Biology Practice Test 3

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MDCAT Practice Tests

Biology Practice Test 3

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1 / 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

2 / 100

Category: Biology Ch 8 Class 12

A pure breeding tall plant was crossed to dwarf plant. What would be probability of “Tt” genotype in F2

0.25

0.5

0.75

0

3 / 100

Category: Biology Ch 3 Class 11

A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called

Active site

Binding site

Catalytic site

Allosteric site

4 / 100

Category: Biology

Q.6 The uterus of the female reproductive system opens into the?

A. placenta

B. birth canal

C. cervix

D. all of these

5 / 100

Category: Biology Ch 7 Class 11

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

Dinoflagellates

Zooflagellates

Protozoans

Algae

6 / 100

Category: Biology Ch 3 Class 12

At the induction of action potential opening of Na+ gate with influx of Na+ is a _________ processes:

Active transport

Passive transport.

Diffusion

none of these.

7 / 100

Category: Biology

A man who has type AB blood cannot father a child with type ___ blood, because he would pass on either the ___ or the B allele to all of his offspring.

NUMS Mock 4
Biology
Variation and Genetics

A) A,O

B) O,A

C) B, O

D) B, A

8 / 100

Category: Biology Ch 10 Class 12

Modification in the organization of the basic pentadactyl limb structure found in vertebrates provides good evidence for the principle of:

NUMS 2020
Biology
Evolution
Elimination Tool:

A) Adaptive radiation

B) Convergent evolution

C) Genetic drift

D) Inheritance of acquired characters

9 / 100

Category: Biology Ch 4 Class 11

60S and 40S subunit combine to form ______ particle

100 S

90 S

80 S

70 S

10 / 100

Category: Biology Ch 12 Class 11

Nitrogen

Magnesium

Iron

Both A and B

11 / 100

Category: Biology Ch 8 Class 12

A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

Segregation

Independent assortment

Both of these

None of these

12 / 100

Category: Biology Ch 9 Class 11

The botanical name of gum tree ls:

NTS 2013
Biology
Kingdom Plantae
Elimination Tool:

A) Acacia nilotica

B) Mimosa pudlca

C) Acacla catechu

D) Prosopls glandulose

13 / 100

Category: Biology Ch 1 Class 11

The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called :

Environmental biology

Human biology

Both b and c

14 / 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.

15 / 100

Category: Biology Ch 12 Class 11

All of the insectivorous plants are true

Heterotrophs

Autotrophes

Carnivores

Saprotrophs

16 / 100

Category: Biology Ch 10 Class 11

Organs which produce voice in birds is:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Larynx

C) Syrinx

B) Pharynx

D) Both A and C

17 / 100

Category: Biology Ch 10 Class 11

Which organism has wings with claws?

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Eagle

B) Kestrel

C) Archaeopteryx

D) Mallard

18 / 100

Category: Biology Ch 10 Class 11

An amphibian’s heart has ______ chambers:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Two

B) Three

C) Four

D) Five

19 / 100

Category: Biology Ch 5 Class 11

Allium cepa is the scientific name of :

Onion

Amaltas

Potato

Tomato

20 / 100

Category: Biology Ch 13 Class 11

The infection of lungs is called:

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Emphysema

B) Asthma

C) Pneumonia

D) Bronchitis

21 / 100

Category: Biology Ch 13 Class 12

Which of the following is not correct for food web?

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

A) Start with primary consumers

B) Formed from food chain

C) Stable than food chain

D) Complex with food chain

22 / 100

Category: Biology Ch 11 Class 11

The main process that occurs in the dark reaction in photosynthesis is:

NTS 2010
Biology
Bioenergetics
Elimination Tool:

A) That water is split.

B) Light energy is converted into chemical energy.

C) That glucose is oxidized.

D) That carbon-dioxide is fixed.

23 / 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

24 / 100

Category: Biology Ch 10 Class 12

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

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Malthus

C) Lamark

D) Alfred Wallace

25 / 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

26 / 100

Category: Biology Ch 10 Class 12

Which factor decides what type of variation should be flourished and passed on to the next generations?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Species

B) Population

C) Survival

D) Environment

27 / 100

Category: Biology

Q.16 Example of convergent evolution is

A. Forelimbs of man and bat

B. Wings of birds and insects

C. Darwin's finches

D. All of above

28 / 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

29 / 100

Category: Biology

Q.8 How many carbon atoms contribute to form glucopyranose?

3

5

4

6

30 / 100

Category: Biology Ch 3 Class 11

The rate of reaction is directly proportional to the concentration of an enzyme which statement is incorrect in this respect:

Increase in enzyme molecule increases the available active sites.

This relation is for unlimited time period with unlimited enzyme concentration

If the concentration is doubled the rate will become two fold.

None of these.

31 / 100

Category: Biology Ch 4 Class 12

Testes are structures that produce:

NTS 2015 SMBBMC
Biology
Reproduction
Elimination Tool:

A) Spores

B) Sperms

C) Seeds

D) Ova

32 / 100

Category: Biology Ch 4 Class 11

Suggest which among the following is not a function attributed to endoplasmic reticulum?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Detoxification of poisons and drugs

B) Digestion/egestion of foreign materials outside the cell

C) Manufacture of fat and lipid molecules

D) Biogenesis of membrane proteins

33 / 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

34 / 100

Category: Biology Ch 9 Class 11

Which of the following features differentiate angiosperms from gymnosperms?

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

A) Pollens disperse by air

B) Haploid microspores

C) Ovaries

D) Pollen tubes

35 / 100

Category: Biology Ch 9 Class 12

Natural extrachromosomal circular DNA molecules earrying genes for antibiotic resistance and fertility

Recombinant DNA

Chimaeric DNA C

Lambda phage

Plasmids

36 / 100

Category: Biology Ch 2 Class 11

Glucose and fructose join together through _____ to form sucrose.

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) 1, 4 glycosidic linkage

B) 1, 6 glycosidic linkage

D) 1,3 glycosidic linkage

C) 1,2 glycosidic linkage

37 / 100

Category: Biology

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

NUMS Mock 3
Biology
Support and Movement

A) Carpals

B) Metacarpals

C) Phalanges

D) Tarsal

38 / 100

Category: Biology Ch 8 Class 11

An association in which fungal hyphae penetrate the outer cells of the plant root forming coils swellings and minute branches and also extend out into surrounding soil is called:

Mycorrizael association

Endomycorrhizae

Ectomycorrhizae

Lichen

39 / 100

Category: Biology Ch 11 Class 11

In paper chromatography xanthophyll will give ______ color:

NTS 2010
Biology
Bioenergetics
Elimination Tool:

A) Orange

B) Grey

C) Yellow

D) Blue-Green

40 / 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

41 / 100

Category: Biology Ch 12 Class 12

Which statement is incorrect?

Average rainfall in temperate deciduous forests is 750-1500mm

empera ture of coniferous alpine and boreal forests is upto 10 degrees

Northern coniferous forests are called Taiga

Coniferous forests located at high latitude are alpine

42 / 100

Category: Biology

Q.30 Arterial blood contains ___________of CO2/100 ml of blood:

54

50

64

60

43 / 100

Category: Biology Ch 5 Class 11

Binomial nomenclature was proposed for the first time by:

NTS 2010
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Charles Darwin (1859)

B) Rudolph virchow (1855)

C) Louis Pasteur (1862)

D) Carolus Linnaeus (1707)

44 / 100

Category: Biology Ch 10 Class 11

The function of coelom is

To increase the size of the animals

To help in the functioning of reproductive system

To provide space for the development of organs and systems

None of these

45 / 100

Category: Biology Ch 6 Class 11

Purple non-sulphur bacteria is an example of which of the following?

PMC Practice 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) Heterotrophic bacteria

B) Saprotrophic bacteria

C) Chemosynthetic bacteria

D) Photosynthetic bacteria

46 / 100

Category: Biology Ch 14 Class 11

Antibodies are manufactured in:

PMC 2020
Biology
Transport
Elimination Tool:

A) T Lymphocytes

B) Red Blood Cells

C) Platelets

D) B Lymphocytes

47 / 100

Category: Biology

Icosahedral viruses have how many faces?

NUMS Mock 4
Biology
Variety of Life

A) 20

B) 30

C) 10

D) 40

48 / 100

Category: Biology Ch 11 Class 11

Of the following which one is not an energy releasing process?

Glycolysis

Respiration

Photosynthesis

Kreb's cycle

49 / 100

Category: Biology

Lymph nodes are not present:

NUMS Mock 1
Biology
Coordination and Control

A) Neck region

B) Axilla

C) Groin

D) Spleen

50 / 100

Category: Biology Ch 8 Class 11

Type of lichen which tightly attaches to rocks is

Parmelia

Fruticose

Foliose

Crustose

51 / 100

Category: Biology Ch 8 Class 11

Root like structure in saprotrophic fungi are called

Rhizodis

Haustoria

Hyphae

Constricting rings

52 / 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

53 / 100

Category: Biology Ch 2 Class 11

Glucose and fructose join together through _____ to form sucrose.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 1, 4 glycosidic linkage

B) 1, 6 glycosidic linkage

C) 1,2 glycosidic linkage

D) 1,3 glycosidic linkage

54 / 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

55 / 100

Category: Biology Ch 9 Class 12

In prokaryotes only one type of RNA polymerase is present, while ______ types of RNA polymerase are present in eukaryotes.

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) Two

B) Three

C) Four

D) Five

56 / 100

Category: Biology Ch 4 Class 12

The sexually transmitted disease, that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is:

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) AIDS

B) Hepatitis

C) Gonorrhoea

D) All of these

57 / 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

58 / 100

Category: Biology

Lysosomes function in:

NUMS Mock 1
Biology
Cell Structure and Function

A) Protein synthesis

B) Processing

C) Intracellular digestion

D) Lipid synthesis

59 / 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

60 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

61 / 100

Category: Biology

Q.15 Urethra and vagina have openings to the exterior:

A. common

B. independent

C. Both A and B

D. None of these

62 / 100

Category: Biology Ch 12 Class 12

Ecosystem of Shogran is

Coniferous alpine

Boreal

temperate deciduous

Grassland

63 / 100

Category: Biology Ch 7 Class 11

The disease caused by Protozoal infection is:

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Rickets

B) Goiter

C) Malaria

D) Beri-beri

64 / 100

Category: Biology Ch 4 Class 11

Which of the following is not a basic unit of the cell?

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Cell wall

B) Cell membrane

C) Nucleus

D) Ribosome

65 / 100

Category: Biology Ch 4 Class 11

Protein layers which are NOT continuous on the surface make ________ percent of total in plasma membrane.

NUMS 2019 Cancelled
Biology
Cell Structure and Function
Elimination Tool:

A) 50 – 60

B) 60 – 70

C) 60 – 80

D) 70 – 80

66 / 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

67 / 100

Category: Biology Ch 13 Class 11

Nicotine in tobacco:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Decreases the heart rate

B) Decreases the blood pressure

C) Block the transport or oxygen

D) Paralyzes cells

68 / 100

Category: Biology Ch 3 Class 12

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Trypsin

B) Pepsin

C) Chymotrypsin

D) Amylase

69 / 100

Category: Biology Ch 7 Class 12

Meiosis occur in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

70 / 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

71 / 100

Category: Biology Ch 13 Class 12

Flow of energy in an ecosystem is:

NUMS 2014
Biology
Man and His Environment
Elimination Tool:

A) Unidirectional

B) Tridirectional

C) Multidirectional

D) Bidirectional

72 / 100

Category: Biology Ch 9 Class 11

The space between the overtopped dichotomous branches was occupied by a sheet of which cells during evolution of megaphylls?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) Sclerenchyma

B) Parenchyma

C) Collenchyma

D) Chlorenchyma

73 / 100

Category: Biology Ch 1 Class 12

Reabsorption of calcium is triggered by:

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Parathormone

C) Antidiuretic

D) Vasopressin

74 / 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.

75 / 100

Category: Biology Ch 4 Class 11

Detoxification of drugs is the function of _____ in a cell.

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) R.E.R

B) S.E.R

C) Liver cells

D) Lysosome

76 / 100

Category: Biology Ch 10 Class 12

Adaptation of traits to better fill a niche is known as which of the following?

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) polymorphism

B) gene linkage

C) specialization

D) replication

77 / 100

Category: Biology

Q3 Assymetrical body is a feature of phylum

A. Annelida

B. Arthropoda

C. Porifera

D. Cnidaria

78 / 100

Category: Biology

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

NUMS Mock 4
Biology
Chromosomes and DNA

A) DNA polymerase

B) Ligase

C) Primase

D) Endonuclease

79 / 100

Category: Biology Ch 8 Class 11

Fungi can tolerate pH from

3?7

2?6

2?9

. 3?6

80 / 100

Category: Biology

Q.32 Lymphocytes are found in:

A. Lymph capillary

B. Lymph vessel

C. Lymph trunk

D. lymph node

81 / 100

Category: Biology

The thickest chamber of the human heart is:

NUMS Mock 4
Biology
Transport

A) Left atrium

B) Right atrium

C) Right ventricle

D) Left ventricle

82 / 100

Category: Biology Ch 3 Class 12

The _____ is the main nutritional part and it’s concerned with the biosynthesis of materials necessary for neurons.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Nerves

B) Axon

C) Soma

D) Dendrites

83 / 100

Category: Biology Ch 10 Class 11

Actinia is the biological name of:

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Sea Anemone

B) Corals

C) Obelia

D) Jellyfish

84 / 100

Category: Biology Ch 8 Class 11

The most common example of members of the kingdom fungi is/are:

NUMS 2019 Reconduct
Biology
Kingdom Fungi
Elimination Tool:

A) Star fish

B) Mushrooms

C) Algae

D) Human

85 / 100

Category: Biology Ch 8 Class 12

A man with blood group “A” marries a woman of blood group “B”. Both are heterozygous. What is the off-springs having phenotype “O”

Zero

25%

50%

75%

86 / 100

Category: Biology Ch 9 Class 11

Mosses are included in sub-division

Anthoceropsida

Hepaticopsida

Bryopsida

Lycopsida

87 / 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%

88 / 100

Category: Biology Ch 14 Class 11

Minerals salts enter a plant largely through its:

NTS 2015 SMBBMC
Biology
Transport
Elimination Tool:

A) Root hair

B) Stomata

C) Guard cells

D) Cell wall

89 / 100

Category: Biology Ch 1 Class 12

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment

Trimethyl alanine

Ammonia

Trimethylamine oxide

90 / 100

Category: Biology

Q.53____________________are among smallest known virus

A. Picornavirus

B. Parvoviruses

C. Herpes virus

D. Rotavirus

91 / 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

92 / 100

Category: Biology Ch 2 Class 12

Endoskeleton is secreted by:

Ectoderm

Endoderm

Mesoderm

All of these

93 / 100

Category: Biology Ch 7 Class 12

Crossing over is an exchange of genes between _______ resulting in a mixture of parental characteristics in offspring.

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Sister Chromatids

B) Non-homologous Chromosomes

C) Sex chromosomes

D) Homologous chromosomes

94 / 100

Category: Biology Ch 14 Class 11

In the human body, blood circulating from the gut to the heart passes through the:

NTS 2013
Biology
Transport
Elimination Tool:

A) aorta

B) kidneys

D) lungs

C) llver

95 / 100

Category: Biology Ch 6 Class 11

Germ theory of disease has ______ postulates

3

5

4

6

96 / 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

97 / 100

Category: Biology Ch 1 Class 12

The water content of mammalian blood is regulated by antidiuretic hormone(ADH). In which part of the nephron does regulation occur ?

NTS 2015 SMBBMC
Biology
Homeostasis
Elimination Tool:

A) The ascending limb of the loop of gentle

B) The collecting duct

C) The descending limb of the loop of gentle

D) The proximal convoluted tubule

98 / 100

Category: Biology Ch 8 Class 11

In rhizopus, zygote forms temporary, dormant, thick-walled resistant structure called:

UHS 2015
Biology
Kingdom Fungi
Elimination Tool:

A) Zygospore

B) Spore

D) Hydra

C) Sporangia

99 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

Plant

Fungus

Animal

Algae

100 / 100

Category: Biology Ch 12 Class 11

Nodules on roots of leguminous plants have _____ bacteria

Anaerobic

Nitrogen fixing

Nitrifying

Ammonifying

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