Biology Practice Test 2

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 2

This is the Free Access to Limited MCQs. Enroll to PLS Boost Premium Bundle to Get More MCQs HERE

1 / 100

Category: Biology Ch 5 Class 12

______ is the reconstruction of the lost part of the body.

NTS 2012
Biology
Growth and Development
Elimination Tool:

A) Growth

B) Development

C) Regeneration

D) Blastulation

2 / 100

Category: Biology Ch 1 Class 11

The study of fossils is called:

Environmental Biology

Historical biology

Palaeontology

Social biology

3 / 100

Category: Biology

Which of the following will not undergo aldol condensation?

NUMS Mock 2
Chemistry
Aldehydes and Ketones

A) Acetaldehyde

B) Propanaldehyde

C) Benzaldehyde

D) Trideuteroacetaldehyde

4 / 100

Category: Biology Ch 10 Class 11

Platyhelminthes means:

NTS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) Flat worms

B) Roundworms

C) Segmented worms

D) None of the above

5 / 100

Category: Biology Ch 12 Class 11

Midgut in cockroach is a short narrow tube called

Hepatic caeca

Gizzard

Stomach

Rectum

6 / 100

Category: Biology Ch 5 Class 11

Mark the one Kingdom having the most conspicuous living organisms?

NTS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Monera

B) Protista

C) Animalia

D) Plantae

7 / 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

8 / 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

9 / 100

Category: Biology Ch 12 Class 11

Undigested food in cockroach is stored in:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Crop

B) Rectum

C) Gizzard

D) Crop & Rectum

10 / 100

Category: Biology

The causes of Cyanosis include:

NUMS Mock 2
Biology
Transport

A) Deficiency of vitamin C

B) Varicella-zoster virus

C) Degeneration of the cartilage of joints

D) Ventricular septum defect

11 / 100

Category: Biology Ch 7 Class 12

Mitosis occurs in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

12 / 100

Category: Biology

Bones of the skull are joined by:

NUMS Mock 2
Biology
Support and Movement

A) Fixed joints

B) Sliding joints

C) Pivot joints

D) Hinge joints

13 / 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

14 / 100

Category: Biology Ch 4 Class 11

The following are all features of eukaryotic cells:

I. chloroplast

II. peroxisome

III. lysosome

IV. mitochondrion

v. nucleus

Which of these have a double membrane?

NTS 2014
Biology
Cell Structure and Function
Elimination Tool:

A) I, II and IV

B) I, III and V

C) I, IV and V

D) II, III and V

15 / 100

Category: Biology Ch 14 Class 11

75% osmotic pressure of blood is maintained by:

NUMS 2015
Biology
Transport
Elimination Tool:

A) Globulin

C) Fibrinogen

B) Prothrombin

D) Albumin

16 / 100

Category: Biology Ch 7 Class 12

In gametogenesis, which resultant product is non-functional?

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Spermatogonia

B) Oogonia

C) Polar body

D) Ovum

17 / 100

Category: Biology

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

NUMS Mock 1
Biology
Nutrition

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

18 / 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

19 / 100

Category: Biology Ch 2 Class 12

Muscles that are attached to bones and have voluntary movements are termed as ______ muscles.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Cardiac

B) Smooth

C) Skeletal

D) Hard

20 / 100

Category: Biology Ch 7 Class 11

In which of the following growth phases, the number of bacteria increases the most rapidly?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Death / Decline phase

21 / 100

Category: Biology Ch 11 Class 11

Where do the light – dependent reactions of photosynthesis occur?

NTS 2016 SMBBMC
Biology
Bioenergetics
Elimination Tool:

A) In the guard cells of the stomata

B) Stroma of chloroplast

C) In the thylakoid membrane of chloroplast

D) Cytoplasm of leaf cell

22 / 100

Category: Biology Ch 10 Class 12

Analogous organs show

Convergent evolution

Divergent evolution

Straight evolution

Zig-zag evolution

23 / 100

Category: Biology Ch 8 Class 12

______ are more common in human males than females.

NUMS 2016
Biology
Variation and Genetics
Elimination Tool:

A) X-linked dominant traits

B) X-linked recessive traits

C) Y-linked dominant traits

D) Autosomal linked recessive traits

24 / 100

Category: Biology

Q.19 Darwins theory mainly focuses o

A. Origin of life

B. How Orgais extinct

C. How new Species arise

D How organism form

25 / 100

Category: Biology

Photosystems are located in _

A. Stroma

B. Chloroplast envelope

C. Thylakoid membranes

D. The intergrana

26 / 100

Category: Biology Ch 5 Class 11

The viruses are:

NTS 2011
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Cellular

B) Prokaryotes

C) Non-cellular

D) Eukaryotes

27 / 100

Category: Biology Ch 6 Class 12

Mutations can occur in:

NUMS 2016
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA

B) Protein

C) RNA

D) A and C

28 / 100

Category: Biology Ch 12 Class 11

Intrinsic factor is secreted by:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Pancreas

B) Liver

C) Stomach

D) Duodenum

29 / 100

Category: Biology Ch 8 Class 12

Genotype of blood group ‘AB’ in human is ______.

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

A) IA IB

B) IB Io

C) IA IA

D) IoIo

30 / 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

31 / 100

Category: Biology Ch 13 Class 11

A disease caused by gradual breakdown of the thin walls of alveoli is;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tuberculosis

B) Asthma

C) Emphysema

D) Bronchitis

32 / 100

Category: Biology Ch 4 Class 12

In sexual reproduction, plants have diplohaplontic life cycle with alternating

Diploid sporophyte and haploid gametophyte generations

Haploid sporophyte and diploid gametophyte generations

Diploid sporophyte and diploid gametophyte generations

Haploid sporophyte and haploid gametophyte generations

33 / 100

Category: Biology Ch 4 Class 12

In parthenocarpy which levels are high in ovaries

Gibberalins

Cytokinins

Auxins

All of these

34 / 100

Category: Biology Ch 13 Class 12

Hydroelectricity is generated by using ______ of falling water.

Potential energy

Gravitational energy

Kinetic energy

. All of these

35 / 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

36 / 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

37 / 100

Category: Biology Ch 4 Class 12

Viviparous animals are those in which

. Internal fertilization with external development in eggs

Internal fertilization with internal development inside female body

Internal fertilization and internal development followed by hatching of egg

External fertilization with external development

38 / 100

Category: Biology Ch 9 Class 12

The Plasmid pBR322 has antibiotic resistance genes for:

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) Streptomycin

B) Ampicillin and Tetracycline

C) Tetracycline and mxycycline

D) Ampicillin

39 / 100

Category: Biology

Q.33 The presence of peptidoglycan in Gram positive bacteria is

A. 40% of dry weight

B. 50% of dry weight

C. 10% of dry weight

D. 80%% of dry weight

40 / 100

Category: Biology Ch 1 Class 11

Oxygen accounts for ____ % of totals human body mass:

65%

18%

10%

3%

41 / 100

Category: Biology

Q.17 Teichoic acids are the characters of:

A. Gram Positive bacteria

B. Mycoplasma

C. Gram Negative bacteria

D. Archaeobacteria

42 / 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

43 / 100

Category: Biology

The animals that feed on organic debris from decomposing plants and animals are called:

NUMS Mock 1
Biology
Man and His Environment

A) Herbivores

B) Carnivores

C) Omnivores

D) Detritivores

44 / 100

Category: Biology Ch 5 Class 12

The process of aging:

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) Can be slowed down by adequate sleep

B) Can be slowed down by regular meals

C) Cannot be slowed down in any way

D) can be slowed by adequate sleep and regular meal

45 / 100

Category: Biology Ch 4 Class 12

Gametes in animals are produced by

Mitosis

RedMeiosis

BlueFission

Apomixis

46 / 100

Category: Biology Ch 7 Class 11

Radiolarians belong to which of the following protozoal group?

Zooflagellates

Actinopods

Foraminifera

Apicomplexans

47 / 100

Category: Biology Ch 6 Class 11

The causing agent of the tuberculosis that grows very well in poor living conditions and malnutrition is:

NUMS 2019 Cancelled
Biology
Kingdom Prokaryote
Elimination Tool:

A) Spirobacterium

B) Mycobacterium

C) E.Coli

D) Staphylococcus

48 / 100

Category: Biology Ch 14 Class 11

Fibrinogen is necessary for:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Metabolism

B) Respiration

C) Reproduction

D) Clotting

49 / 100

Category: Biology Ch 14 Class 11

Which of the following has oxygenated blood?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Renal veins

B) None

C) Pulmonary artery

D) Hepatic portal veins

50 / 100

Category: Biology Ch 8 Class 11

In an ecosystem mycorrhizae are an example of:

UHS 2013
Biology
Kingdom Fungi
Elimination Tool:

A) Predation

B) Symbiosis

C) Mutualism

D) Parasitism

51 / 100

Category: Biology Ch 3 Class 11

If the non-protien part is loosely attached to the protein part in the enzyme, it is known as ______.

PMC Practice 3
Biology
Enzymes
Elimination Tool:

A) Coenzyme

B) Prosthetic group

C) Cofactor

D) Apoenzyme

52 / 100

Category: Biology Ch 2 Class 12

Which of the following animal has a hydrostatic skeleton:

Earthworm

Round worm

Tape worm.

Pin worm

53 / 100

Category: Biology Ch 5 Class 11

What type of virus is the smallpox virus?

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

A) DNA enveloped virus

B) RNA enveloped virus

C) DNA virus

D) RNA naked virus

54 / 100

Category: Biology Ch 3 Class 11

Most enzymes have an optimum temperature of around:

PMC 2020
Biology
Enzymes
Elimination Tool:

A) 30 C

B) 40 C

C) 50 C

D) 20 C

55 / 100

Category: Biology Ch 9 Class 11

In bryophytes fertilization takes place in

Antheridia

Archegonia

water

Ovule

56 / 100

Category: Biology Ch 1 Class 12

When a frog is kept in water for some time it sheds a thin covering of skin called ____

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Cuboidal epithelium

B) Squamous epithelium

C) Columnar epithelium

D) Ciliated epithelium

57 / 100

Category: Biology Ch 3 Class 12

The estrogen hormone secretion during the oogenesis is stimulated by:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) LH hormone

B) Inhibition hormone

C) FSH hormone

D) Testosterone hormone

58 / 100

Category: Biology Ch 1 Class 12

Which of the following occurs in the body in response to the secretion of Glucagon?

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Conversion of glucose to glycogen in liver cells

B) Decrease in blood glucose concentration

C) Increased uptake of glucose by muscle cells

D) Production of cyclic AMP in target cells

59 / 100

Category: Biology Ch 7 Class 12

During interphase of the cell cycle, which of the following stage is for duplication of DNA:

NUMS 2019 Reconduct
Biology
Cell Cycle
Elimination Tool:

A) G0 phase

B) G1 phase

D) S phase

C) G2phase

60 / 100

Category: Biology Ch 9 Class 11

Such inflorescence in which the main axis is elongated and bears sessile flowers is called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Raceme

C) Cyme

B) Spike

D) Panicle

61 / 100

Category: Biology Ch 10 Class 12

On Galapagos island, among the birds, ____ caught much attention of Darwin in formulating his work, related to adaptations.

NUMS 2019 Reconduct
Biology
Evolution
Elimination Tool:

A) Pigeons

B) Ravens

C) Finches

D) Parrots

62 / 100

Category: Biology Ch 13 Class 11

Parabronchi are open at ______ end/s

Single

Both

Do not have opening

None of these

63 / 100

Category: Biology

The idea that opposed the idea of abiogenesis was proposed by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Robert Hooke

B) Robert Brown

C) Rudolph Virchow

D) Lorenz Oken

64 / 100

Category: Biology Ch 12 Class 12

Weather refers to

Short-term fluctuations in temperature, cloud cover, wind and precipitation

It prevails over periods of hrs or days

Overall patterns of weather that prevail from year to year

. Both a and b

65 / 100

Category: Biology Ch 3 Class 11

An enzyme increases the speed of a reaction:

NTS 2012
Biology
Enzymes
Elimination Tool:

A) by adding activation energy requirements

B) by lowering the activation energy requirements

C) by decreasing the concentration of products

D) by increasing the concentration of products

66 / 100

Category: Biology Ch 4 Class 12

Example of ovoviviparous

Reptiles

Mammal s

Duckbill platypus

Frog

67 / 100

Category: Biology Ch 4 Class 12

In human females, oocytes are held in the second metaphase until ________.

NUMS 2019 Reconduct
Biology
Reproduction
Elimination Tool:

A) Death

B) Birth

C) Ovulation

D) Fertilization

68 / 100

Category: Biology Ch 8 Class 11

Mycorrhizae are found in about ______ vascular plants

90%

95%

98%

96%

69 / 100

Category: Biology Ch 5 Class 11

Which of the following is the simplest form of pathogens causing diseases?

NTS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Viruses

B) Prions

C) Fungus

D) Amoeba

70 / 100

Category: Biology Ch 11 Class 11

The organisms able to use sunlight directly as a source of energy are

Plants

Animals

Omnivores

Fungi

71 / 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

72 / 100

Category: Biology Ch 5 Class 11

Which of the following are composed of proteins only which contain the information that codes for their own replication?

NUMS 2019 Reconduct
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Virus

B) Virion

C) Prions

D) Capsule

73 / 100

Category: Biology Ch 11 Class 12

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

74 / 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

75 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

76 / 100

Category: Biology

Which of the following is NOT a difference that would allow one to distinguish between a prokaryotic and a eukaryotic cell?

Presence of absence of the nucleus
Presence or absence of the cell wall
Membrane bound versus no membrane bound organelles
NUMS Mock 3
Biology
Cell Structure and Function

A) I only

B) II only

C) III only

D) I and II only

77 / 100

Category: Biology Ch 14 Class 11

The main cause of creation of tension between water molecules is ______ which helps to make water chains pulled up xylem sap.

NUMS 2019 Reconduct
Biology
Transport
Elimination Tool:

A) Root pressure

B) Imbibition

C) Water potential

D) Hydrogen bonding

78 / 100

Category: Biology Ch 8 Class 12

J. Seiler in 1914 discovered which type of sex determination in moths?

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

A) XO – XX

B) XY – XX

C) ZZ – ZW

D) None of the given options

79 / 100

Category: Biology Ch 3 Class 11

Antibodies can be digested by using which of the following types of enzymes?

PMC Sample 3
Biology
Enzymes
Elimination Tool:

A) Lipase

B) Protease

C) Amylase

D) Polymerase

80 / 100

Category: Biology

Q.58 Which of the following is incorrect for ascent of sap?

A. water potential

B. Cohesion tension

C. root pressure

D. imbibition

81 / 100

Category: Biology Ch 5 Class 12

The cells in our body are all genetically identical, apart from the:

PMC 2020
Biology
Growth and Development
Elimination Tool:

A) Somatic cells

B) Reproductive cells

D) White blood cells

C) Muscle fibers

82 / 100

Category: Biology Ch 13 Class 12

Which one is a non-renewable resource?

Wild life

Forests

Natural gas

Land

83 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

84 / 100

Category: Biology Ch 3 Class 11

The effect of competitive inhibitor on enzyme activity is such that it affects which of the following?

PMC Sample 2
Biology
Enzymes
Elimination Tool:

A) Increases enzyme activity

B) Doesn't change enzyme activity

C) Decreases enzyme activity

D) None of these options is correct

85 / 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

86 / 100

Category: Biology

The dark reactions of photosynthesis are characterized by:

NUMS Mock 1
Biology
Bioenergetics

A) Synthesis of ATP, O2 and NADH

B) Utilization of ATP, CO2 and NADPH

C) Electron transfer from NADPH to RuBP

D) Carbon dioxide transfer from RuBP to glucose

87 / 100

Category: Biology Ch 13 Class 11

Lungs are spongy due to the presence of million of

Air sacs

Alveoli

Bronchioles

Parabronchi

88 / 100

Category: Biology Ch 13 Class 11

The glycolate produced diffuses into the membrane bounded organelles called

Glyoxisomes

Peroxisomes

Lysosomes

Mitochondria

89 / 100

Category: Biology

Q.67 Interaction between genes occupying different loci is:

A. Dominance

B. Pleiotropy

C. Epistasis

D. Gene linkage

90 / 100

Category: Biology

Q.51 The water splitting step of photosynthesis is called?

A Hydrolysis

B. Chemiosmosis

C. Photolysis

D. Photosynthesis

91 / 100

Category: Biology Ch 9 Class 11

Which of the following statement about plants is incorrect?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) All are eukaryotes

B) They are multicellular

C) Non-motile organisms

D) Are heterotrophs

92 / 100

Category: Biology Ch 11 Class 11

Which of the following pigment is Blue- green in colour:

Chlorophyll a

. Chlorophyll b

Chlorophyll c

Chlorophyll d.

93 / 100

Category: Biology Ch 5 Class 11

Syphilis is caused by:

NUMS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Coccus

B) Bacillus

C) Spirillum

D) Spirochete

94 / 100

Category: Biology Ch 9 Class 12

Transgenic plants are produced when foreign genes are introduced into

Mature plant embryo

Immature plant embryo

Roots

Leaves

95 / 100

Category: Biology Ch 7 Class 11

Symptoms of malaria occur specifically due to the formation of:

NUMS 2015
Biology
Kingdom Protista
Elimination Tool:

A) Sporozoite

B) Merozoite

C) Gametocyte

D) Oocyte

96 / 100

Category: Biology Ch 5 Class 11

Eukaryotic, multicellular and consumers belong to ______ kingdom.

NUMS 2019 Reconduct
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Monera

B) Protista

C) Fungi

D) Animalia

97 / 100

Category: Biology Ch 9 Class 12

Human genome is ______ times larger than any other genome sequenced so far

45

35

25

15

98 / 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

99 / 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

100 / 100

Category: Biology Ch 10 Class 12

The organs which are similar in function but differ in structure are called:

PMC 2020
Biology
Evolution
Elimination Tool:

A) Analogous organs

B) Homologous organs

C) Convergent evolution

D) Divergent evolution

Your score is

The average score is 57%

0%

PLS Academy – LearnoSpot

PLS Boost Bundle