Biology Practice Test 3

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 3

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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 2017
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

2 / 100

Category: Biology

Below the point at which the cotyledons are attached, the embryo axis is called _______.

NUMS Mock 2
Biology
Kingdom Plantae

A) Radicle

B) Epicotyl

C) Hypocotyl

D) Coleoptile

3 / 100

Category: Biology Ch 3 Class 12

Cell membrane under resting conditions is impermeable to all the ions except

Na+

. K+

Cl-

PO4-2

4 / 100

Category: Biology Ch 5 Class 12

Meristems are group of cells that

Allow the surrounding region to divide

Provide nutrition

. Help in movement

Retain the potential to divide

5 / 100

Category: Biology

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

NUMS Mock 4
Biology
Gaseous Exchange

A) Carbon dioxide

B) Oxygen

C) Dust

D) Carbon Monoxide

6 / 100

Category: Biology

The best function of coelom is described as ____.

NUMS Mock 1
Biology
Kingdom Animalia

A) To increase the size of the animals

B) To help in the functioning of reproductive system

C) To provide space for the development of organs and systems

D) All of these options are correct

7 / 100

Category: Biology Ch 1 Class 12

Right kidney is slightly lower than left kidney due to:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Heart

B) Liver

D) Lungs

C) Pancreas

8 / 100

Category: Biology Ch 13 Class 11

Oxygen is transported by combining with ……….. in Hb.

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Nitrogen

B) Iron

D) Hydrogen

C) Carbon

9 / 100

Category: Biology Ch 9 Class 12

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

NTS 2019
Biology
Biotechnology
Elimination Tool:

A) Bone marrow transplant

B) Retrovirus

C) DNA Fingerprinting

D) Somatic cells

10 / 100

Category: Biology Ch 2 Class 12

Which of the following bones are present in the palm of the hand:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Carpals

B) Metacarpals

C) Phalanges

D) Tarsal

11 / 100

Category: Biology Ch 4 Class 12

Which statement is incorrect?

Climacteric is burst of respiratory activity in fruit ripening

It is associated with ethane production C

It helps in fruit set

It helps in fruit ripening

12 / 100

Category: Biology

Which type of protein structure contains the three dimensional structure?

NUMS Mock 4
Biology
Biological Molecules

A) Primary

B) Secondary

C) Tertiary

D) Quaternary

13 / 100

Category: Biology Ch 10 Class 12

Who developed a theory of natural selection essentially identical to Darwin’s

Hardy-Weinberg

Alfred Wallace

Malthus

Lyell

14 / 100

Category: Biology Ch 3 Class 12

Which body function is controlled through a positive feedback mechanism?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Labor contractions

B) Body temperature

C) Insulin production

D) Thyroxine release

15 / 100

Category: Biology Ch 5 Class 12

Vegetative roots and shoots grow by

Determinate growth

Primary growth only

Indeterminate growth

None of these

16 / 100

Category: Biology Ch 2 Class 11

Which of the statement is not true for compounds like glycoprotein and glycolipids?

They are conjugated molecules of carbohydrates

Both have role in the extra cellular matrix of animals and bacterial cell wall

They are components of biological membranes.

Both are produced and secreted by endoplasmic reticulum

17 / 100

Category: Biology Ch 7 Class 12

Synthesis of microtubules increases in:

UHS 2018
Biology
Cell Cycle
Elimination Tool:

A) M phase

B) S phase

C) G1 phase

D) G2 phase

18 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorbs nutrients directly from the living host with the help of special hyphae tips called _______.

NTS 2012
Biology
Kingdom Fungi
Elimination Tool:

A) Roots

B) Root hair

C) Rhizoids

D) Haustoria

19 / 100

Category: Biology Ch 5 Class 12

_____ cells store surplus food and _____ cells produce new cells for growth and development of the plant:

NUMS 2019 Cancelled
Biology
Growth and Development
Elimination Tool:

A) Parenchymatous: meristematic

B) Sclerenchymatous; chlorenchymatous

C) Phloem; Meristematic

D) Parenchymatous; Chlorenchymatous

20 / 100

Category: Biology Ch 6 Class 11

Germ theory was presented by:

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Robert Koch

B) Antonie van Leeuwenhoek

C) Robert Hooke

D) Robert Brown

21 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

2

3

5

4

22 / 100

Category: Biology Ch 10 Class 12

During aristotle time, it was thought that

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) oranisms ranged from simple to complex

B) one type of organisim give rise to another type of organism

D) all living things specially created by nature

C) both a & b

23 / 100

Category: Biology Ch 13 Class 11

The oxygen-binding protein present in skeletal muscles is:

NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:

A) Globin

B) Glycogen

C) Myo Glycogen

D) Myoglobin

24 / 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

25 / 100

Category: Biology Ch 6 Class 12

Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Single ; two

B) Single ; three

C) Triplet ; two

D) Triplet ; three

26 / 100

Category: Biology

Q.49 Another name for the sex cell is:

A. Hormone

B. Gamete

C. Zygote

D. Testicle

27 / 100

Category: Biology Ch 8 Class 12

What is the risk of color blind baby boy in a family when mother is color blind but father is normal?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) 25%

B) 50%

C) 75%

D) 100%

28 / 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

29 / 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

30 / 100

Category: Biology Ch 3 Class 11

Lock and Key Model for enzyme action propose by Emil Fischer suggests that:

PMC 2020
Biology
Enzymes
Elimination Tool:

A) Enzymes are unbiased for the substrate

B) Enzymes can modify their active sites

C) Enzymes are restricted to one reaction type

D) An enzyme can catalyze variety of reactions

31 / 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

32 / 100

Category: Biology Ch 3 Class 12

Which type of the receptors are present in the ear?

Chemoreceptors

Mechanoreceptors

Photoreceptors

Thermoreceptors

33 / 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

34 / 100

Category: Biology Ch 8 Class 11

Constricting ring around nematode is formed by

Arthrobotrys

Pleurotus ostreatus

Mildews

All of these

35 / 100

Category: Biology Ch 10 Class 12

The wings of birds and the forelegs of a horse are _____ structures.

NUMS 2016
Biology
Evolution
Elimination Tool:

A) Analogous

B) Homologous

C) Vestigial

D) Evolutionary convergent

36 / 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

37 / 100

Category: Biology Ch 13 Class 12

Water constitutes –% of body weight?

A. 25-30%

70-90%

10-30%

30-50%

38 / 100

Category: Biology

_____ are more common in human males and females.

NUMS Mock 3
Biology
Variation and Genetics

A) X-linked dominant traits

B) X-linked recessive traits

C) Y-linked dominant traits

D) Autosomal linked recessive traits

39 / 100

Category: Biology

Q.16 Retroviruses have a special enzyme ‘reverse transcriptase’ which can convert ____________into ___________.

A. DNA to DNA

B. RNA to DNA

C. DNA to RNA

D. RNA to RNA

40 / 100

Category: Biology Ch 3 Class 12

The only promoter of leaf senescence in the following plant hormones is:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

41 / 100

Category: Biology

Q.25 The substrate of the trypsin is:

A. Proteins

B. Dipeptides

C. Polypeptides

D. Amino acids

42 / 100

Category: Biology Ch 10 Class 11

Which one of the following is a fish?

NTS 2012
Biology
Kingdom Animalia
Elimination Tool:

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

43 / 100

Category: Biology Ch 7 Class 11

Which of the following is the best desciption of bacteriophage?

PMC Practice 32
Biology
Kingdom Protista
Elimination Tool:

A) Fungus

B) Prokaryote

C) Living organism

D) Obligate intracellular parasite

44 / 100

Category: Biology

Q.22 What are T Cells and their rolelin IHV infection?

A. A type lymphocytes

B. Present in blood and work as detence systein

C.They kill the ioreign invader

D. All of these

45 / 100

Category: Biology

Q.65 Which of the following statements about the systemic affect of bacterial cells are true?

A. Gram-negative bacteria are more likely to cause systemic effects because their lack of an outer membrane means they can more quickly infect host cells.

B. Gram-negative bacteria are more likely to cause Systemic effects because the outer membrane protects them from antibiotics

C. Both A and B

D. None of these

46 / 100

Category: Biology Ch 6 Class 12

In semi-conservative replication

. Sequence of original duplex is conserved after one round of replication

Gererate DNA copies of entirely new molecules

Parental DNA become completely dispersed

Each strand of daughter molecules will be a mixture of old and new

47 / 100

Category: Biology

Q.18 Pick the incorrect pair:

A. Lovastatin – Lowers blood cholesterol

B. Cyclosporine – Prevents transplant rejection

C. Ergotine -Migraine relieve

D. Griseofulvin – Inhibit bacterial growth

48 / 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

49 / 100

Category: Biology Ch 11 Class 12

A dual organism composed of symbiotic association of an alga living within a fungus myceliium is

Mycorrhiza

Rhizobium

Lichen

Legume

50 / 100

Category: Biology

Male and female sea urchins release their sperm and eggs into the water where fertilization takes place. How can their reproduction be described?

NUMS Mock 3
Biology
Reproduction

A) Asexual reproduction which results in genetically dissimilar offsprings

B) Asexual reproduction which results in genetically identical offsprings

C) Sexual reproduction which results in genetically dissimilar offsprings

D) Sexual reproduction which results in genetically identical offsprings

51 / 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

52 / 100

Category: Biology

Q.57 Electron transport chain pumps protons across the membrane from __________ to ____________.

A. Thylakoid space, stroma

B. Inter-membrane space, stroma

C. Stroma, inter-membrane space

D. Stroma, thylakoid space

53 / 100

Category: Biology

Eukaryotic, multicellular, and consumers belong to ______ kingdom.

NUMS Mock 3
Biology
Bio-diversity | Variety of Life

A) Monera

B) Protista

C) Fungi

D) Animalia

54 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called

Mildew

Constricting ring

Haustoria

All of thes

55 / 100

Category: Biology Ch 7 Class 12

Which of the following cells does not enter G0 phase?

NUMS 2020
Biology
Cell Cycle
Elimination Tool:

A) Nerve cells

B) Cells of cornea

C) Cells of lens

D) None of these

56 / 100

Category: Biology Ch 11 Class 12

Wood forests form the

Pioneers community

Climax community

Top community

Transient community

57 / 100

Category: Biology Ch 6 Class 11

Which of the following is true of both bacterial conjugation and meiosis?

PMC Practice 3
Biology
Kingdom Prokaryote
Elimination Tool:

A) Both processes produce four haploid cells

B) Both processes are a form of asexual reproduction

C) Both processes involve genetic recombination

D) None of these options is correct

58 / 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

59 / 100

Category: Biology

The dark reactions of photosynthesis are characterized by:

NUMS Mock 1
Biology
Bioenergetics

A) Synthesis of ATP, O2 and NADH

B) Utilization of ATP, CO2 and NADPH

C) Electron transfer from NADPH to RuBP

D) Carbon dioxide transfer from RuBP to glucose

60 / 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

61 / 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

62 / 100

Category: Biology Ch 11 Class 12

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

63 / 100

Category: Biology Ch 1 Class 12

Among the followings which is the most longest supportive cell?

Tracheids

Sclereids

Trachea

Collenchyma cells

64 / 100

Category: Biology Ch 3 Class 12

The sense organs of taste in tongue are known as:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Olfactory receptors

B) Gustatory receptors

C) Cutaneous receptors

D) All of these

65 / 100

Category: Biology Ch 5 Class 12

Germ layers are formed in which stage of development?

NUMS 2020
Biology
Growth and Development
Elimination Tool:

A) Morulation

B) Blastulation

C) Gastrulation

D) Organogenesis

66 / 100

Category: Biology Ch 3 Class 11

Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a(n):

NTS 2013
Biology
Enzymes
Elimination Tool:

A) Holoenzyme

B) Apoenzyme

C) Coenzyme

D) Zymoenzyme

67 / 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

68 / 100

Category: Biology Ch 3 Class 11

The pH at which the activity of pancreatic lipase enzyme is maximum is:

NUMS 2019 Cancelled
Biology
Enzymes
Elimination Tool:

A) 8.00

B) 9.00

C) 7.40

D) 9.20

69 / 100

Category: Biology Ch 13 Class 11

Parabronchi are open at ______ end/s

Single

Both

Do not have opening

None of these

70 / 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

71 / 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

72 / 100

Category: Biology Ch 2 Class 12

Which of the following animal has a hydrostatic skeleton:

Earthworm

Round worm

Tape worm.

Pin worm

73 / 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

74 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of Kingdom Animalia.

All animals are ingestive heterotrophs

All animals are eukaryotes

All animals develop from the dissimilar gametes i.e. large sperm and small egg.

It is largest kingdom

75 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in cockroach is

15

10

20

30

76 / 100

Category: Biology Ch 10 Class 12

Homology means

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) similiarity in characteristics resulting from common ancestors

B) similarity in function from acquired characterists

C) study of different ograns but with similar functions

D) study of similar ograns but with different functions

77 / 100

Category: Biology Ch 6 Class 12

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

NTS 2016 DUHS & JSMU
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA polymerase

B) Ligase

C) Primase

D) Endonuclease

78 / 100

Category: Biology Ch 10 Class 11

Which one of following is a true fish?

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Cuttle fish

B) Silver fish

C) Jelly fish

D) Sea fish

79 / 100

Category: Biology Ch 2 Class 11

The specific heat capacity of water is the number of calories required to raise the temperature of water from _____ ˚C is 1.0.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 15 to 16

B) 16 to 18

C) 15 to 20

D) 25 to 29

80 / 100

Category: Biology

The RNA found in Ribosomes is:

NUMS Mock 1
Biology
Chromosomes and DNA

A) mRNA

B) rRNA

C) tRNA

D) Polysome

81 / 100

Category: Biology Ch 10 Class 12

Neo-Darwinism has integrated discoveries and ideas from

Taxonomy

Paleontology

Genetics

All of these

82 / 100

Category: Biology Ch 4 Class 12

Which method is of asexual reproduction?

Sporulation

Fission

Apomixis

All of these

83 / 100

Category: Biology

Which of the following is not related to apoptosis?

NUMS Mock 1
Biology
Growth and Development

A) Loss of tail of developing humans embryos

B) Loss of tissues between developing digits

C) Controlling the number of neurons

D) None of the given options

84 / 100

Category: Biology Ch 9 Class 12

Taq polymerase is extracted from a bacterium

Floral aquaticus

Taq aquaticus

Thermus floral

Thermus aquaticus

85 / 100

Category: Biology

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

A. Menstrual cycle

B. Puberty

C. Childhood

D. Teens

86 / 100

Category: Biology Ch 7 Class 12

Which of the following sub stages does not occur in prophase I?

NTS 2015 SMBBMC
Biology
Cell Cycle
Elimination Tool:

A) Leptotene

B) Zygotene

C) Synapsis

D) Diplotene

87 / 100

Category: Biology Ch 10 Class 12

If allele frequency for a dominant allele is 0.4. What will be the number of heterogeneous individuals if the population is of 100 individuals with diploid traits.

NUMS 2015
Biology
Evolution
Elimination Tool:

A) 36

B) 48

C) 52

D) 74

88 / 100

Category: Biology Ch 7 Class 11

Golden algae are also known as

Chrysophyta

Phaeophyta

Pyrrophyta

Rhodophyta

89 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

90 / 100

Category: Biology

Lymph vessels transfer the lymph into blood through_________.

NUMS Mock 3
Biology
Transport

A) Subclavian artery

B) Subclavian vein

C) Iliac artery

D) Iliac vein

91 / 100

Category: Biology Ch 3 Class 11

Inactive enzyme precursors such as pepsinogen for pepsin are called as:

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) Holoenzymes

B) Actinases

C) Zymogens

D) Mucopolysaccharides

92 / 100

Category: Biology Ch 5 Class 11

Which of the following is not related to the enveloped virus?

PMC 2020
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) They survive for a short time

B) Their envelope is sensitive to sunlight

C) They are tolerant to antibodies

D) Envelope is derived from host

93 / 100

Category: Biology Ch 9 Class 11

The release of droplets of water from hydathodes is called:

PMC 2021 Tested
Biology
Kingdom Plantae
Elimination Tool:

A) Respiration

B) Guttation

C) Vaporization

D) Transportation

94 / 100

Category: Biology Ch 3 Class 11

A cofactor made of inorganic ion which is detachable is called

Prosthetic group

Coenzyme

Activator

Cofactor

95 / 100

Category: Biology Ch 12 Class 11

Nitrogen-fixing bacteria in root nodules fix nitrogen in soil air into:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Ammonia

B) Nitrite

C) Nitrate

D) Amino acid

96 / 100

Category: Biology

Q.33 The presence of peptidoglycan in Gram positive bacteria is

A. 40% of dry weight

B. 50% of dry weight

C. 10% of dry weight

D. 80%% of dry weight

97 / 100

Category: Biology Ch 13 Class 11

Gaseous exchange in plants takes place through the:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Stomata

B) Mesophyll

C) Endoderm

D) Xylem

98 / 100

Category: Biology Ch 14 Class 11

How many ml of blood is pumped by each contraction of the heart?

NUMS 2016
Biology
Transport
Elimination Tool:

A) 80 ml

B) 90 ml

C) 70 ml

D) 60 ml

99 / 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

100 / 100

Category: Biology Ch 6 Class 11

Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture?

Robert Koch

Louis Pasteur

Alexander Fleming

Leeuwenhoek

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