 Reconduct
Biology
Enzymes
Elimination Tool:

A) A, C

B) B, D

C) B, C

D) A, D

38 / 100

Category: Biology Ch 14 Class 11

The only vein in human carrying oxygenated blood is:

PMC 2020
Biology
Transport
Elimination Tool:

A) Femoral

B) Pulmonary

C) Real

D) Iliac

39 / 100

Category: Biology Ch 12 Class 11

Nitrogen

Magnesium

Iron

Both A and B

40 / 100

Category: Biology

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

A. Plastoquinone

B. Cytochrome complex

C. Plastocyanin

D. Ferredoxin

41 / 100

Category: Biology Ch 12 Class 11

Certain types of whales are also ______ feeder.

Fluid

Macrophagous

Filter

None of these

42 / 100

Category: Biology Ch 4 Class 11

It is the non living component of the cell, it is secreted and maintained by the living portion of the cell and is found only in plants. What is this structure?

NTS 2015 SMBBMC
Biology
Cell Structure and Function
Elimination Tool:

A) Golgi apparatus

B) lysosome

C) mitochondrion

D) cell wall

43 / 100

Category: Biology Ch 4 Class 11

70S sized ribosomes are found in the cytoplasm of:

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Algae

B) Fungi

C) Protozoans

D) Bacteria

44 / 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

45 / 100

Category: Biology Ch 13 Class 11

The number of stomata present per cm2 of leaf is:

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Less than 100

B) 1,000 to 60,000

C) One million

D) None of the above

46 / 100

Category: Biology Ch 3 Class 11

Upon increasing the temperature the shape of enzyme’s active site?

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) remains same

B) denatures

C) adopts a geometric conformation

D) dissolves

47 / 100

Category: Biology Ch 13 Class 11

The structural and functional unit of the lungs is:

PMC Practice 2
Biology
Gaseous Exchange
Elimination Tool:

A) Alveoli

B) Trachea

C) Bronchiole

D) Bronchus

48 / 100

Category: Biology Ch 10 Class 12

Which condition can be explained by Lamarckism?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) How giraffes got their long neck

B) How humans lost their tail

C) How humans became bipedal

D) all of these

49 / 100

Category: Biology Ch 2 Class 12

Which of the following statement about an arthropod exoskeleton is incorrect?

It permits gaseous exchange.

It contains joints, for the same purpose as present in human skeletal system.

It provides muscle attachment.

Like all the other types of exoskeleton, they lack sensation.

50 / 100

Category: Biology Ch 10 Class 12

In the Hardy – Weinberg principle,p2 + 2pq + q2= ?

NTS 2016 SMBBMC
Biology
Evolution
Elimination Tool:

A) 0

B) 1

C) Infinity

D) Any value between 0 to 1

51 / 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

52 / 100

Category: Biology Ch 7 Class 12

If a person has 44 autosomes + XXY, he will suffer from

UHS 2012
Biology
Cell Cycle
Elimination Tool:

A) Klinefelter’s syndrome

B) Down’s syndrome

C) Turner’s syndrome

D) Edward’s syndrome

53 / 100

Category: Biology Ch 9 Class 12

DNA polymerase enzyme for PCR is isolated from bacteria, Thermus aquaticus, because;

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) It can work at high speed.

B) It can withstand high denaturation temperature.

C) It can withstand low denaturation temperature.

D) It can be used again and again.

54 / 100

Category: Biology Ch 5 Class 11

The size of smallest virus is:

10 nm

20 nm

30 nm

40 nm

55 / 100

Category: Biology Ch 5 Class 12

Secondary growth is actually

Extension of plant body

Increase in thickness

Production of leaves and flowers

None of these A

56 / 100

Category: Biology Ch 3 Class 12

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

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Acetylcholine

B) Dopamine

C) Serotonin

D) Epinephrine

57 / 100

Category: Biology Ch 13 Class 11

Diaphragm is a sheet of:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Smooth muscles

B) Cardiac muscles

C) Skeletal muscles

D) All of these

58 / 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

59 / 100

Category: Biology Ch 3 Class 11

The enzyme in breast milk that causes the coagulation of milk or forms precipitates of milk is:

NUMS 2016
Biology
Enzymes
Elimination Tool:

A) Renin

B) Trypsin

C) Amylase

D) Lipase

60 / 100

Category: Biology

Q.5 Which statement is incorrect?

A. In short day plants red light prevents flowering

B. In long day plants for red light promotes flowering

C. Leaf unrolling occurs in grasses

D. Henbane is a short-day plant

61 / 100

Category: Biology Ch 12 Class 11

Useful bacteria at the large intestine of humans produce:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Vitamin K

B) Vitamin E

C) Vitamin D

D) Vitamin C

62 / 100

Category: Biology Ch 14 Class 11

All of the following protect the body against the entrance of germs except:

NTS 2017
Biology
Transport
Elimination Tool:

A) Tears

B) Mucous membranes

C) Ciliated cells

E) Red blood cells,

63 / 100

Category: Biology

_______ is involved in lipid synthesis/metabolism.

NUMS Mock 4
Biology
Cell Structure and Function

A) Smooth endoplasmic reticulum

B) Rough endoplasmic reticulum

C) Mitochondria

D) Vacuoles

64 / 100

Category: Biology Ch 3 Class 12

Chemically auxins are

Indole propionic acid.

Indole carboxylic acid.

Indole acetaldehyde

Indole acetic acid

65 / 100

Category: Biology Ch 1 Class 12

Secondary cell wall of sclerenchyma cells is impregnated with

Cellulose

Peptidoglycan and murein.

Lignin

Pectin

66 / 100

Category: Biology Ch 3 Class 12

How many meninges cover the human brain?

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) 5

B) 4

C) 3

D) 2

67 / 100

Category: Biology

Q.54 First cardiac sound is associated with:

A. Closure of tricuspid and bicuspid valves

B. Closure of semilunar valves

C. Opening of tricuspid valves

D. Opening of semilunar valves

68 / 100

Category: Biology Ch 3 Class 11

Non-protein but inorganic, detachable co-factors are called ______:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Activators

B) Prosthetic groups

C) Coenzymes

D) Apo-enzymes

69 / 100

Category: Biology

Which of the following statements are true for mitochondria and chloroplasts?

A. ATP synthesis is seen in both
B. Outer membrane has more surface area in both
C. Circular naked DNA, RNA, and 70 ribosomes are seen in both
D. Oxidative phosphorylation occurs in both

NUMS Mock 4
Biology
Cell Structure and Function

A) A and B

B) B and C

C) A and C

D) A and D

70 / 100

Category: Biology Ch 7 Class 12

Synaptonemal complex helps in:

NUMS 2014
Biology
Cell Cycle
Elimination Tool:

Bac

A) Gamete formation

B) Recombination during cell division

C) Production of enzymes during cell division

D) Chromosomal movement towards pole

71 / 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

72 / 100

Category: Biology Ch 10 Class 12

Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

NTS 2014
Biology
Evolution
Elimination Tool:

A) 1 and 2

B) 1 and 3

D) 2 and 3

E) 3 and 4

73 / 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

74 / 100

Category: Biology Ch 7 Class 11

Identify the correctly matched pair relating to a term and its meaning/function/example:

NTS 2017
Biology
Kingdom Protista
Elimination Tool:

A) nitrogen cycle… Rhizopus

B) denitrifying bacteria..change protein to ammonia

C) biosphere.. where life exists

D) lithosphere…water,air and soil.on the surface of earth

75 / 100

Category: Biology Ch 11 Class 11

In paper chromatography xanthophyll will give ______ color:

NTS 2010
Biology
Bioenergetics
Elimination Tool:

A) Orange

B) Grey

C) Yellow

D) Blue-Green

76 / 100

Category: Biology

When the concentration of the external medium is equal to the concentration of the internal medium of a cell, the situation is called:

NUMS Mock 1
Biology
Biological Molecules

A) Hypertonic

B) Hypotonic

C) Isotonic

D) Heterotonic

77 / 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

78 / 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

79 / 100

Category: Biology

The causes of Cyanosis include:

NUMS Mock 2
Biology
Transport

A) Deficiency of vitamin C

B) Varicella-zoster virus

C) Degeneration of the cartilage of joints

D) Ventricular septum defect

80 / 100

Category: Biology

Q.24 When was the bacteriopbage phenomena rediscovered by D’Herelle?

A. 1918

B. 1917

C. 1920

D. 1990

81 / 100

Category: Biology

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

NUMS Mock 1
Biology
Nutrition

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

82 / 100

Category: Biology Ch 1 Class 12

Which of the following statement about Homeostasis is incorrect

There is a definite control system that regulates the homeostatic activities

Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment

Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment

All are correct

83 / 100

Category: Biology Ch 2 Class 12

How many metacarpals are present In the hand?

NTS 2013
Biology
Support and Movement
Elimination Tool:

A) 4

B) 3

C) 6

D) 5

84 / 100

Category: Biology Ch 2 Class 11

Water acts as a universal solvent because of:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Heat of vaporization

B) Hydrogen bonding

C) High polarity

D) Cohesion and adhesion

85 / 100

Category: Biology Ch 13 Class 12

Wild life refers to

All plants of the world

All non cultivated plant

Non domesticated animals

Both b and c

86 / 100

Category: Biology

The hormone which controls the uptake of Sodium ions in kidney and its maintenance in blood plasma is:

NUMS Mock 2
Biology
Coordination and Control

A) Somatotrophic Hormone

B) Aldosterone Hormone

C) Gonadotrophic Hormone

D) Thyroxine Hormone

87 / 100

Category: Biology Ch 13 Class 11

Water is _____ times viscous than air

50

1000

5000

8000

88 / 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

89 / 100

Category: Biology Ch 11 Class 11

The end product of Glycolysis is:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Glucose-6-phosphate

B) Fructose-6-phosphate

C) Pyruvate

D) 3-Phosphoglycerate

90 / 100

Category: Biology Ch 11 Class 12

Study of a single population’s relationship to its environment is called

Ecology

Synecology

Autecology

Niche

91 / 100

Category: Biology Ch 5 Class 11

The word which E-Chatton suggested for bacteria and blue green algae was:

Autotrophs

Heterotrophs

Pro-cariotique

Eu-cariotique

92 / 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

93 / 100

Category: Biology

The thick filaments, in a myofibril of muscles, are made of ________.

NUMS Mock 3
Biology
Support and Movement

A) Myoglobin

B) Myosin

C) Actin

D) Haemoglobin

94 / 100

Category: Biology Ch 2 Class 11

The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:

High specific heat of vaporization

High specific heat capacity

Its Dipole nature

Its liquid state

95 / 100

Category: Biology Ch 5 Class 12

Cells elongate by

Mitosis

Uptake of water

Stretching

Formation of cell wall

96 / 100

Category: Biology

Q.26 The function/s of HCl during digestion is/are:

A. Adjust the pH

B. Softens the food

C. Activate pepsinogen to pepsin

D. All A, B, C

97 / 100

Category: Biology Ch 2 Class 11

Peptide bonds are formed between:

NUMS 2014
Biology
Biological Molecules
Elimination Tool:

A) Hydrogen groups of adjacent amino acids

B) Non-functional groups of the amino acids

C) Carboxyl groups and amino groups

D) Functional groups and hydrogen groups of adjacent amino acids

98 / 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

99 / 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

100 / 100

Category: Biology Ch 7 Class 11

Which of the following is divided by fission?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Viruses

B) Viroids

C) Bacteria

D) Fungus

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3 responses to “Biology Practice Test 1”