Biology Practice Test 3

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 3

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1 / 100

Category: Biology Ch 4 Class 11

Chief material present in the cell wall of plants, fungal, and prokaryotic cells is:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Proteins

B) Lipids

C) Polysaccharides

D) Phospholipids

2 / 100

Category: Biology Ch 7 Class 11

In which of the following growth phases, the number of bacteria increases the most rapidly?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Death / Decline phase

3 / 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

4 / 100

Category: Biology Ch 4 Class 11

In which type of cells, cell wall is not present?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Plant cells

B) Fungal cells

C) Bacterial cells

D) Liver cells

5 / 100

Category: Biology Ch 14 Class 11

The chemical nature of an antibody is:

NUMS 2016
Biology
Transport
Elimination Tool:

A) Glycoprotein

B) Glycolipids

C) Lipoproteins

D) Polysaccharides

6 / 100

Category: Biology Ch 14 Class 11

T-Lymphocytes are matured in thymus glands and they are produced in:

NUMS 2016
Biology
Transport
Elimination Tool:

A) Thymus glands

B) Bone marrow

D) Heart

C) Pancreas

7 / 100

Category: Biology Ch 8 Class 12

In nature, Garden pea is

Self-fertilized

Cross fertilized

Cross pollinated

None of these

8 / 100

Category: Biology

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

A. Estrogen

B. FSH

C. Testosterone

D. Progesterone

9 / 100

Category: Biology Ch 4 Class 11

Cellulose is the major component of

Primary wall

Secondary wall

Middle lamella

all of the above

10 / 100

Category: Biology Ch 2 Class 11

Which of the following has the ability to develop ester linkage with OH group of Pentose sugar?

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) Purine

B) Pyrimidine

C) H3PO4

D) HNO3

11 / 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

12 / 100

Category: Biology

Q.17 Teichoic acids are the characters of:

A. Gram Positive bacteria

B. Mycoplasma

C. Gram Negative bacteria

D. Archaeobacteria

13 / 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

14 / 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

15 / 100

Category: Biology Ch 2 Class 11

The disease caused by nutritional deficiency is:

NTS 2018
Biology
Biological Molecules
Elimination Tool:

A) Hepatitis

B) Cholera

C) Malaria

D) Beriberi

16 / 100

Category: Biology Ch 8 Class 12

Continuous variations in a population were first observed by:

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

A) Mendel

B) Correns

C) Nilsson

D) Darwin

17 / 100

Category: Biology Ch 6 Class 12

The chromosomes with equal arms are called:

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Metacentric

B) Submetacentric

C) Acrocentric

D) Telocentric

18 / 100

Category: Biology Ch 3 Class 11

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

Nucleus

Chlorophast

Milochondria

Ribosome

19 / 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.

20 / 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%

21 / 100

Category: Biology Ch 1 Class 11

A series of hypothesis supported by the results of many tests is called

Scientific law

Theory

Deduction

22 / 100

Category: Biology Ch 6 Class 12

Diameter of DNA double helix is:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) 3.4 nm

B) 0.3 nm

D) 0.2 nm

C) 2 nm

23 / 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

24 / 100

Category: Biology

Egg-Laying mammals are called:

NUMS Mock 3
Biology
Reproduction

B) Protozoa

C) Chordata

D) Monotremes

E) Both A and D

25 / 100

Category: Biology Ch 6 Class 11

The bacteria can cope in unfavorable condition by producing:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Mesosomes

B) Zygospores

C) Endospores

D) Hyphae

26 / 100

Category: Biology

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

A. 1918

B. 1917

C. 1920

D. 1990

27 / 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

28 / 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

29 / 100

Category: Biology Ch 2 Class 12

Type of sclerenchyma cells found in seed coats are:

NUMS 2015
Biology
Support and Movement
Elimination Tool:

A) Fibers

B) Tracheids

C) Sclereids

D) Vessels

30 / 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

31 / 100

Category: Biology Ch 2 Class 11

Which of the following carbohydrate is tasteless?

Monosaccharide

Oligosaccharide

Polysaccharide

None of these

32 / 100

Category: Biology Ch 4 Class 12

Which organ(s) in the male reproductive system produce gametes?

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

33 / 100

Category: Biology

Q.9 This is a reduced compound

A. CO2

B. O2

C. NADH

D. NAD

34 / 100

Category: Biology

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

54

50

64

60

35 / 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

36 / 100

Category: Biology Ch 10 Class 12

What was the source of hydrogen for first photosynthetic organisms?

Water

Hydrogen present in soil

Hydrogen sulphate

Hydrogen sulphide

37 / 100

Category: Biology Ch 5 Class 11

The long chains of HIV-proteins are cut down by proteases enzyme of ______.

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

A) HIV virus

B) Host proteases

C) Both viral and host proteases

D) None of these options is correct

38 / 100

Category: Biology Ch 10 Class 12

Which of the following is not an evidence for evolution?

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) Fossil record

B) Common ancestor organisms

C) Vestigial structures

D) none of these

39 / 100

Category: Biology Ch 10 Class 11

Which one of the following is exclusively marine phylum?

NTS 2015 SMBBMC
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Echinodermata

C) Annelida

D) Arthropoda

40 / 100

Category: Biology Ch 13 Class 11

Functional units of lungs are called

Alveoli

Air sacs

Parabronchi

None of these

41 / 100

Category: Biology Ch 4 Class 11

Which one of the following combinations is NOT the part of an animal cell?

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) Central vacuole, Cell Membrane, Ribosomes

B) Chloroplast, Ribosome , Mitochondrion

C) Cell wall, Chloroplast, Central vacuole

D) Ribosome, Mitochondrion, Cell wall

42 / 100

Category: Biology Ch 5 Class 11

Genetically modified plants contain:

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

A) No gene

B) No gene in transposition

C) Widely used in gene transfer

D) All of these options are correct

43 / 100

Category: Biology Ch 4 Class 12

A major constituent of contraceptive pills is:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Progesterone

C) Prolactin

D) Testosterone

44 / 100

Category: Biology Ch 3 Class 11

The optimum pH for the enzyme arginase is which of the following?

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) 9.0

B) 9.3

C) 9.7

D) 10

45 / 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

46 / 100

Category: Biology Ch 13 Class 11

The function of respiratory passage, Cilia is to keep the airways clear of:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Carbon dioxide

B) Oxygen

C) Dust

D) Carbon Monoxide

47 / 100

Category: Biology Ch 2 Class 11

Ptyalin can convert starch into:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Monosaccharide form

B) Oligosaccharide form

C) Polysaccharide form

D) All given options

48 / 100

Category: Biology

Q.59 NADH produced during glycolysis and Krebs cycle will oxidized by:

A. Coenzyme ‘Q’

B. Cytochrome ‘c’

C. Cytochrome ‘b’

D. Cytochrome ‘a’

49 / 100

Category: Biology Ch 6 Class 12

Which of the following is NOT the part of RNA?

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Nitrogenous bases

B) Ribose Sugars

C) Deoxyribose Sugars

D) Phosphate groups

50 / 100

Category: Biology Ch 7 Class 11

The drfinite shape to ciliates is given by

Pellicle

Penicle

Calcium

Cell wall

51 / 100

Category: Biology Ch 1 Class 12

Higher turgor pressure in a plant cell is maintained by:

Large number of vacoules in a plant cell.

Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane

Higher osmotic pressure of the cell vacuole

both b and c

52 / 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

53 / 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

54 / 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

55 / 100

Category: Biology Ch 9 Class 12

Genetic engineering has been successfully used for producing;

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) Animals, with inferior traits.

B) Transgenic mice for testing safety of polio vaccine before use in humans

C) Animals, that have the same genetic constitution.

D) None of the above

56 / 100

Category: Biology Ch 11 Class 11

The main process that occurs in the dark reaction in photosynthesis is:

NTS 2010
Biology
Bioenergetics
Elimination Tool:

A) That water is split.

B) Light energy is converted into chemical energy.

C) That glucose is oxidized.

D) That carbon-dioxide is fixed.

57 / 100

Category: Biology Ch 14 Class 11

Antibodies are actually:

NUMS 2016
Biology
Transport
Elimination Tool:

A) Globular proteins

B) Glycoproteins

C) Fibrous proteins

D) Glycolipids

58 / 100

Category: Biology Ch 9 Class 11

Chlorophyta is considered to be closest to plants but do not resemble plants in having:

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Chlorophyll a and b

B) Starch as stored food

C) Cellulose cell wall

D) Multicellular sex organs

59 / 100

Category: Biology

Q43 Which cells produce oogonia in ovary?

A. Stromal cells

B. Epithelial cells

C. Germ cells

D. Theca cells

60 / 100

Category: Biology

At what point are two populations descending from the same ancestral stock considered separate species?

NUMS Mock 4
Biology
Evolution

A) When they can no longer produce viable, fertile offspring

B) When they look significantly different from each other

C) When they can interbreed successfully and produce offspring

D) When their habitats are separated by a significantly large distance so that they cannot meet

61 / 100

Category: Biology Ch 6 Class 11

Cyanobacteria have which of the following type of cell wall?

PMC Sample 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Gram positive

B) Gram negative

C) Cellulose

D) Acid fast

62 / 100

Category: Biology Ch 2 Class 12

Hinge joint occurs in:

NTS 2015 SMBBMC
Biology
Support and Movement
Elimination Tool:

A) Elbow

B) Skull

C) Ankle

D) Backbone

63 / 100

Category: Biology

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

A. Menstrual cycle

B. Puberty

C. Childhood

D. Teens

64 / 100

Category: Biology Ch 4 Class 12

In asexual reproduction offspring are produced by

Meiosis

Mitosis

Both a and b

None of these

65 / 100

Category: Biology Ch 7 Class 11

Sleeping sickness in humans is caused by:

UHS 2013
Biology
Kingdom Protista
Elimination Tool:

A) Trypanosoma

B) Plasmodium

C) Anopheles

D) Andes

66 / 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

67 / 100

Category: Biology Ch 9 Class 11

The botanical name of Imli is:

NTS 2012
Biology
Kingdom Plantae
Elimination Tool:

A) Cassia fistula

B) Mimosa pudica

C) Tamarindus indica

D) Datura alba

68 / 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

69 / 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

70 / 100

Category: Biology Ch 5 Class 12

Tails can be regenerated in:

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) The larvae of amphibians

B) Lizards

C) Both lizards and the larvae of amphibians

D) None of the given options

71 / 100

Category: Biology

What part of the brain integrates sensory information such as pain and temperature?

NUMS Mock 2
Biology
Coordination and Control

A) Forebrain

B) Midbrain

C) Hindbrain

D) Spinal cord

72 / 100

Category: Biology Ch 1 Class 12

Ammonia is chief excretory product in:

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Reptiles

B) Turtles

C) Mammals

D) Fish

73 / 100

Category: Biology

Q.49 In reproduction, semen refers to which of the following?

A. fluid and sperms

B. Blood and water

C. Blood and sperms

D. Blood and fluid

74 / 100

Category: Biology Ch 10 Class 11

In most triploblasts after embryonic development the three layers are represented as

Separate layers of cells

Structures formed from them

Structures associated with them

Their functions in body

75 / 100

Category: Biology Ch 11 Class 12

Lichen and algae form

Climax community

Pioneers community

Initiator community

Seral community

76 / 100

Category: Biology Ch 12 Class 11

Carbohydrates, fats & proteins are essential for:

Metabolic processes of an organism

Providing energy

Formation of sturctures

All of these

77 / 100

Category: Biology Ch 2 Class 12

Scapula is the bone of the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Skull

B) Pelvic girdle

D) Vertebral column

C) Pectoral girdle

78 / 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

79 / 100

Category: Biology

Lysosomes function in:

NUMS Mock 1
Biology
Cell Structure and Function

A) Protein synthesis

B) Processing

C) Intracellular digestion

D) Lipid synthesis

80 / 100

Category: Biology Ch 5 Class 12

Turner’s syndrome is characterized by having:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Trisomy 21

B) 44 + XXY

C) Trisomy

D) 44 + XO

81 / 100

Category: Biology Ch 1 Class 12

________ are animals that do not adjust their internal osmolality and are isotonic with their environment.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Osmoconformers

B) Osmoregulators

C) Thermoregulators

D) Thermoconformers

82 / 100

Category: Biology Ch 12 Class 11

Food is assimilated into the body from digestive tract in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Esophagus

B) Stomach

C) Small intestine

D) Rectum

83 / 100

Category: Biology Ch 9 Class 11

Which of the following of bryophytes are the simplest one?

Porella

Funaria

Anthocerus

Polytrichum

84 / 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

85 / 100

Category: Biology

During cell division, the spindle fibres get attached to condensing chromosome at a highly differentiated region. This region is called as:

NUMS Mock 1
Biology
Cell Cycle

A) Chromosome

B) Chromocentre

C) Centriole

D) Kinetochore

86 / 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

87 / 100

Category: Biology Ch 12 Class 11

In planaria, numerous small branches which end blindly are called as

Digestive tract

Intestinal caeca

Hepatic caeca

Both B & C

88 / 100

Category: Biology Ch 12 Class 11

Optimum pH for action of pepsin and salivary amylase is

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

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

89 / 100

Category: Biology Ch 10 Class 12

The process that has transformed life on earth from its earliest forms to vast diversity is?

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) mutation

B) evolution

C) migration

D) genetic drift

90 / 100

Category: Biology Ch 8 Class 11

Coenocytic hyphae are also known as

Septate

. Perforated hyphae

Aseptate

Uninucleate hyphae

91 / 100

Category: Biology Ch 2 Class 12

Dermal and denticle scales of fishes are called:

NUMS 2015
Biology
Support and Movement
Elimination Tool:

A) Placoid scales

B) Ganoid scales

C) Ctenoid scales

D) Cycloid scales

92 / 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

93 / 100

Category: Biology

Q.24 Pepsinogen is produce by:

A. Mucous cells

B. Zymogen cells

C. Parietal cells

D. None of these

94 / 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

95 / 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

96 / 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

97 / 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

98 / 100

Category: Biology Ch 7 Class 12

Process of uncontrolled cell division is due to which one of the following reasons?

NUMS 2018
Biology
Cell Cycle
Elimination Tool:

A) DNA replication

B) Mutations

C) Translation

D) Transcription

99 / 100

Category: Biology Ch 9 Class 11

The space between the overtopped dichotomous branches was occupied by a sheet of which cells during evolution of megaphylls?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) Sclerenchyma

B) Parenchyma

C) Collenchyma

D) Chlorenchyma

100 / 100

Category: Biology Ch 4 Class 11

Which of the following cells does not have nucleus?

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Muscle cell

B) Nerve cell

C) White Blood cell

D) Red Blood cell

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