Biology Practice Test 2

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 2

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1 / 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

2 / 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

3 / 100

Category: Biology Ch 5 Class 11

The genome of the virus includes the:

PMC Sample 1
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Deoxyribonucleic acid

B) Ribonucleic acid

C) Amino acids

D) Deoxyribonucleic acid and ribonucleic acids

4 / 100

Category: Biology Ch 2 Class 12

Exoskeleton of a marine snail is composed of

CaPO4

CaCO3

CaSO4

SiO2

5 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

6 / 100

Category: Biology

Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

NUMS Mock 4
Chemistry
Hydrocarbons

A) CH4

B) C2H2

C) C2H4

D) All of the above

7 / 100

Category: Biology Ch 13 Class 11

Lungs are covered with double layered thin membranous sac called

Disphragm

Pleura

Pericardium

Rib cage

8 / 100

Category: Biology Ch 13 Class 11

During inspiration, the diaphragm:

PMC Practice 3
Biology
Gaseous Exchange
Elimination Tool:

A) Contracts

B) Relaxes

C) Contracts and relaxes

D) None of these options is correct

9 / 100

Category: Biology

Steroids consist of _____ 6 membered carbon rings and one 5 membered carbon ring.

NUMS Mock 4
Biology
Biological Molecules

A) Four

B) Three

C) Two

D) Five

10 / 100

Category: Biology Ch 3 Class 11

The enzyme found in saliva responsible for the digestion of carbohydrates is:

NTS 2018
Biology
Enzymes
Elimination Tool:

A) Lysozyme

B) Amylase

C) Pepsin

D) Trypsinogen

11 / 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

12 / 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

13 / 100

Category: Biology

Q.17 Final acceptor of electrons in respiratory chain is?

A. NADH

B. Cytochrome a3

C. Water

D. Oxygen

14 / 100

Category: Biology Ch 6 Class 11

The presence of peptidoglycan in gram-positive bacteria is:

PMC Practice 3
Biology
Kingdom Prokaryote
Elimination Tool:

A) 40% of dry weight

B) 50% of dry weight

D) 80% of dry weight

C) 10% of dry weight

15 / 100

Category: Biology

Q.25 The substrate of the trypsin is:

A. Proteins

B. Dipeptides

C. Polypeptides

D. Amino acids

16 / 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

17 / 100

Category: Biology Ch 4 Class 11

Which of the statement about cell membrane is not true?

It contains protein molecules embedded in lipid bilayer

It is a differentially permeable membrane.

It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.

It may get infolded to engulf solid or liquid material.

18 / 100

Category: Biology Ch 8 Class 11

According to two kingdom classification fungi were placed in kingdom

Plantae

Animalia

Protista

Fungi

19 / 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

20 / 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

21 / 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

22 / 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

23 / 100

Category: Biology

DNA made by joining pieces from two or more different sources:

NUMS Mock 3
Biology
Biotechnology

A) Probes

B) Restriction endonuclease

C) Mutated DNA

D) Recombinant DNA

24 / 100

Category: Biology

Which of the following organelles are present in all the bacteria?

NUMS Mock 1
Biology
Kingdom Prokaryote

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

25 / 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

26 / 100

Category: Biology Ch 9 Class 12

The process of determining the locus for particular biological traits includes?

PMC Practice 2
Biology
Biotechnology
Elimination Tool:

A) Replication

B) Recombination

C) Gene mapping

D) None of these options is correct

27 / 100

Category: Biology

Cardiac output is increased by all of the following EXCEPT:

NUMS Mock 2
Biology
Transport

A) Hypoxia

B) Exercise

C) Sleep

D) Pregnancy

28 / 100

Category: Biology Ch 3 Class 12

Neurons are cells adapted for the rapid transmission of electrical impulses. To do this, they have long thin processes called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Axons

B) Dendrites

D) Schwann cell

C) Myelin sheath

29 / 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

30 / 100

Category: Biology Ch 3 Class 12

The nerve center for sight is located in the

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Thalamus

B) Myopic

C) Both a and b

D) None of these

31 / 100

Category: Biology Ch 10 Class 12

Analogous organs show:

NUMS 2020
Biology
Evolution
Elimination Tool:

A) Straight evolution

B) Convergent evolution

C) Zig-zag evolution

D) Divergent evolution

32 / 100

Category: Biology

Q.32 In the ascent of sap, water moves up in:

A. Xylem

B. Cambium

C. Phloem

D. Endodermis

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 1 Class 11

In animals coordination is achieved by means of

Respiratory system

Nervous system

Endocrine system

Both b and c

35 / 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

36 / 100

Category: Biology Ch 13 Class 11

When abdomen expands, the number of spiracles open is

2

3

6

8

37 / 100

Category: Biology Ch 10 Class 12

According to the Hardy-Weinberg theorem, what will be the frequency of heterozygote when ‘p’ is 0.2?

NUMS 2019 Reconduct
Biology
Evolution
Elimination Tool:

A) 0.32

B) 0.38

C) 0.42

D) 0.48

38 / 100

Category: Biology Ch 11 Class 12

Hydrosere is

Secondary succession starting in a pond

. Primary succession starting in a pond

Primary succession starting on a dry soil

All of these

39 / 100

Category: Biology

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

NUMS Mock 1
Biology
Nutrition

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

40 / 100

Category: Biology Ch 3 Class 12

Resting membrane potential of neurons is _______, while during active membrane potential the inner membrane surface becomes more _____ than the outside.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) +70 mV ; negative

B) -70 mV ; negative

C) +70 mV ; positive

D) -70 mV ; positive

41 / 100

Category: Biology Ch 5 Class 11

DNA or RNA of viruses is enclosed in ______ coat:

Protein

Carbohydrate

Lipid

DNA

42 / 100

Category: Biology Ch 14 Class 11

The cells which play a very important role in developing immunity are:

PMC 2020
Biology
Transport
Elimination Tool:

A) Monocytes

B) Neutrophils

C) Lymphocytes

D) Thrombocytes

43 / 100

Category: Biology

Q.58 The enzymes required for the breakdown of glucose into pyruvate is present in:

A. Cytosol

B. Plastids

C. Mitochondria

D. Lumen of ER

44 / 100

Category: Biology Ch 10 Class 12

Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

NTS 2014
Biology
Evolution
Elimination Tool:

A) 1 and 2

B) 1 and 3

D) 2 and 3

E) 3 and 4

45 / 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

46 / 100

Category: Biology

When the concentration of the external medium is equal to the concentration of the internal medium of a cell, the situation is called:

NUMS Mock 1
Biology
Biological Molecules

A) Hypertonic

B) Hypotonic

C) Isotonic

D) Heterotonic

47 / 100

Category: Biology Ch 11 Class 11

Which of the light is mainly absorbed by the plants:

Orange

Red

Green

Both A and B

48 / 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

49 / 100

Category: Biology Ch 13 Class 11

In most birds air sacs are _____ in number

10

3

4

9

50 / 100

Category: Biology Ch 12 Class 12

Evolution of vascular bundles in plants and skeleton in animals is an adaptation for

Hdrospheric ecosystem

Aquatic ecosystem

Terrestrial ecosystem

All of these

51 / 100

Category: Biology Ch 7 Class 12

Spread of tumor cells and establishment of secondary areas of growth is

Benign tumors

Cancer

Metastasis

Epistasis

52 / 100

Category: Biology Ch 6 Class 11

The process of recombination in prokaryotes takes place in which of the following ways?

PMC Sample 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) transformation

B) conjugation

C) transduction

D) all of these

53 / 100

Category: Biology Ch 10 Class 11

The system well – developed in the acoelomate is

Excretory system

Nervous system

Both of these

Transport system

54 / 100

Category: Biology Ch 13 Class 11

During breathing air from Pharynx enters to:

UHS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Trachea

B) Bronchioles

C) Alveoli

D) Bronchi

55 / 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

56 / 100

Category: Biology Ch 9 Class 11

What is the strengthening material of the prokaryotic cell wall?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Cellulose

B) Chitin

C) Silica waxes and lignin

D) Peptidoglycan or murein

57 / 100

Category: Biology

Antheridia and archegonia are _____ organs in bryophytes.

NUMS Mock 1
Biology
Kingdom Plantae

A) Reproductive

B) digestive

C) respiratory

D) none of the above

58 / 100

Category: Biology Ch 4 Class 12

Luteinizing hormone, which is produced by the pituitary gland, promotes ovulation and stimulate the ovaries to produce:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Estrogen and progesterone

C) Progesterone

D) Oxytocin

59 / 100

Category: Biology

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

NUMS Mock 1
Biology

A) Na+

B) K+

C) Mg2+

D) Cl-

60 / 100

Category: Biology Ch 1 Class 12

Capillaries present around the loop of Henle:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Vasa recta

B) Peritubular

C) Lacteals

D) Glomerulus

61 / 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

62 / 100

Category: Biology Ch 9 Class 11

What is the name of the structure of the leaf that attaches the leaf to the stem?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) Phloem

B) Mesophyll

C) Xylem

D) Petiole

63 / 100

Category: Biology Ch 9 Class 12

A single gene can be amplified by using:

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) DNA fingerprinting

B) Polymerase Chain Reaction

C) Gel Electrophoresis

D) Recombinant DNA technology

64 / 100

Category: Biology Ch 6 Class 12

Chromosome is made of

2 chromatids +1 centromere +secondary constriction

1 chromated + 1 centromere + primary constriction

2 chromatids + 1 centromere + primary constriction

2 chromatids + 2 centromere + secondary constriction

65 / 100

Category: Biology Ch 6 Class 12

“Law of independent assortment” states:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) That each pair of alleles assort independently of other pairs of alleles during gamete formation

B) That alleles of each pair of contrasting trait have unequal probability to assort with the alleles of other pair

C) That the two coexisting alleles for each trait segregate (separate) from each other at meiosis so that each gamete receives only one of the two alleles

D) That pertain to inheritance of single trait (monohybrid cross)

66 / 100

Category: Biology Ch 12 Class 11

Carotenoids are related to:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Vitamin A

B) Vitamin B

C) Vitamin C

D) Vitamin D

67 / 100

Category: Biology Ch 4 Class 11

_______ organelles are involved in the synthesis of the plant cell wall.

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endoplasmic reticulum

B) Golgi complex

C) Lysosomes

D) Peroxisomes

68 / 100

Category: Biology Ch 8 Class 12

If the seed is heterozygous yellow (Yy). In a test cross, what will be the probability of appearance of seed colors?

NUMS 2019 Reconduct
Biology
Variation and Genetics
Elimination Tool:

A) 0 % yellow, 100 % green

B) 25 % yellow, 75 % green

C) 50 % yellow, 50 % green

D) 75 % yellow, 25 % green

69 / 100

Category: Biology

Which of the following is not an infection of the lungs/respiratory tract?

NUMS Mock 2
Biology
Gaseous Exchange

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

70 / 100

Category: Biology Ch 7 Class 11

Stentor is a/an

Ciliate

Foraniniferan

Actinopods

Apicomplexan

71 / 100

Category: Biology Ch 8 Class 12

In birds the male is the homogametic sex. A male bird showing the recessive trait was mated with a female showing the dominant trait of a characteristic governed by a pair of alleles which are sex-linked. What is the probability that the male offspring will show the dominant trait?

NTS 2014
Biology
Variation and Genetics
Elimination Tool:

A) 0

B) 0.25

C) 0.50

E) 1.00

72 / 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

73 / 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

74 / 100

Category: Biology Ch 4 Class 12

Which characteristic is not of identical twins

. Produced by separation of two blastomeres

Have different genetic makeup

Produced asexually

Produced when embryo is at two cell stage

75 / 100

Category: Biology Ch 7 Class 11

All of the following organisms belong to the kingdom protista EXCEPT:

NTS 2012
Biology
Kingdom Protista
Elimination Tool:

A) Ulva

B) Euglena

C) Slime Mold

D) Common Mold

76 / 100

Category: Biology Ch 12 Class 11

Deficiency of K+ causes:

Stunted growth & strong chlorosis

No electron transport chains

Premature death of leaves.

Stunted growth of roots.

77 / 100

Category: Biology Ch 10 Class 11

An organism appears to be a segmented worm. Upon observation, it is determined that the organism has a closed circulation, a mouth, and an anus and does not have an exoskeleton. The organism most likely belongs to the phylum:

NTS 2010
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Annelida

C) Echinodermata

D) Arthropoda

78 / 100

Category: Biology Ch 5 Class 12

Apical meristems are located at

Tips of leaves

Tips of flowers

Tips of roots and stems

Tips of roots only

79 / 100

Category: Biology Ch 2 Class 11

The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called?

Specific Heat of Vaporization

Specific Heat capacity

Caloric Heat

Both A and C

80 / 100

Category: Biology Ch 12 Class 11

Fear of getting obese is termed as:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Bulimia nervosa

B) Anorexia nervosa

C) Dyspepsia

D) Obesity

81 / 100

Category: Biology

Q3 These animals show radial symmetry.

A. Chordates

B. Annelids

C. Cnidarian

D Round worms

82 / 100

Category: Biology Ch 5 Class 11

Numerous opportunistic diseases might attack a person suffering from which of the following diseases?

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

A) Measles

B) Influenza

C) Hepatitis A

D) AIDS

83 / 100

Category: Biology Ch 5 Class 11

Which of the following is not true for retroviruses?

NUMS 2014
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) They are cuboidal in shape

B) They are enveloped by host plasma membrane

C) They have enzyme reverse transcriptase

D) All of them are not specific

84 / 100

Category: Biology

Genetic information in the DNA is encoded as:

NUMS Mock 1
Biology
Chromosomes and DNA

A) Deoxyribose sugar

B) Ribose sugar

C) Phosphate group

D) Sequence of nitrogenous bases

85 / 100

Category: Biology Ch 4 Class 11

Which property of water helps to maintain the integrity of lipid-containing membranes?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Specific Heat Capacity

B) Hydrogen Bonding

C) Cohesion and Adhesion

D) Hydrophobic exclusion

86 / 100

Category: Biology

Q.48 Which of the following is incorrectly matched?

A. Glucagon- Beta cells

B. Corpus luteum- Progesterone

C. Insulin- Diabetes mellitus

D. Thyroid gland- Grave’s disease

87 / 100

Category: Biology Ch 4 Class 12

What is the commercial method of producing millions of seedlings in limited time?

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Parthenogenesis

B) Parthenocarpy

C) Cutting

D) Grafting

88 / 100

Category: Biology Ch 3 Class 11

The lock and key model of enzyme action was proposed by:

PMC Sample 3
Biology
Enzymes
Elimination Tool:

A) Louis Pasteur

B) Emil Fischer

C) Daniel Koshland

D) Urey Miller

89 / 100

Category: Biology Ch 14 Class 11

Which of the following are found in both arteries and capillaries?

NTS 2015 SMBBMC
Biology
Transport
Elimination Tool:

A) Collagen fibres

B) Elastic fibres

C) Endothelial cells

D) Smooth muscle cells

90 / 100

Category: Biology Ch 1 Class 12

Thick, waxy & leathery cuticle around leaves is present in

Hydrophytes

Mesophytes

Xerophytes

Halophytes

91 / 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

92 / 100

Category: Biology Ch 3 Class 12

Normal resting membrane potential of a neuron is

50 mv

60 mv

70 mv

80 mv

93 / 100

Category: Biology Ch 9 Class 12

Transgenic organisms:

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Have a foreign gene inserted into them

B) Have an important role in the large scale production of medicinal products

C) Are considered beneficial to humans

D) All of the above

94 / 100

Category: Biology Ch 5 Class 12

In plants growth is of

Four types

Five types

One type

Two types

95 / 100

Category: Biology Ch 2 Class 11

Reactions in which simple substances are combined to form complex substances are called:

Metabolic reactions

Catabolic reactions

Anabolic reactions

None of these

96 / 100

Category: Biology

Q44 Study of fossils is called

A. Mammalogy

B. Paleontology

C. Herpetology

D. Ornithology

97 / 100

Category: Biology Ch 12 Class 11

Amylase is not produced by the following type(s) of salivary gland:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

98 / 100

Category: Biology Ch 4 Class 11

During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparantus are called

Lysosomes

Primary lysosomes

Secondary lysosomes

Food vacuole

99 / 100

Category: Biology Ch 2 Class 12

Which vertebrae together are called pelvic vertebrae?

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Coccygeal and lumbar

B) Sacral and lumbar

C) Sacral and coccygeal

D) Sacral and thoracic

100 / 100

Category: Biology Ch 13 Class 12

Endangered species are

Dangerous for the life of humans

Reduced in number

Already extinct

All of these

Your score is

The average score is 57%

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