Biology Practice Test 2

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 2

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1 / 100

Category: Biology Ch 6 Class 11

Which of the following is not a component of extracellular matrix in bacteria?

NUMS 2015
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cell wall

B) Slime

C) Capsule

D) Cell membrane

2 / 100

Category: Biology Ch 3 Class 11

Enzymes _________ the activation energy of a chemical reaction

Increases

Decreases

Does not effect

Increases or decreases depending upon individual enzyme

3 / 100

Category: Biology Ch 7 Class 12

Failure of separation of sister chromatids is called:

NUMS 2020
Biology
Cell Cycle
Elimination Tool:

A) Nonfusion

B) Nondisjunction

C) Fusion

D) Interference

4 / 100

Category: Biology Ch 2 Class 11

Which one are most complex sugar:

Monosaccharides

Oligosaccharides

Polysaccharides

None of these

5 / 100

Category: Biology Ch 9 Class 11

Which of the following statement about alternation of generation in bryophytes is incorrect?

It involves alternation of morphologically different generations

Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.

Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization

pore formation occurs through meiosis

6 / 100

Category: Biology Ch 11 Class 11

Chlorophyll molecule resemble the haem group of hemoglobin, the main difference between these two molecule is that chlorophyll has ____ ion.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Fe2+

B) Mg2+

C) Mn2+

D) Ca2+

7 / 100

Category: Biology

Lecithin is formed by combining phosphatidic acid with ______:

NUMS Mock 1
Biology
Biological Molecules

A) Serine

B) Choline

C) Inositol

D) Ethanolamine

8 / 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

9 / 100

Category: Biology Ch 7 Class 11

Based on molecular data euglenoids are thought to be closely related to

Dinoflagellates

Zooflagellates

Protozoans

Algae

10 / 100

Category: Biology Ch 13 Class 11

The most important cause of many of the respiratory disorders is:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Bacterial infection

B) Pollution

C) Smoking

D) Drinking

11 / 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

12 / 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

13 / 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

14 / 100

Category: Biology Ch 8 Class 11

Ecological role of fungi as decomposers is only paralleled by

Blue green algae

Cyanobacteria

Bacteria

Virus

15 / 100

Category: Biology Ch 8 Class 11

Drug obtained from fungus used for lowing blood cholesterol is

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Lovastatin

B) Cyclosporin

C) Ergotin

D) Griseofulvin

16 / 100

Category: Biology Ch 1 Class 12

Which of the following types of transpiration account for 5 – 7 % of total transpiration that take place in plants?

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Cuticular

B) Lenticular

C) Stomatal

D) Leaves

17 / 100

Category: Biology Ch 7 Class 12

Microtubule subunits (for spindle fibers) are synthesized in _______ phase.

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) G1

B) M

C) G2

D) S

18 / 100

Category: Biology Ch 1 Class 11

A large regional community primarily determined by climate is called :

Population

Community

Biome

Habitat

19 / 100

Category: Biology Ch 12 Class 11

Percentage of magnesium by mass in a human being is:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) 0.005%

B) 0.25%

C) 0.15%

D) 0.35%

20 / 100

Category: Biology Ch 1 Class 12

In animals excess of nitrogen is excreted primarily in form of

Creatinine

Trimethyamine oxide

Pyrimidine

Ammonia

21 / 100

Category: Biology Ch 9 Class 11

Prosopis glandulosa is the botanical name of _______.

NTS 2016 SMBBMC
Biology
Kingdom Plantae
Elimination Tool:

A) Chhui mui

B) Kikar

C) Bauble

D) Devi

22 / 100

Category: Biology

Q.10 Mating between relatives is called which of the following?

A. Ex breeding

B. Breeding

C. Inbreeding

D. Outbreeding

23 / 100

Category: Biology

Many scientists believe that one of the following is evolutionary origin(s) of animals, plants and fungi?

NUMS Mock 1
Biology
Evolution

A) Protists

B) Algae

C) Bacteria

D) Protozoans

24 / 100

Category: Biology

Which processes are essential in making nitrogen from dead plant material available to growing plants?

ammonification
deamination
nitrification
nitrogen fixation
NUMS Mock 2
Biology
Man and His Enviornment

A) I, II and III only

B) I, II and IV only

C) I, III and IV only

D) II, III and IV only

25 / 100

Category: Biology

Q45 Which was the first virus to be successfully crystalized?

A. TMV

B. Smallpox

C. Poliovirus

D. Adenovirus

26 / 100

Category: Biology Ch 5 Class 12

Nutrition to egg in ovary is provided by which of the following?

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Germ cells

B) Milk cells

D) All of these

C) Follicle cells

27 / 100

Category: Biology Ch 9 Class 12

Which of the following is NOT true for genes used in recombinant DNA technology?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) It can isolated from chromosome

B) It can be synthesized chemically

C) It can be made from protein

D) It can be made from mRNA

28 / 100

Category: Biology Ch 1 Class 11

Which one is a micromolecule?

Polysaccharide

Protein

Hemoglobin

ATP

29 / 100

Category: Biology

The inhibitor which closely resembles the substrate in its molecular structure and inhibits the enzyme activity by binding to the active site of the enzyme is called:

NUMS Mock 4
Biology
Enzymes

A) Feedback inhibitor

B) Non-competitive inhibitor

C) Allosteric modulator

D) Competitive inhibitor

30 / 100

Category: Biology Ch 8 Class 11

Which of the following group represent pathological fungi?

Mushrooms morels and truffles

Rusts smuts and molds

Penicillium

All of these

31 / 100

Category: Biology

In cross-section each Centriole consist of nine (each in triplets) of:

NUMS Mock 2
Biology
Cell Structure and Function

A) Microfilaments

B) Microvilli

C) Microtubules

D) Intermediate filaments

32 / 100

Category: Biology

Egg-Laying mammals are called:

NUMS Mock 3
Biology
Reproduction

B) Protozoa

C) Chordata

D) Monotremes

E) Both A and D

33 / 100

Category: Biology

The secondary and tertiary consumers are also known as:

NUMS Mock 1
Biology
Ecosystem

B) Herbivores

C) Abiotic factors

D) Decomposers

E) Carnivores

34 / 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

35 / 100

Category: Biology Ch 8 Class 12

Which of the following is monohybrid cross

TT x tt

TTYy x Ttyy

Both of these

None of these

36 / 100

Category: Biology Ch 10 Class 11

Bipinnaria is the larval form of:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Coelenterate

B) Potychaeta

C) Echinodermata

D) Cestoda

37 / 100

Category: Biology

Q.63 Which hormone is produced mainly by corpus luteum in she ovary following ovulation?

A. Progesterone

B. FSH

C.LH

D. Chorionic gonadotrophic hormone

38 / 100

Category: Biology

The movement of plants in response to touch stimulus is called:

NUMS Mock 4
Biology
Support and Movement

A) Hydrotropism

B) Chemotropism

C) Geotropism

D) Thigmotropism

39 / 100

Category: Biology Ch 7 Class 12

Which of the following is NOT true for meiosis?

NUMS 2019 Reconduct
Biology
Cell Cycle
Elimination Tool:

A) Number of chromosomes reduced to half

B) It takes place at the time of spore formation in plants

C) It takes place at the time of growth in animals

D) Two consecutive cell divisions are involved in it

40 / 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

41 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

42 / 100

Category: Biology Ch 9 Class 11

The most successful land adapting plants are:

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Mosses

B) Ferns

C) Gymnosperms

D) Angiosperms

43 / 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.

44 / 100

Category: Biology

Q45 During birth which of following act as birth canal?

A. Oviduct

B. Ovary

C. Uterus

D. Vagina

45 / 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

46 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

47 / 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

48 / 100

Category: Biology Ch 5 Class 12

The condition due to loss of appetite for food is termed as:

NTS 2016 DUHS & JSMU
Biology
Growth and Development
Elimination Tool:

A) Anorexia nervosa

B) Bulimia nervosa

C) Colour blindness

D) Retarded growth

49 / 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

50 / 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

51 / 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

52 / 100

Category: Biology

Q43 The animals in which there are separate male and female individuals are called?

A. Unisexual

B. bisexual

C. Asexual

D. hermaphrodite

53 / 100

Category: Biology Ch 11 Class 11

Estimating relative CO2 consumption or O2 release during photosynthesis at different wavelengths of light, is termed as:

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Action spectrum

B) Absorption spectrum

C) Dark reaction

D) Light reaction

54 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not found in series proterostomia.

Annelida

Arthropoda

Mollusea

Echinodermata

55 / 100

Category: Biology Ch 7 Class 11

Which of the following is used as a biological weapon?

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Radiation

B) All of these

C) Chemicals

D) Virus

56 / 100

Category: Biology Ch 8 Class 12

If a heterozygous individual shows the complete effect of both alleles, the type of inheritance would be

Complete dominance

Non dominance

Incomplete dominance

Co-Dominance

57 / 100

Category: Biology Ch 4 Class 11

Etioplasts found in plants are actually one of the types of:

NUMS 2015
Biology
Cell Structure and Function
Elimination Tool:

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) None of the given options

58 / 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

59 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in cockroach is

15

10

20

30

60 / 100

Category: Biology

Which of the following, which is the incorrectly paired one?

NUMS Mock 2
Biology
Biology and its Major Fields of Specialization

B) Schlelden and schwann … cell theory

C) Robert Brown… nucleus

D) Watson and Crick … DNA model

E) Virchow… mosaic model of plasma membrane

61 / 100

Category: Biology Ch 6 Class 12

Rate of DNA replication by DNA polymerase is

2000 nucleotides / sec

1000 nucleotides / sec

150 nucleotides / sec

1050 nucleotides / sec

62 / 100

Category: Biology Ch 3 Class 11

The Induced fit model was introduced by Koshland in which of the following year?

PMC Sample 1
Biology
Enzymes
Elimination Tool:

A) 1960

B) 1961

C) 1959

D) 1966

63 / 100

Category: Biology Ch 10 Class 11

The adaptive feature(s) which help(s) the fish to live in water include(s):

NTS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) A tail and an air bladder

B) Unpaired and paired fins

C) Streamlined body

E) All of these options

64 / 100

Category: Biology

The ability of an individual to pass on its phenotype to future generations is known as:

NUMS Mock 1
Biology
Variation and Genetics

A) Fitness

B) Heritability

C) Limited environmental resources

D) Overproduction of offspring

65 / 100

Category: Biology

Q.33 Food in plants is transported in the form of:

A. Monosaccharide

B. Polysaccharide

C. Disaccharide

D. Oligosaccharide

66 / 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

67 / 100

Category: Biology Ch 11 Class 11

Pyruvic acid is the end product of:

NTS 2017
Biology
Bioenergetics
Elimination Tool:

A) Glycolysis

B) Krebs cycle

C) Oxidation

D) Electron transport system

68 / 100

Category: Biology Ch 2 Class 11

Ribose sugar that is the main part of RNA is a type of _____ sugar.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) Triose

B) Tetrose

C) Pentose

D) Hexose

69 / 100

Category: Biology Ch 3 Class 11

A student of chemical engineering mistakenly engulfed the toxic compound “A” which was a potent inhibitor of a certain enzyme. He was immediately brought to a hospital where the doctor injected, intravenously, substrate “B” to minimize the toxic effect of Compound A. His life was saved from serious damage. The treatment method shows that compound A was a ______ inhibitor.

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Non competitive

B) Irreversible

C) Temperature sensitive

D) Competitive reversible

70 / 100

Category: Biology Ch 6 Class 12

Genetic information in the DNA is encoded as:

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Deoxyribose sugar

B) Ribose sugar

C) Phosphate group

D) Sequence of nitrogenous bases

71 / 100

Category: Biology Ch 13 Class 11

The blood enters the _____ side of heart

Posterior

All possibl

72 / 100

Category: Biology Ch 2 Class 11

Which of the following processes is the reverse of condensation?

NTS 2016 SMBBMC
Biology
Biological Molecules
Elimination Tool:

A) Hydrolysis

B) Dehydration synthesis

C) Polymerization

D) Vapourization

73 / 100

Category: Biology Ch 3 Class 12

Hepatic and Pancreatic secretions are also stimulated by a hormone called:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Gastrin

B) Secretin

C) Insulin

D) Glucagon

74 / 100

Category: Biology Ch 14 Class 11

Highest blood pressure is found in:

NUMS 2015
Biology
Transport
Elimination Tool:

A) Arteries

B) Veins

D) None of the given options

C) Capillaries

75 / 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

76 / 100

Category: Biology

Q.68 The spinal cord consist of which type of cell bodies?

A. Sensory neuron

B. motor neuron

C. connector neuron

D. all of these

77 / 100

Category: Biology Ch 10 Class 12

Adaptations that an organism acquires by its own actions are

Heritable

Not heritable

Can be made heritable through some modifications

Both heritable and not heritable

78 / 100

Category: Biology Ch 8 Class 11

Antibiotics are produced by fungi and certain bacteria of group:

UHS 2013
Biology
Kingdom Fungi
Elimination Tool:

A) Actinomycetes

B) Oomycetes

C) Ascomycetes

D) Basidiomycetes

79 / 100

Category: Biology Ch 7 Class 12

Reverse of prophase is

Interphase

Metaphase

Anaphase

Telophase

80 / 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

81 / 100

Category: Biology Ch 9 Class 12

Gel electrophoresis is a technique:

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Employed by forensic scientist to assist in the identification of the individuals by their respective type of DNA

B) Collect all the genes found in one complete set of chromosome

C) Is a technique to separate different sizeds fragment of charge bearing polymers (proteins, RNA or DNA)

D) Grows single cell or a group of cells in a glass ware on artificial medium under aseptic conditions

82 / 100

Category: Biology Ch 2 Class 12

Joints found at the vertebrates are:

NTS 2014
Biology
Support and Movement
Elimination Tool:

A) gliding joints

C) partially moveable joints

B) sliding joints

D) fixed joints

83 / 100

Category: Biology Ch 6 Class 12

The true E.Coli replicating enzyme is

DNA polymerase I

DNA polymerase II

DNA polymerase III

All of these

84 / 100

Category: Biology Ch 11 Class 11

In electron transport chain, ATP synthesis takes place when electrons move from:

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) Primary Electron Acceptor (PEA) to Plastoquinone (Pq)

B) Plastoquinone (Pq) to cytochromes

C) Cytochrome to Plastocyanin (Pc)

D) Plastocyanin (Pc) to Photosystem I (PS I)

85 / 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

86 / 100

Category: Biology

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

NUMS Mock 2
Biology
Biotechnology

A) Gel electrophoresis

B) Polymerase chain reaction

C) DNA extraction

D) Recombination

87 / 100

Category: Biology Ch 5 Class 11

The size of poxvirus is:

20 nm

200 nm

250 nm

300 nm

88 / 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

89 / 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

90 / 100

Category: Biology Ch 3 Class 12

In plants, ______ hormone promotes closing of stomata in drought conditions.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Ethene

B) Gibberellins

C) Cytokinins

D) Abscisic acid

91 / 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

92 / 100

Category: Biology Ch 13 Class 11

Smaller the animals:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) More rate of respiration

B) Less the rate of respiration

C) Rate of respiration has nothing to do with the size of animal

D) None of these

93 / 100

Category: Biology Ch 5 Class 11

The shape of the tobacco mosaic virus is:

NUMS 2016
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Spring shape

B) Rod shape

C) Comma shape

D) Spherical shape

94 / 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

95 / 100

Category: Biology

Which one of the following is most likely to occur in a boy during puberty?

NUMS Mock 4
Biology
Reproduction

A) He produces eggs

B) His shoulders broaden

C) The colour of his eyes change

D) None of these options is correct

96 / 100

Category: Biology

Q.21 All of the following are true for platyhelminthes except:

A. Flatworms

B. Triploblastic

C. Coelomates

D. Bilateral symmetry

97 / 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.

98 / 100

Category: Biology

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

A. Leaf

B.Stems

C. Roots

D. Branches

99 / 100

Category: Biology Ch 9 Class 12

Bacterial cells take up recombinant plasmids when they are treated with:

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) CaCl2

B) NaCl

C) KCl

D) NaOH

100 / 100

Category: Biology Ch 4 Class 11

Percentage of proteins in cell membrane is

20-40%

40-50%

60-80%

80-100%

Your score is

The average score is 57%

0%

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