Biology Practice Test 1

Created by Ali Durrani

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1 / 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

2 / 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

3 / 100

Category: Biology

Q.34 What molecule would you not expect to find in a refrovirus

A. Adenine

B. Thymine

C. Uracil

D Guanine

4 / 100

Category: Biology Ch 6 Class 11

The function of a cell wall in prokaryotes is:

PMC Practice 1
Biology
Kingdom Prokaryote
Elimination Tool:

A) To give cells rigidity

B) To give specific shape

C) To protect from osmotic lysis

D) All of Above

5 / 100

Category: Biology

Q.29 Fluid secreted by Sertoli cells provides sperms with which of the following ?

A. Liquid medium

B. Protection

C. Nourishment

D. All of these

6 / 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

7 / 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

8 / 100

Category: Biology Ch 2 Class 11

Which chemical component has the greatest contribution in the total mammalian cell weight?

Proteins

Carbohydrate

Lipids

Water

9 / 100

Category: Biology Ch 13 Class 12

Study of environmental relations is called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Physiology

B) Pulmonology

C) Morphology

D) Ecology

10 / 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.

11 / 100

Category: Biology Ch 6 Class 12

Chromosome is made of

2 chromatids +1 centromere +secondary constriction

1 chromated + 1 centromere + primary constriction

2 chromatids + 1 centromere + primary constriction

2 chromatids + 2 centromere + secondary constriction

12 / 100

Category: Biology Ch 2 Class 12

The plants having thick cuticle, needle like reduced leaves and sunken stomata are termed as:

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Hydrophytes

B) Neophytes

C) Mesophytes

D) Xerophytes

13 / 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

14 / 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

15 / 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

16 / 100

Category: Biology Ch 8 Class 11

Foliose lichen are

Stem like

Branching

Leaf like

Crust like

17 / 100

Category: Biology Ch 13 Class 12

Greenhouse gases are those that:

NUMS 2015
Biology
Man and His Environment
Elimination Tool:

A) Prevent entry of ultraviolet rays

B) Prevent rainfall

C) Prevent heat to escape

D) All given options are correct

18 / 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

19 / 100

Category: Biology Ch 11 Class 11

NAD is an example of ______:

NUMS 2020
Biology
Bioenergetics
Elimination Tool:

A) Mononucleotide

B) Dinucleotide

C) Tri nucleotide

D) Tetra nucleotide

20 / 100

Category: Biology Ch 11 Class 11

Which of the following statement about the head of a chlorophyll molecule is incorrect:

It is a porphyrin ring or tetrapyrrole ring structure

It is flat, square and light absorbing

Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

It is hydrophobic

21 / 100

Category: Biology

The system responsible for fighting the pathogens is:

NUMS Mock 4
Biology
Transport

A) Muscular System

B) Endocrine System

C) Nervous System

D) Immune System

22 / 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

23 / 100

Category: Biology Ch 2 Class 11

Each β – chain of hemoglobin molecules contains ____ amino acids.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 136

B) 146

D) 288

C) 235

24 / 100

Category: Biology Ch 6 Class 11

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

NTS 2016 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

A) Stationary phase

B) LAG phase

C) Decline phase

D) LOG phase

25 / 100

Category: Biology Ch 11 Class 11

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Respiration

26 / 100

Category: Biology

Q.41 Corpus luteum is yellow glandular mass and is important source of:

A. Estrogen

B. FSH

C. Testosterone

D. Progesterone

27 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

2

3

5

4

28 / 100

Category: Biology Ch 12 Class 11

Nitrogen

Magnesium

Iron

Both A and B

29 / 100

Category: Biology Ch 9 Class 11

Antheridia and archegonia are _____ organs in bryophytes.

NTS 2015 DUHS and JSMU
Biology
Kingdom Plantae
Elimination Tool:

A) Reproductive

B) digestive

C) respiratory

D) none of the above

30 / 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

31 / 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

32 / 100

Category: Biology Ch 5 Class 11

The genome of the virus includes the:

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

A) Deoxyribonucleic acid

B) Ribonucleic acid

C) Amino acids

D) Deoxyribonucleic acid and ribonucleic acids

33 / 100

Category: Biology Ch 9 Class 12

Chimaeric DNA is also known as

Recombinant DNA

Complementary DNA

Vector

Plasmid

34 / 100

Category: Biology Ch 5 Class 11

Binomial nomenclature was proposed for the first time by:

NTS 2010
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Charles Darwin (1859)

B) Rudolph virchow (1855)

C) Louis Pasteur (1862)

D) Carolus Linnaeus (1707)

35 / 100

Category: Biology Ch 4 Class 11

Which of the following are related to the synthesis of excretory protein by the cell?

NUMS 2019 Cancelled
Biology
Cell Structure and Function
Elimination Tool:

A) Cell membranes

B) Rough Endoplasmic Reticulum

C) Smooth Endoplasmic Reticulum

D) Centrioles

36 / 100

Category: Biology Ch 4 Class 12

Which characteristic is not of identical twins

. Produced by separation of two blastomeres

Have different genetic makeup

Produced asexually

Produced when embryo is at two cell stage

37 / 100

Category: Biology Ch 4 Class 11

The most abundant organic compounds in a mammalian cell are:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Water

B) Lipids

C) Carbohydrates

D) Proteins

38 / 100

Category: Biology

They serve as a scaffold for formation of higher order chromatin structure:

NUMS Mock 2
Biology
Cell Structure and Function

A) Nucleosome

B) Nucleus

C) Chromosomes

D) Histones

39 / 100

Category: Biology Ch 9 Class 12

Which of the following is the manipulation of genetic material for practical purposes?

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Grafting

B) Tissue Culture

C) Genetic Engineering

D) Cell Culture

40 / 100

Category: Biology Ch 9 Class 11

Why do Bryophytes and ferns both require water for fertilization?

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Ciliated spermatozoa instead of flagellated spermatozoa

B) Sporophyte as the main generation instead of the gametophyte generation

D) Non-motile eggs

C) Flagellated spermatozoa can travel

41 / 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

42 / 100

Category: Biology

Which component enters into mitochondria after glycolysis?

NUMS Mock 1
Biology
Bioenergetics

A) Pyruvate

B) Acetate

C) Oxaloacetate

D) Acetyl – CoA

43 / 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

44 / 100

Category: Biology

The Latin words of the name given to a human being, Homo Sapiens, include the:

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

B) Family and order

C) Order and class

D) Genus and class

E) Genus and species

45 / 100

Category: Biology

Q.12 In enzymatic mechanism, the substrate bind to enzyme active site to produce?

A. Reactants

B. Enzyme

C. Products

D. all of these

46 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

47 / 100

Category: Biology Ch 6 Class 11

The process of recombination in prokaryotes takes place in which of the following ways?

PMC Sample 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) transformation

B) conjugation

C) transduction

D) all of these

48 / 100

Category: Biology Ch 10 Class 11

The radial symmetry is found in the animals of

Protozoa

Porifera

Cnidaria

All of these

49 / 100

Category: Biology Ch 9 Class 11

Which of the following is included in Bryophytes?

NTS 2011
Biology
Kingdom Plantae
Elimination Tool:

A) Mosses

B) Club mosses

C) Ferns

D) Seed plants

50 / 100

Category: Biology Ch 2 Class 12

Which of the following sets of bones does not included in the axial skeleton?

NUMS 2019 Cancelled
Biology
Support and Movement
Elimination Tool:

A) Cranium and facial bones

B) Sternum, ribs, vertebrae

C) Lumbar, Thoracic and pelvic bones

D) Pectoral girdles, pelvic girdle, and appendages

51 / 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

52 / 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

53 / 100

Category: Biology Ch 7 Class 11

Freshwater protozoans pump out excess water by a special structure called:

NUMS 2017
Biology
Kingdom Protista
Elimination Tool:

A) Oral groove

B) Contractile vacuole

C) Vesicle

D) Vacuole

54 / 100

Category: Biology Ch 9 Class 12

Golden rice is a promising transgenic crop. When released for cultivation, it will help in

PMC Practice 11
Biology
Biotechnology
Elimination Tool:

A) Producing a petrollike fuel from rice

B) Alleviation of vitamin A deficiency

C) Pest resistance

D) Herbicide tolerance

55 / 100

Category: Biology Ch 5 Class 12

Lateral meristems are present in

All plants

Gymnosperms and dicots

Monocots

In aquatic plants

56 / 100

Category: Biology

Q.12 The least stable RNA present in the cell is:

tRNA

mRNA

rRNA

Micro RNA

57 / 100

Category: Biology Ch 13 Class 11

The irritant substances of smoke cause smoker’s cough which weakened and bursts:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) Bronchi

B) Bronchiole

C) Alveoli

D) Trachea

58 / 100

Category: Biology Ch 4 Class 12

The primary oocyte in mammals has which of the following structures around it:

NUMS 2014
Biology
Reproduction
Elimination Tool:

A) Zona Pellucida

B) Zona Vasculosa

C) Zona radiata

D) None of them

59 / 100

Category: Biology Ch 3 Class 11

Which of the following statements is incorrect?

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) The competitive inhibitor affects the rate of breakdown of the enzyme-substrate complex

B) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate

C) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex

D) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme

60 / 100

Category: Biology

Q.28 The enzyme which plays important role in HIV pathogenesis

A. RNA polymerase I

B. DNA polymerase II

C. Reverse Transcriptase I

D. Reverse Transcriptase

61 / 100

Category: Biology Ch 2 Class 12

Exoskeleton of a marine snail is composed of

CaPO4

CaCO3

CaSO4

SiO2

62 / 100

Category: Biology

Q.32 Lymphocytes are found in:

A. Lymph capillary

B. Lymph vessel

C. Lymph trunk

D. lymph node

63 / 100

Category: Biology Ch 14 Class 11

In the human body, blood circulating from the gut to the heart passes through the:

NTS 2013
Biology
Transport
Elimination Tool:

A) aorta

B) kidneys

D) lungs

C) llver

64 / 100

Category: Biology

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

NUMS Mock 3
Biology
Biotechnology

A) Probes

B) Restriction endonuclease

C) Mutated DNA

D) Recombinant DNA

65 / 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%

66 / 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

67 / 100

Category: Biology Ch 2 Class 12

Which of the following animal has a hydrostatic skeleton:

Earthworm

Round worm

Tape worm.

Pin worm

68 / 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

69 / 100

Category: Biology Ch 4 Class 11

Strengthening material of prokaryotic cell wall is

Cellulose

Chitin

Inorganic salts silica waxes and ligin

Peptidoglycan or Murein.

70 / 100

Category: Biology

Q.11 In cocci, three plane division result in formation of sarcine which is a

A. Cuba of 8 cocci

B. Square of 4 cocci

C. Irregular structure

D. Triangular 6 cocci

71 / 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

72 / 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

73 / 100

Category: Biology Ch 9 Class 11

In Hornworts the band of meristematic tissue is found near

Foot

Gamete producing region

Spore producing region

At junction of a & b

74 / 100

Category: Biology Ch 7 Class 12

Gametes in animals are produced by which of the following?

PMC Practice 2
Biology
Cell Cycle
Elimination Tool:

A) Mitosis

B) Meiosis

C) Fission

D) All of these options are correct

75 / 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

76 / 100

Category: Biology Ch 4 Class 11

Which among the following sentence is not correct about the organelles?

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) They are found in all Eukaryotic cells.

B) They are only found in multicellular organisms.

C) They coordinate to produce the cell.

D) They are small sized and mostly internal.

77 / 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

78 / 100

Category: Biology Ch 3 Class 11

An enzyme increases the speed of a reaction:

NTS 2012
Biology
Enzymes
Elimination Tool:

A) by adding activation energy requirements

B) by lowering the activation energy requirements

C) by decreasing the concentration of products

D) by increasing the concentration of products

79 / 100

Category: Biology Ch 13 Class 12

A lullaby is a song. No song is prose. Some proses are epics.

Conclusions:

I. Some proses are songs.

II. Some epics are lullabies.

III. Some songs are lullabies.

Which of the following is most appropriate in the above case?

a) Only II

b) Only III

c) I, II, and III are inappropriate

a

b

c

none

80 / 100

Category: Biology Ch 11 Class 12

Diverse and stable community at the end of succession is

Diverse Climax communityand stable community at the end of succession is A. Climax community B. Pioneers community C. Top community D. Stable community Answer & Explanation Answer: Option A

Pioneers community

Top community

Stable community A

81 / 100

Category: Biology Ch 2 Class 11

he molecule used by most of the animals for long-term energy storage is:

NUMS 2016
Biology
Biological Molecules
Elimination Tool:

A) Glycogen

B) Starch

C) Fat

D) Cholesterol

82 / 100

Category: Biology Ch 9 Class 12

The deficiency of which of the following cause severe combined immunodeficiency

PMC Sample 3
Biology
Biotechnology
Elimination Tool:

A) hypoxanthine-guanine transferase

B) xanthine oxidase

C) PRPP synthatase

D) adeninosine deaminase

83 / 100

Category: Biology Ch 4 Class 12

In sexual reproduction, plants have diplohaplontic life cycle with alternating

Diploid sporophyte and haploid gametophyte generations

Haploid sporophyte and diploid gametophyte generations

Diploid sporophyte and diploid gametophyte generations

Haploid sporophyte and haploid gametophyte generations

84 / 100

Category: Biology Ch 6 Class 11

The causing agent of the tuberculosis that grows very well in poor living conditions and malnutrition is:

NUMS 2019 Cancelled
Biology
Kingdom Prokaryote
Elimination Tool:

A) Spirobacterium

B) Mycobacterium

C) E.Coli

D) Staphylococcus

85 / 100

Category: Biology

Q.27 During which of the following levels of biological organization can natural selection occur?

A. Gene

B. Individual

C. Group

D. All of these

86 / 100

Category: Biology Ch 14 Class 11

The cells which play a very important role in developing immunity are:

NUMS 2020
Biology
Transport
Elimination Tool:

A) Monocytes

B) Neutrophils

C) Lymphocytes

D) Thrombocytes

87 / 100

Category: Biology

Q.52 The patellar reflex and the Achilles reflex are examples of:

A. Monosynaptic reflex

B. Polysynaptic reflex

C. Hemi Synaptic reflex

D. Both A and B

88 / 100

Category: Biology

Which of the following diseases is sexually transmitted?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

89 / 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

90 / 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

91 / 100

Category: Biology Ch 5 Class 12

Sertoli cells

Provide liquid medium to cells in testes

Provide protection and nourishment to cells

Secrete testosterone

Both a and b

92 / 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

93 / 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

94 / 100

Category: Biology Ch 2 Class 12

Many _______ expel a large amount of water by special structures called contractile vacuoles:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Protozoa

B) Porifera

C) Echinoderm

D) Fish

95 / 100

Category: Biology Ch 3 Class 12

The prolactin hormone, responsible for the activation of mammary glands to start producing milk, is a hormone of the:

NTS 2010
Biology
Coordination and Control
Elimination Tool:

A) Pituitary gland

B) Pancreas

C) Thyroid gland

D) Thymus gland

96 / 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

97 / 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

98 / 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

99 / 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,

100 / 100

Category: Biology Ch 3 Class 11

The optimum pH of catalase is:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Slightly alkaline

B) Highly acidic

C) Highly alkaline

D) Slightly acidic

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3 responses to “Biology Practice Test 1”