Biology Practice Test 2

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 2

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1 / 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

2 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

2

3

5

4

3 / 100

Category: Biology Ch 7 Class 11

Who first separated bacteria from other protists as a group?

John Hogg

Ernst Haeckel

Margulis and Schwartz

Herbert Copeland

4 / 100

Category: Biology Ch 10 Class 12

In humans gill pouches have modified into

Nose

Ear

Eustachian tubes

External ear

5 / 100

Category: Biology Ch 1 Class 11

Which character differentiates living things from non-living organisms?

They live in the same ecosystem.

They are acted upon by the same environment

They are highly organized and complex made of one or more cells and contain genetic material

Both a and b

6 / 100

Category: Biology Ch 4 Class 12

Which method is of asexual reproduction?

Sporulation

Fission

Apomixis

All of these

7 / 100

Category: Biology Ch 5 Class 11

Which of the Euglenas (a Protoctista) character resembles that of animals:

They can move

They lack cell wall

They do not have chlorophyll

Both a and b

8 / 100

Category: Biology Ch 12 Class 11

Digestion of which food components starts from the oral cavity?

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Proteins

B) Fats

D) Vitamins

C) Carbohydrates

9 / 100

Category: Biology Ch 2 Class 12

The multinucleated mass of the bone-breaking cells is called:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Osteoclasts

B) Osteoblasts

C) Osteogenesis

D) Osteocytes

10 / 100

Category: Biology

Which one of the following muscles are considered as “Voluntary muscles”?

NUMS Mock 1
Biology
Support and Movement

A) Smooth muscles

B) Cardiac muscles

C) Skeletal muscles

D) Glandular muscles

11 / 100

Category: Biology Ch 10 Class 11

Which vertebrate groups have scaly skin?

NTS 2013
Biology
Kingdom Animalia
Elimination Tool:

A) amphibians and fish

B) amphibians and mammals

C) fish and mammals

D) fish and reptiles

12 / 100

Category: Biology Ch 6 Class 11

For respiratory metabolism, a bacterial cell membrane contains:

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Proteins

B) Lipids

D) Chemicals

C) Enzymes

13 / 100

Category: Biology Ch 13 Class 12

Tides are caused by

Gravitational pull of sun

Movements of large animals in water

Uneven water body floor

High winds

14 / 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

15 / 100

Category: Biology Ch 5 Class 12

Developing seeds are rich source of

Auxins

Gibberellins

Cytokinins

All of these

16 / 100

Category: Biology Ch 1 Class 12

The major portion of (NH)2CO is secreted by:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Sweat

B) Saliva

C) Urine

D) Stool

17 / 100

Category: Biology Ch 10 Class 12

Carolus Linnaeus was believer of

Special creation

Natural selection

Catastrophism

. Inheritance of acquired characters

18 / 100

Category: Biology Ch 14 Class 11

The causes of Cyanosis include:

NTS 2010
Biology
Transport
Elimination Tool:

A) Deficiency of vitamin C

B) Varicella-zoster virus

C) Degeneration of the cartilage of joints

D) Ventricular septum defect

19 / 100

Category: Biology

Q.1 At which times there is no net gaseous exchange between leaves and the atmosphere?

A. Day

B. Night

C. Dawn and Dusk

D. Midnight

20 / 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

21 / 100

Category: Biology Ch 10 Class 11

Which group of organisms has the following features?

I. three pairs of jointed legs

II. three-part segmented body

III. one pair of antennae

NTS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) arachnids

B) crustaceans

C) Insects

D) myriapods

22 / 100

Category: Biology

Q.25 Which of the following is an example of a marine annelid?

A. Neries

B. Stylaria

C. Earthworm

D. Leech

23 / 100

Category: Biology Ch 7 Class 12

The phase of mitosis in which sister chromatids move towards opposite poles:

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) Anaphase

B) Metaphase

C) Prophase

D) Telophase

24 / 100

Category: Biology Ch 1 Class 12

Which hormone prepares the body for situations of stress and emergency?

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Adrenaline

B) Non adrenaline

C) Thyroxin

D) Insulin

25 / 100

Category: Biology Ch 1 Class 12

In a marine environment, the ion secreted by the kidney is:

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Na+

B) K+

C) Mg2+

D) Cl-

26 / 100

Category: Biology Ch 1 Class 12

Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of:

Chemotropic movement

Chemotactic movement.

Chemosastic movement

. Haptonastic movement.

27 / 100

Category: Biology Ch 11 Class 11

In the Calvin cycle, the reducing power from NADPH is used during:

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Formation of 1, 3- Bisphosphoglycerate

B) Conversion of 1, 3- Bisphosphoglycerate to Glyceraldehyde 3- phosphate

C) Formation of fructose 1, 6- bisphosphate from 1, 3- bisphosphoglycerate

D) Formation of glucose from fructose bisphosphate

28 / 100

Category: Biology Ch 14 Class 11

In human heart, the left atrium receives:

PMC 2020
Biology
Transport
Elimination Tool:

A) The superior vena cava

B) The inferior vena cava

C) The coronary sinus

D) The four pulmonary veins

29 / 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

30 / 100

Category: Biology

Which vertebrae together are called pelvic vertebrae?

NUMS Mock 2
Biology
Support and Movement

A) Coccygeal and lumbar

B) Sacral and lumbar

C) Sacral and coccygeal

D) Sacral and thoracic

31 / 100

Category: Biology Ch 6 Class 11

Cell wall is only absent in the following group of bacteria;

PMC Practice 6
Biology
Kingdom Prokaryote
Elimination Tool:

A) Staphylococci

B) Pseudomunas

C) Diplococcus pneumonia

D) Mycoplasmas

32 / 100

Category: Biology Ch 3 Class 11

If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because:

There is probably more substrate present than there is enzyme.

There is probably more enzayme available than there is substrate.

There is probably more product present than there is either substrate or enzyme.

The enzyme substrate complex is probably failing to form during the reaction.

33 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

34 / 100

Category: Biology Ch 9 Class 11

Red algae do not contribute towards:

PMC 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Making coral reefs

B) Forming limestone deposits

C) Making fertilizers

D) Forming chalk deposits

35 / 100

Category: Biology Ch 10 Class 11

The system well – developed in the acoelomate is

Excretory system

Nervous system

Both of these

Transport system

36 / 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

37 / 100

Category: Biology

Q.41 The stretch reflex is also known as:

A. Stretch reflex

B. Spinal reflex

C. Golgi tendon reflex

D. Myotatic reflex

38 / 100

Category: Biology Ch 12 Class 11

Parasites capable of living independently of its host at times is called as _______ parasite.

Obligate

Strict

Facultative

Endoparasite

39 / 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%

40 / 100

Category: Biology Ch 7 Class 12

Diplotene is the sub-stage of:

NTS 2011
Biology
Cell Cycle
Elimination Tool:

A) Anaphase

B) Telephase I

C) Prophase I

D) Metaphase

41 / 100

Category: Biology Ch 3 Class 12

Diameter of an artery can be changed by:

NUMS 2015
Biology
Coordination and Control
Elimination Tool:

A) Nervous stimulation

B) Chemical stimulation

C) Both chemical and nervous stimulation

D) None of the given options

42 / 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

43 / 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

44 / 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

45 / 100

Category: Biology Ch 12 Class 11

In human gut, chylomicrons are formed by the combination of:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

46 / 100

Category: Biology Ch 7 Class 11

Trypanosoma is a human parasite causing

UHS 2010
Biology
Kingdom Protista
Elimination Tool:

A) African sleeping sickness

B) European sleeping sickness

C) Indonesian sleeping sickness

D) American sleeping sickness

47 / 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

48 / 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

49 / 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

50 / 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

51 / 100

Category: Biology Ch 6 Class 12

Haploid and monoploid numbers of chromosomes of hexaploid wheat are:

NTS 2014
Biology
Chromosomes and DNA
Elimination Tool:

A) 21 and 42

B) 7 and 21

C) 21 and 7

D) 42 and 21

52 / 100

Category: Biology Ch 8 Class 12

Which of the following characters of pea plant is dominant?

Axial flowers

Yellow pods

White flowers

Wrinkled seeds

53 / 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%

54 / 100

Category: Biology Ch 3 Class 11

Extreme change in pH results in:

Change in ionization of amino acids at the active site of the enzyme.

Change in the ionization of the substrate.

Denaturation of the enzyme

IncreaseIncrease in the reaction rate. in the reaction rate.

55 / 100

Category: Biology

Q.47 The chemical nature of oxytocin is:

A. Protein

B. Amino acid derivative

C. Polypeptide

D. Steroid Incorrect

56 / 100

Category: Biology Ch 9 Class 11

Which of the following statement about plants is incorrect?

All are eukaryotes

They are multicellular.

Non-motile organisms

Are heterotrophes

57 / 100

Category: Biology Ch 8 Class 11

Fungi can tolerate pH from

3?7

2?6

2?9

. 3?6

58 / 100

Category: Biology Ch 9 Class 11

Which of the following is not a parasitic fungus of plants?

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Rust

B) Mildews

C) Armillaria

D) None of the given options

59 / 100

Category: Biology Ch 6 Class 11

A Dutch scientist firstly observed very small creatures in

PMC Practice 6
Biology
Kingdom Prokaryote
Elimination Tool:

A) Vinegar

B) Saliva

C) Rain water

D) All of Above

60 / 100

Category: Biology

Lamarck is best known for his theory of:

NUMS Mock 3
Biology
Evolution

A) Inheritance

B) Dominance

C) Inheritance of acquired characteristics

D) All of the above

61 / 100

Category: Biology Ch 6 Class 11

If lipopolysaccharides did not appear in the wall of bacteria on staining then it will be known as ________.

UHS 2018
Biology
Kingdom Prokaryote
Elimination Tool:

A) Gram negative

B) Gram positive

C) Capsule

D) Both Gram positive & negative

62 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria possesses a spherical shape?

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Bacillus anthracis

B) Escherichia coli

C) Spirillum minus

D) Staphylococcus aureus

63 / 100

Category: Biology Ch 13 Class 11

Lungs are separated from abdominal cavity by a muscular sheath called:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Rib cage

C) Pericardium

D) Diaphragm

64 / 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

65 / 100

Category: Biology Ch 4 Class 12

In the male reproductive tract, sperm cells follow a specific path. Which of the following do sperm cells enter after traveling through the epididymis?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) Urethra

B) Seminiferous tubules

C) Ejaculatory duct

D) Vas deferens

66 / 100

Category: Biology Ch 9 Class 12

A technique in transgenic animals in which desired gene is inserted into the eggs of animal is called:

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) Embryonic Stem Cell mediated Transfer

B) Microinjection

C) Retro-virus mediated gene Transfer

D) Virus vectors

67 / 100

Category: Biology Ch 8 Class 12

If we cross round yellow seeded plant with green wrinkled seeded plants, what will be phenotypic ratio at F2 generation?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) 9:3:3:1

B) 9:4:3:2

C) 3:9:3:1

D) 8:3:3:2

68 / 100

Category: Biology Ch 4 Class 11

Anthocyanins are various types of colorful pigments present in the:

NUMS 2014
Biology
Cell Structure and Function
Elimination Tool:

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) Vacuoles

69 / 100

Category: Biology Ch 10 Class 11

Species of phylum Platyhelminthes are:

NTS 2011
Biology
Kingdom Animalia
Elimination Tool:

A) Roundworms

B) Flat worms

C) Hook worms

D) Thread worms

70 / 100

Category: Biology Ch 6 Class 11

The cell membrane of a bacterial cell often invaginates to produce membranous structures referred to as:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Centrosomes

B) Mesosomes

C) Dictyosomes

D) Polysomes

71 / 100

Category: Biology Ch 10 Class 11

The radial symmetry is found in the animals of

Protozoa

Porifera

Cnidaria

All of these

72 / 100

Category: Biology Ch 6 Class 12

In DNA A.

A forms two bonds with T

G forms three bonds with C

A forms three bonds with T

Both a and b

73 / 100

Category: Biology Ch 7 Class 11

Golden algae are also known as

Chrysophyta

Phaeophyta

Pyrrophyta

Rhodophyta

74 / 100

Category: Biology Ch 7 Class 11

Which of the protozoa has a striking resemblance to collar cells in sponges?

Zooflagellates

Choanflagellates

Trypanosomoa

Trichonymphas

75 / 100

Category: Biology Ch 10 Class 12

In the Hardy – Weinberg principle, p2 + 2pq + q2 = 1 . q2 represents the frequency of the:

NTS 2010
Biology
Evolution
Elimination Tool:

A) Homozygous dominant

B) Heterozygous dominant

C) Heterozygous recessive

D) Homozygous recessive

76 / 100

Category: Biology Ch 9 Class 11

Which of the following statements is a correct distinction between autotrophs and heterotrophs?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Only heterotrophs require chemical compunds from the environment

B) Cellular respiration is unique to heterotrophs

C) Autotrophs, but not heterotrophs can nourish themselves beginning with nutrients that are entirely inorganic.

D) Only heterotrophs have mitochondria

77 / 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

78 / 100

Category: Biology

Q.66 Which of the following provides the strong evidence in support of evolution:

A. Fossil record

B. Comparative embryology

C. Comparative anatomy

D. Molecular biology

79 / 100

Category: Biology Ch 12 Class 12

Ecosystem of Shogran is

Coniferous alpine

Boreal

temperate deciduous

Grassland

80 / 100

Category: Biology Ch 6 Class 12

The biochemical analysis of a sample of DNA shows that 32% of the nitrogenous bases are cytosine. What is the total % of adenine and uracil in RNA transcribed from this DNA?

NTS 2015 SMBBMC
Biology
Chromosomes and DNA
Elimination Tool:

A) 16%

B) 18%

D) 36%

C) 32%

81 / 100

Category: Biology Ch 3 Class 12

Na+ -K+ ATPase pump is important for:

Maintenance of resting potential.

Massive out flux of K+ after depolarization.

Recovery of resting potential.

Conversion of resting potential into action potential.

82 / 100

Category: Biology

To overcome infertility, which technique is used?

NUMS Mock 4
Biology
Reproduction

A) In vitro fertilization

B) In vivo fertilization

C) Both Options A and B are correct

D) None of these options is correct

83 / 100

Category: Biology Ch 4 Class 12

Referring to sexual reproduction, humans are:

NTS 2018
Biology
Reproduction
Elimination Tool:

A) Hermaphrodites

B) Vivaparous

C) Oviparous

D) Self-fertilized

84 / 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

85 / 100

Category: Biology Ch 10 Class 11

The only aquatic arthropods:

PMC Sample 1
Biology
Kingdom Animalia
Elimination Tool:

A) Crustaceans

B) Arachnids

C) Myriapods

D) Gastopods

86 / 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

87 / 100

Category: Biology

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

A. Pq

B. Pc

C. Pt

D.Po

88 / 100

Category: Biology Ch 4 Class 12

All of the following are sexually transmitted diseases except:

NTS 2011
Biology
Reproduction
Elimination Tool:

A) Syphilis

B) Gonorrhea

C) Alzheimer's Disease

D) Genital Herpes

89 / 100

Category: Biology Ch 9 Class 12

Which of the following diseases CANNOT be cured by gene therapy?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) SCID

B) Tuberculosis

C) Cystic fibrosis

D) Cancer

90 / 100

Category: Biology Ch 9 Class 11

Antheridiophore and archegoniophore are found in

Marchantia

Funaria

Both of these

None of these

91 / 100

Category: Biology

Q.53 In case of snake bite, the most appropriate strategy to provide immunity would be:

A. Actively induced immunity

B. Artificial passive immunity

C. Naturally induced immunity

D. Auto immunity

92 / 100

Category: Biology Ch 7 Class 12

Meiosis occur in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

93 / 100

Category: Biology Ch 2 Class 12

Which one of the following forms the blk of exoskeleton of an arthropod?

Epicuticle

Procuticle

Ectocuticle

None of these

94 / 100

Category: Biology Ch 1 Class 12

Among the followings which is the most longest supportive cell?

Tracheids

Sclereids

Trachea

Collenchyma cells

95 / 100

Category: Biology

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

NUMS Mock 1
Biology
Transport

A) 80 ml

B) 90 ml

C) 70 ml

D) 60 ml

96 / 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

97 / 100

Category: Biology

The autonomic nervous system controls all of the following activities except:

NUMS Mock 1
Biology
Coordination and Control

A) Digestion of food

B) Heart beat

C) Contraction of pupil of eye

D) Thought

98 / 100

Category: Biology Ch 9 Class 12

Chimaeric DNA is also known as

Recombinant DNA

Complementary DNA

Vector

Plasmid

99 / 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

100 / 100

Category: Biology Ch 10 Class 11

Pseudocoelom is actually derived from:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Blastocoel

B) Gastrocoel

C) Neurocoel

D) Haemocoel

Your score is

The average score is 57%

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