Biology Practice Test 5

Created by Ali Durrani

MDCAT Practice Tests

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1 / 100

Category: Biology Ch 6 Class 11

Who coined the term Animalcules for microorganisms like Bacteria and protozoa?

Robert Koch

Louis Pasteur

Alexander Fleming

Leeuwenhoek

2 / 100

Category: Biology Ch 13 Class 12

In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

NTS 2019
Biology
Man and His Environment
Elimination Tool:

A) Intraspecific competition.

B) Interspecific competition

C) Environmental competition

D) All of the above

3 / 100

Category: Biology

Pseudopodia are:

NUMS Mock 1
Biology
Support and Movement

A) False feet developed in some unicellular organisms

B) Small hairlike structures present on the unicellular organisms

C) Long, tube like structures coming out of the mouth

D) Suckers which are attached to the walls of intestines

4 / 100

Category: Biology Ch 9 Class 12

Lambda phage is

Virus

Bacterium

Plasmid

Host cell

5 / 100

Category: Biology

Q.46 Which part of the brain connects the cerebrum with the spinal cord?

A. Forebrain

B. Cerebrum

C. Cerebellum

D. Brainstem

6 / 100

Category: Biology

Q.53____________________are among smallest known virus

A. Picornavirus

B. Parvoviruses

C. Herpes virus

D. Rotavirus

7 / 100

Category: Biology Ch 4 Class 11

Pancreas produces secretory granules that help in digestion. These granules after passing through endoplasmic reticulum are pinched off from ______ surface of Golgi apparatus:

Forming face

Maturating face

Any of them

None of these

8 / 100

Category: Biology Ch 5 Class 12

he only promoter of Leaf’s senescence in the following plant hormones is:

PMC Practice 9
Biology
Coordination and Control
Growth and Development
Elimination Tool:

A) Gibberellins

B) Cytokinins

C) Auxins

D) Abscisic acid

9 / 100

Category: Biology

Now-a-days every newborn gets regular shots of vaccine for polio. It contains _________ for polio to make a child immune against this disease.

NUMS Mock 4
Biology
Bio-diversity | Variety of Life

A) Antibiotics

B) Antibodies

C) Antigens

D) Antisera

10 / 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

11 / 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

12 / 100

Category: Biology Ch 6 Class 11

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch?

A specific organism can always be found in association with a given disease

The organism can be isolated and grown in pure culture in the laboratories

The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

It is possible to recover the organism in pure culture from the experimentally infected animals.

13 / 100

Category: Biology Ch 3 Class 11

Enzymes work by lowering the ______ of the reactions they catalyse:

PMC 2020
Biology
Enzymes
Elimination Tool:

A) Kinetic energy

B) Activation energy

C) Heat energy

D) Potential energy

14 / 100

Category: Biology Ch 2 Class 11

Specific heat of vaporization of water is:

574 Kcal/kg

674 Kcal/kg

774 Kcal/kg

874 Kcal/kg

15 / 100

Category: Biology Ch 3 Class 11

Cyanide for enzymes act as:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Substrate

C) Cofactor

B) Prosthetic group

D) Inhibitor

16 / 100

Category: Biology Ch 4 Class 11

60S and 40S subunit combine to form ______ particle

100 S

90 S

80 S

70 S

17 / 100

Category: Biology Ch 4 Class 11

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called

Active transport

Passive transport

Co-transport

Counter transport

18 / 100

Category: Biology Ch 10 Class 12

Which of the following is a vestigial organ?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Teeth

B) Nails

C) Body hair

D) Ears

19 / 100

Category: Biology Ch 6 Class 12

What is the effect of enzyme DNA ligase?

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA is broken up at specific sites

B) DNA fragments are joined together

C) DNA replication occurs

D) DNA transcription occurs

20 / 100

Category: Biology Ch 6 Class 12

What will be the approximate length of a DNA strand having 500 nucleotides?

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

HIDE ELIMINATED OPTIONS

A) 100 nm

B) 130 nm

C) 170 nm

D) 150 nm

21 / 100

Category: Biology Ch 8 Class 12

If we cross round (RR) seeded plants with wrinkled (rr) seed plant, and get F1 round seeded. In F2 generation, what will be genotypic ration of plants try Punnett square method?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

B) 1:1

C) 2:1

D) 1:1:2

E) 1:2:1

22 / 100

Category: Biology

What do we call the cell surface membrane of a muscle fibre?

NUMS Mock 3
Biology
Support and Movement

A) Sarcolemma

B) Plasma membrane

C) Sarcoplasm

D) Myofibrils

23 / 100

Category: Biology Ch 2 Class 12

In presence of muscle contraction, ______ is brought closer, _____ shortens and ______ disappears.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Z – line, H – zone, I – band

B) I – band, Z – line, H – zone

C) Z – line, I – band, H – zone

D) H – zone, I – band, Z – line

24 / 100

Category: Biology Ch 10 Class 12

This theory says that “mitochondria and chloroplasts are, in effect, ancient bacteria which now live inside the larger cells”:

PMC 2020
Biology
Evolution
Elimination Tool:

A) Darwin’s theory of evolution

B) Lamarckism

C) Neo – darwinism

D) Endosymbiont theory

25 / 100

Category: Biology

Why cannot viruses replicate on their own?

NUMS Mock 2
Biology
Variety of Life

A) They are too small.

B) They have no cell wall.

C) They lack metabolic machinery.

D) All of theoptions are correct.

26 / 100

Category: Biology

Given figures shows:

NUMS Mock 4
Biology
Gaseous Exchange

A) Structure of Lenticel

B) Hydathode showing gaseous vapour exchange

C) Fungus reproducing by spore formation

D) Algae reproducing by spore formation

27 / 100

Category: Biology Ch 9 Class 11

What is an example of sperms of liverworts, mosses, ferns which move towards archegonia, in response to nucleic acid released by the ovum?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Chemotropic movement

B) Chemonastic movement

C) Haptonastic movement

D) Chemotactic movement

28 / 100

Category: Biology

The smaller (40S) of ribosome combines with larger subunit (60S) in the presence of Mg2+ ion to form _____ particle.

NUMS Mock 3
Biology
Cell Structure and Function

A) 100 S

B) 90 S

C) 80 S

D) 70 S

29 / 100

Category: Biology Ch 4 Class 12

Which statement is incorrect?

In short day plants red light prevents flowering

Henbane is a short day plant

In long day plants for red light promotes flowering

Leaf unrolling occurs in grasses

30 / 100

Category: Biology Ch 1 Class 12

As an excretory organ, liver:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Detoxifies many chemical poisons

B) Produces ammonia for excretion by the kidneys

C) Produces urea and uric acids from the nitrogen of amino acids

D) All of the above

31 / 100

Category: Biology Ch 9 Class 12

Which statement is not true about PCR?

Developed by Kary Mullis

Take its name from DNA polymerase

Is not very specific

Taq polymerase is used

32 / 100

Category: Biology Ch 11 Class 11

Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on

Bacteria

Algae

Protenema

Cyanobacteria

33 / 100

Category: Biology Ch 4 Class 11

Whone is not the function of endoplasmic reticulum?

Nerve impulse conduction

Transport of material

Mechanical support

Synthesis of conjugated molecules

34 / 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

35 / 100

Category: Biology Ch 6 Class 12

Locus is defined as:

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Position of a gene on the chromosome

B) Appearance of a trait in an individual

C) Partner of a gene pair

D) Gene in an individual for a trait

36 / 100

Category: Biology

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the haemoglobin molecule?

NUMS Mock 4
Biology
Biological Molecules

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quatenary Structure

37 / 100

Category: Biology

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

A. Estrogen

B. FSH

C. Testosterone

D. Progesterone

38 / 100

Category: Biology

Q.68 Enzymes are globular proteins because

A. They have a primary structure.

B. They have a secondary structure.

C They have a tertiary structure,

D. All of the above.

39 / 100

Category: Biology Ch 14 Class 11

The only vein in the human body carrying oxygenated blood is:

NUMS 2020
Biology
Transport
Elimination Tool:

A) Femoral

B) Pulmonary

C) Renal

D) Iliac

40 / 100

Category: Biology Ch 4 Class 11

In a typical compound microscope the resolution is 2 μm. Which is about _____ that of naked eye.

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) 100 x

B) 300 x

C) 400 x

D) 500 x

41 / 100

Category: Biology

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?

NUMS Mock 4
Biology
Variation and Genetics

A) 25%

B) 50%

C) 75%

D) 100%

42 / 100

Category: Biology Ch 8 Class 12

In the pea plants, the factors round and yellow seeds (RRYY) is dominant over wrinkled and green seeds (rryy). Keeping this in mind, identify the seed that has the genotype round and green.

NTS 2011
Biology
Variation and Genetics
Elimination Tool:

A) Rryy

B) rrYy

C) RrYy

D) RRYy

43 / 100

Category: Biology Ch 11 Class 11

First stable compound during Calvin cycle is:

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) 3-phosphoglycerate

B) Glyceraldehyde 3 – phosphate

C) 1, 3 bisphosphoglycerate

D) Ribulose bisphosphate

44 / 100

Category: Biology Ch 8 Class 11

How many species of fungi are known till now

10000

100000

10000000

1000

45 / 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

46 / 100

Category: Biology

DNA fingerprinting is basically done for:

NUMS Mock 1
Biology
Biotechnology

A) DNA cloning

B) DNA analysis

C) DNA sequencing

D) DNA splicing

47 / 100

Category: Biology Ch 7 Class 11

Lime stone deposits are formed from

Zooflagellates

Foraminferans

Aetinopods

Apicomplexans

48 / 100

Category: Biology

Q.36 The ETC in plants consists of an electron carrier called?

A. Pq

B. Pc

C. Pt

D.Po

49 / 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

50 / 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?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) community

B) family

C) race

D) population

51 / 100

Category: Biology

Optimum pH for action of pepsin and salivary amylase is

NUMS Mock 2
Biology
Nutrition

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

52 / 100

Category: Biology Ch 12 Class 11

Digestive system in vertebrates is formed by which germ layer?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Ectoderm

B) Endoderm

C) Mesoderm

D) None of these

53 / 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

54 / 100

Category: Biology

Q.53 Which of these is the best treatment for osteoarthritis?

A. Bed rest

B. Exercise

C. Cast

D. None of these

55 / 100

Category: Biology Ch 12 Class 11

Puccinia commonly destroys

Corn

Tomato

Dodder

Wheat

56 / 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

57 / 100

Category: Biology Ch 9 Class 12

The technique use of identification of criminals is called:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Cloning

B) DNA fingerprinting

C) Restriction Analysis

D) Polymorphism

58 / 100

Category: Biology Ch 12 Class 11

Which of the following is not the type of cells of gastric gland?

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Zymogenic

C) Sinusoidal

B) Parietal

D) Mucous neck

59 / 100

Category: Biology

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

NUMS Mock 3
Biology
Transport

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

60 / 100

Category: Biology Ch 13 Class 11

During inspiration, the space inside the chest cavity is increased due to:

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) The relaxation of the muscles of the diaphragm

B) Relaxation of the external intercostal muscles

D) The contraction of the muscles of the diaphragm

C) Increased pressure

61 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

62 / 100

Category: Biology Ch 5 Class 11

Solanum tuberosum is a scientific name of:

Onion

Amaltas

Potato

Tomato

63 / 100

Category: Biology Ch 9 Class 11

The term which is not related to the process of evolution of leaf is:

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Overtopping

B) Planation

C) Heterospory

D) Fusion / webbing

64 / 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

65 / 100

Category: Biology Ch 8 Class 12

Which of the following condition is hybrid A. TT B. Tt C. tt D. All of these

TT

Tt

tt

All of these

66 / 100

Category: Biology Ch 4 Class 12

Menstrual cycle can be divided into:

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Single phase

B) Two phases

C) Three phases

D) Four phases

67 / 100

Category: Biology Ch 13 Class 11

The gas-exchange portion of the human respiratory system is the:

NTS 2016 SMBBMC
Biology
Gaseous Exchange
Elimination Tool:

A) Larynx

B) Trachea

C) Bronchi

D) Alveoli

68 / 100

Category: Biology

Q.36 The retinal is important for___________ of human

A. Vision

B. Metabolism

C. Muscle contraction

D. Muscle twitch

69 / 100

Category: Biology Ch 8 Class 12

What CANNOT be true for a man having B+ve blood group?

NUMS 2019 Reconduct
Biology
Variation and Genetics
Elimination Tool:

A) His mother’s blood group is BB

B) His mother’s blood group is BO

C) His father’s blood group is AO

D) His father’s blood group is AA

70 / 100

Category: Biology

What is the effect of enzyme DNA ligase?

NUMS Mock 2
Biology
Chromosomes and DNA

A) DNA is broken up at specific sites

B) DNA fragments are joined together

C) DNA replication occurs

D) DNA transcription occurs

71 / 100

Category: Biology Ch 11 Class 11

The light dependent reaction of photosynthesis occurs in:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Stroma of chloroplast

B) Guard cells of stomata

C) Thylakoid membrane of chloroplast

D) Cytoplasm of leaf cell

72 / 100

Category: Biology Ch 9 Class 12

The enzyme which seals the foreign DNA into the vector is

Restriction endonuclease

DNA polymerase

DNA ligase

DNA mutase

73 / 100

Category: Biology Ch 1 Class 11

An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called:

Biome

Phyletic lineage

Community

Population

74 / 100

Category: Biology Ch 13 Class 12

An area previously supporting life is made barren, the subsequent recolonization is called ______.

UHS 2018
Biology
Man and His Environment
Elimination Tool:

A) Climax community

B) Pioneer succession

C) Primary succession

D) Secondary succession

75 / 100

Category: Biology

Q.47 Which of the following are believed to have common origin with annelids?

A. Nematodes

B. Arthropods

C. Molluses

D. None of these

76 / 100

Category: Biology Ch 11 Class 12

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

77 / 100

Category: Biology Ch 4 Class 12

In asexual reproduction offspring are produced by which of the following?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) meiosis

B) mitosis

C) both a and b

D) none of these

78 / 100

Category: Biology

Which of the following is not a vestigial organ of man?

NUMS Mock 1
Biology
Evolution

A) Appendix

B) Coccyx

C) Both Options A and B are correct

D) None of these options is correct

79 / 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

80 / 100

Category: Biology Ch 6 Class 11

Tuberculosis is caused by?

NTS 2015 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

A) Bacterium

B) Allergy

C) Nicotine

D) Virus

81 / 100

Category: Biology Ch 2 Class 11

All of the following structures are proteinous in nature except:

NUMS 2014
Biology
Biological Molecules
Elimination Tool:

A) Hooves

B) Haemoglobin

C) Enzymes

D) Steroids

82 / 100

Category: Biology Ch 6 Class 12

In a typical nucleotide, the nitrogenous base is attached to _______ carbon of pentose sugar.

NTS 2010
Biology
Chromosomes and DNA
Elimination Tool:

B) 5th

C) 4th

D) 3rd

E) 1st

83 / 100

Category: Biology Ch 7 Class 11

Which of the following statements is correct?

NUMS 2017
Biology
Kingdom Protista
Elimination Tool:

A) Viruses have their own ribosomes for protein formation

B) New viral ribosomes are formed after viral DNA enters the cell

C) Viruses do not need ribosomes for protein formation

D) Viruses use the host ribosomes for their own requirements

84 / 100

Category: Biology Ch 12 Class 11

Bile is used in:

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Protein digestion

B) Starch digestion

C) Fat emulsification

D) Both A and B

85 / 100

Category: Biology Ch 14 Class 11

Identify the only cells in leaf epidermis, which are NOT connected to other cells by plasmodesmata and are involved in photosynthesis.

NUMS 2019 Reconduct
Biology
Transport
Elimination Tool:

A) Epidermal cells

B) Spongy mesophyll cells

C) Guard cells

D) Palisade mesophyll cells

86 / 100

Category: Biology Ch 2 Class 11

A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called:

Lipid

Carbohydrate

Protein

Carotein

87 / 100

Category: Biology Ch 3 Class 12

Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

None of these.

88 / 100

Category: Biology Ch 6 Class 12

DNA contains

Purines (A and G) pyrimidines (U and (c)

Purines (T and (c) pyrimidines (A and G)

Purines (A and (c) pyrimidines (U and G)

Purines (A and G) pyrimidines (T and (c)

89 / 100

Category: Biology Ch 10 Class 11

The system well – developed in the acoelomate is

Excretory system

Nervous system

Both of these

Transport system

90 / 100

Category: Biology Ch 10 Class 12

Whose theory of natural selection is essentially identical to Darwin’s theory?

NUMS 2019 Cancelled
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Alfred Wallace

C) Lyell

D) Mathus

91 / 100

Category: Biology

Q.17 A structural component that is found in all viruses is?

A. envelope

B. DNA

C. Capsid

D. Tail Fibers

92 / 100

Category: Biology Ch 2 Class 11

Reactive parts of an amino acid are:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Alpha carbon & amino group

C) Carboxyl & R group

B) Amino group & carboxyl group

D) R group & alpha carbon

93 / 100

Category: Biology Ch 4 Class 12

During birth, central nervous system of infants can be damaged by

PMC Sample 3
Biology
Reproduction
Elimination Tool:

A) syphilis

B) genital herpes

C) gonorrhoa

D) HPV

94 / 100

Category: Biology Ch 3 Class 11

The type of energy, reduced by the enzymes, for biological reactions to occur is called the:

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Light Energy

B) Heat energy

C) Active energy

D) Activation energy

95 / 100

Category: Biology Ch 3 Class 11

An activated enzyme consisting of polypeptide chain and a cofactor is called:

Apoenzyme

Holoenzyme

Activated enzyme

Both b and c

96 / 100

Category: Biology

Identify the incorrect statement about Charles Darwin’s theory:

NUMS Mock 1
Biology
Evoloution

B) There is always a tendency of over reproduction in a species.

C) Vast gradual changes result in the origin of a new species.

D) Favorable variations survive and unfavorable will be exterminated.

E) Intra-specific competition occurs between different species and interspecific competition occurs among the individuals in a species.

97 / 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

98 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in cockroach is

15

10

20

30

99 / 100

Category: Biology Ch 2 Class 12

Growth movement caused in response to gravitational stimulus is called:

NTS 2011
Biology
Support and Movement
Elimination Tool:

A) Nutation

B) Geotropism

C) Nastic movement

D) Tropic movement

100 / 100

Category: Biology Ch 3 Class 11

When inhibitor binds to enzyme other than active site and alters its structure, then it is called:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Competitive inhibitor

B) Non-competitive inhibitor

C) Reversible inhibitor

D) Irreversible inhibitor

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