Biology Practice Test 1

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 1

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1 / 100

Category: Biology Ch 1 Class 12

Which one of the following group of animals is homeothermic?

NUMS 2014
Biology
Homeostasis
Elimination Tool:

A) Reptiles

B) Amphibians

C) Birds

D) Fishes

2 / 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

3 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in the thorax of cockroach is

2

3

5

4

4 / 100

Category: Biology Ch 2 Class 12

Scapula is the bone of the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Skull

B) Pelvic girdle

D) Vertebral column

C) Pectoral girdle

5 / 100

Category: Biology Ch 6 Class 12

In alkaptonuria

Patient's urine contains homogenetisic acid

Urine becomes black

Both a and b

Urine contains phenylalanine

6 / 100

Category: Biology Ch 6 Class 11

Which of the following has a chain arrangement?

Streptobacillus

Streptococci

Staphylococci

Both A and B

7 / 100

Category: Biology Ch 13 Class 11

Gaseous exchange in plants takes place through the:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Stomata

B) Mesophyll

C) Endoderm

D) Xylem

8 / 100

Category: Biology Ch 5 Class 11

Which of the following is NOT a viral disease?

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

A) AIDS

B) Malaria

C) Influenza

D) Chickenpox

9 / 100

Category: Biology Ch 3 Class 12

Lymph nodes are not present:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Neck region

B) Axilla

C) Groin

D) Spleen

10 / 100

Category: Biology Ch 13 Class 11

The number of stomata present per cm2 of leaf is:

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Less than 100

B) 1,000 to 60,000

C) One million

D) None of the above

11 / 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

12 / 100

Category: Biology Ch 5 Class 12

Wood is not formed in:

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) Monocots

B) Dicots

C) Gymnosperms

D) All of given

13 / 100

Category: Biology Ch 13 Class 11

Pharynx leads air into _____ through glottis.

NTS 2012
Biology
Gaseous Exchange
Elimination Tool:

A) Trachea

B) Bronchus

C) Alveoli

E) Larynx

14 / 100

Category: Biology Ch 6 Class 12

In Maxam – Gilbert method, DNA threads are:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) Chemically synthesized

B) Synthesized from mRNA

C) Synthesized by using terminating nucleotides

D) Chemically cut into pieces

15 / 100

Category: Biology Ch 11 Class 11

During cellular respiration NADH2 produces:

NUMS 2014
Biology
Bioenergetics
Elimination Tool:

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 5 ATP

16 / 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

17 / 100

Category: Biology

Which of the following diseases is sexually transmitted?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

18 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

19 / 100

Category: Biology Ch 2 Class 11

The helical structure of a protein is kept by the formation of hydrogen bond between amino acid molecules which are:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Adjacent to each other

B) In successive spiral turns

C) Between two different polypeptide chains

D) None of the given options

20 / 100

Category: Biology Ch 11 Class 11

The dark reactions of photosynthesis are characterized by:

NTS 2016 DUHS & JSMU
Biology
Bioenergetics
Elimination Tool:

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

21 / 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

22 / 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

23 / 100

Category: Biology

A person got an infection, he became ill but then he survived. What do you think which of immunity he would have developed?

NUMS Mock 1
Biology
Transport

A) Active immunity

B) Artificially induced active immunity

C) Passive immunity

D) Naturally induced active immunity

24 / 100

Category: Biology Ch 10 Class 12

Most fossils are found in the

Metamorphic rocks

Soil

Sedimentary rocks

Volcanic mountains

25 / 100

Category: Biology

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

A Hydrolysis

B. Chemiosmosis

C. Photolysis

D. Photosynthesis

26 / 100

Category: Biology Ch 5 Class 11

It is very stable and allows viruses to exist in water, air, and the ground.

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

A) Nucleoproteins

B) Nucleocapsid

C) Tail of virus

D) Capsid

27 / 100

Category: Biology

The end product of glycolysis in anaerobic respiration is:

NUMS Mock 4
Biology
Bioenergetics

A) Ethanol and Carbon dioxide

B) Lactate

C) Pyruvate

D) Both A and B

28 / 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

29 / 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

30 / 100

Category: Biology Ch 12 Class 11

Which type of mucosa cells secrete pepsinogen?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Zymogen

B) Oxyntic

C) Mucous

D) Gastric

31 / 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

32 / 100

Category: Biology Ch 9 Class 11

Thick, waxy & leathery cuticle around leaves is present in which of the following?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

D) Xerophytes

C) Halophytes

33 / 100

Category: Biology Ch 11 Class 11

NAD is an example of ______:

NUMS 2020
Biology
Bioenergetics
Elimination Tool:

A) Mononucleotide

B) Dinucleotide

C) Tri nucleotide

D) Tetra nucleotide

34 / 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

35 / 100

Category: Biology Ch 5 Class 11

Those organisms which can prepare their own food from simple inorganic material and can store energy are called

Autotrophs

Heterotrophs

Procariotique

Eu-cariotique

36 / 100

Category: Biology Ch 2 Class 11

Ptyalin can convert starch into:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Monosaccharide form

B) Oligosaccharide form

C) Polysaccharide form

D) All given options

37 / 100

Category: Biology Ch 8 Class 11

Foliose lichen are

Stem like

Branching

Leaf like

Crust like

38 / 100

Category: Biology Ch 4 Class 11

Which of the following is NOT the function of cell membranes?

NTS 2018
Biology
Cell Structure and Function
Elimination Tool:

A) Protection of cytoplasm

B) Regulating the passage of different molecules

C) Protein synthesis

D) Cellular communication

39 / 100

Category: Biology Ch 3 Class 12

Which of the following is not secreted by thyroid gland?

NTS 2015 SMBBMC
Biology
Coordination and Control
Elimination Tool:

A) Thyroxin

B) Triiodothyronine

C) Calcitonin

D) Glucagon

40 / 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

41 / 100

Category: Biology

In which of the following phases of bacterial growth, is the death rate more rapid than the multiplication rate?

NUMS Mock 2
Biology
Kingdom Prokaryote

A) Stationary phase

B) LAG phase

C) Decline phase

D) LOG phase

42 / 100

Category: Biology Ch 1 Class 12

The place of attachment of leaf with the shoot is called:

Pith

Pit

Pulvinus

Ecdysone

43 / 100

Category: Biology Ch 5 Class 11

The word virus is derived from Latin word venome meaning

Sweet fluid

Sore Fluid

Poisonous Fluid

Salty Fluid

44 / 100

Category: Biology

Hepatic and Pancreatic secretions are also stimulated by a hormone called:

NUMS Mock 4
Biology
Coordination and Control

A) Gastrin

B) Secretin

C) Glucagon

D) Insulin

45 / 100

Category: Biology Ch 9 Class 12

A single stranded nucleotide sequence that will hybridize into a certain piece of DNA is

Primer

Probe

Genome

Both a & b

46 / 100

Category: Biology Ch 7 Class 11

Photosynthesis is absent in which of the following:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Bacteria

B) None of these

C) Seaweeds

D) Mushrooms

47 / 100

Category: Biology

Q.21 The spent energy in the form pf ADP is regeneratèd by mitochondria into which of the following forni?

A. AMP

B.ATP

C.ADP

D.All of these

48 / 100

Category: Biology Ch 2 Class 12

Muscle fiber has many _____ and in turns these have many ______.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Myofibrils; sarcomeres

B) Myofibrils; thin filaments

C) Myosin; thin filaments

D) Myosin; sarcomeres

49 / 100

Category: Biology

Which one of the following is most likely to occur in a boy during puberty?

NUMS Mock 4
Biology
Reproduction

A) He produces eggs

B) His shoulders broaden

C) The colour of his eyes change

D) None of these options is correct

50 / 100

Category: Biology Ch 9 Class 11

A sponge of Antarctica which is more than a meter tall is known as?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Euplectella

B) Spongilla

C) Leucosolenia

D) Scolymastra joubini

51 / 100

Category: Biology Ch 5 Class 11

Viruses resemble living things because they:

NTS 2017
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Circulate

B) Move

C) Reproduce

D) Are crystalline

52 / 100

Category: Biology

Q.9 This is a reduced compound

A. CO2

B. O2

C. NADH

D. NAD

53 / 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

54 / 100

Category: Biology Ch 8 Class 11

The stored food in fungi is usually lipid droplets of:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Glucose

B) Glycogen

C) Starch

D) Protein

55 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of Kingdom Animalia.

All animals are ingestive heterotrophs

All animals are eukaryotes

All animals develop from the dissimilar gametes i.e. large sperm and small egg.

It is largest kingdom

56 / 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

57 / 100

Category: Biology

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

A. Pq

B. Pc

C. Pt

D.Po

58 / 100

Category: Biology Ch 6 Class 11

Which of the following structure is not present in all the bacteria?

Cell membrane

Chromatin bodies

Ribosomes

Capsule

59 / 100

Category: Biology Ch 11 Class 11

The point at which there is no net exchange of gases between leaves and atmosphere is known as

Neutral point

Compensation point

Parallel point

Competitive point

60 / 100

Category: Biology Ch 6 Class 11

Bacteria having a tuft of flagella at one end are called:

NTS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Peritrichous

B) Monotrichous

C) Lophotrichous

D) Amphitrichous

61 / 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

62 / 100

Category: Biology Ch 10 Class 11

Exoskeleton of cockroach is made up of:

NUMS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) Cartilage

B) Cuticle

C) Chitin

D) Amino acids

63 / 100

Category: Biology

Q.52 A chromosome in which a centromere stays at one end is called?

A. Metacentric

Telocentric

C. Acrocentric

D. All of these

64 / 100

Category: Biology Ch 3 Class 11

Which one forms the raw material for coenzymes?

Vitamins

Carbohydrates

Proteins

Metals

65 / 100

Category: Biology

Q.61 Herbivores always occupy :

A. T1

B. T3

C. T2

D. T4

66 / 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

67 / 100

Category: Biology Ch 12 Class 11

Useful bacteria at the large intestine of humans produce:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Vitamin K

B) Vitamin E

C) Vitamin D

D) Vitamin C

68 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria do not have flagella commonly?

Cocci

Bacilli

Streptobacilli

Vibrio

69 / 100

Category: Biology Ch 11 Class 11

Stroma of chloroplast carries the fixation of:

NUMS 2014
Biology
Bioenergetics
Elimination Tool:

A) Nitrogen

B) Oxygen

C) Carbon monoxide

D) Carbon dioxide

70 / 100

Category: Biology Ch 9 Class 11

The gametophyte of Ulva is:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Haploid

B) Diploid

C) Triploid

D) Polyploidy

71 / 100

Category: Biology Ch 10 Class 11

The adaptive feature(s) which help(s) the fish to live in water include(s):

NTS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) A tail and an air bladder

B) Unpaired and paired fins

C) Streamlined body

E) All of these options

72 / 100

Category: Biology Ch 9 Class 12

This enzyme is used to cut DNA molecule in rDNA technology

PMC Sample 2
Biology
Biotechnology
Elimination Tool:

A) ligase

B) phosphatase

C) ribonuclease

D) restriction enzyme

73 / 100

Category: Biology Ch 2 Class 12

Poliomyelitis normally affects the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Legs

B) Brain

C) Spinal cord

D) Both B and C

74 / 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

75 / 100

Category: Biology Ch 4 Class 12

A major constituent of contraceptive pills is:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Progesterone

C) Prolactin

D) Testosterone

76 / 100

Category: Biology Ch 6 Class 11

Flagella originate from

Cell membrane

Cell wall

Capsule

Basal body

77 / 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

78 / 100

Category: Biology

Tails can be regenerated in:

NUMS Mock 3
Biology
Growth and Development

A) The larvae of amphibians

B) Lizards

C) Both lizards and the larvae of amphibians

D) None of the given options

79 / 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

80 / 100

Category: Biology

Q.35 Enzymes for light-dependent reactions of photosynthesis would most likely be associated with:

A. Outer membrane of the chloroplast

B. Inner membrane of the chloroplast

C. Stroma of the chloroplast

D. Thylakoid membranes of the chloroplast

81 / 100

Category: Biology Ch 9 Class 12

Which of the following is the components / tools of recombinant DNA technology?

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Gene of interest

B) Molecular scissors

C) Molecular glue and expression system

D) All of the above

82 / 100

Category: Biology

Q.16 Retroviruses have a special enzyme ‘reverse transcriptase’ which can convert ____________into ___________.

A. DNA to DNA

B. RNA to DNA

C. DNA to RNA

D. RNA to RNA

83 / 100

Category: Biology Ch 1 Class 11

Different species of plants and animals living in the same habitat is called :

Population

Community

Biome

84 / 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 1
Biology
Enzymes

A) Feedback inhibitor

B) Non-competitive inhibitor

C) Allosteric modulator

D) Competitive inhibitor

85 / 100

Category: Biology Ch 7 Class 11

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

Dinoflagellates

Zooflagellates

Protozoans

Algae

86 / 100

Category: Biology Ch 3 Class 11

Identify the wrong statements.

(a) The substrate binds to active site of enzyme and not fitting into active site

(b) The binding of substrate induces the enzyme to alter its shape

(c) Chemical bonds of substrate break down not to form new enzyme-product complex

(d) The enzyme releases the products of the reaction and runs through catalytic cycle once again

NUMS 2019 Reconduct
Biology
Enzymes
Elimination Tool:

A) A, C

B) B, D

C) B, C

D) A, D

87 / 100

Category: Biology Ch 5 Class 12

In some cases, the blastomere can produce complete embryo so, the cleavage will be:

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Spiral and determinate

B) Spiral and indeterminate

C) Radial and determinate

D) Radial and indeterminate

88 / 100

Category: Biology Ch 7 Class 12

Gametes in animals are produced by:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

A) Meiosis

B) Fission

C) Mitosis

D) All three

89 / 100

Category: Biology Ch 11 Class 11

Many substances which are urgently required by the cell while cell absorbs them against the concentration gradient by utilizing energy in the form of:

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) ATP

B) Heat

C) GTP

D) Light

90 / 100

Category: Biology Ch 8 Class 12

Baldness is most frequent in

Men

Women

Children

Girls

91 / 100

Category: Biology Ch 3 Class 11

Optimal temperature of enzymes present in human body is

27?C

37?C

47?C

30?C

92 / 100

Category: Biology Ch 1 Class 11

A large regional community primarily determined by climate is called :

Population

Community

Biome

Habitat

93 / 100

Category: Biology Ch 3 Class 11

A reaction will proceed faster if the activation energy is?

PMC Sample 1
Biology
Enzymes
Elimination Tool:

A) High

B) Low

C) Remains the same

D) None of these options is correct

94 / 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

95 / 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

96 / 100

Category: Biology Ch 9 Class 11

Gymnosperms are referred to as “naked seeded plants”, because

NUMS 2016
Biology
Kingdom Plantae
Elimination Tool:

A) They lack ovule

B) They lack ovaries

C) The embryo is unprotected

D) They have no seed coat

97 / 100

Category: Biology Ch 11 Class 11

Exposure to ______ light is effective in photosynthesis as it enables guard cells to take up K+ and open the stomata.

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Red

B) Blue

C) Green

D) Orange

98 / 100

Category: Biology Ch 7 Class 11

Complex specialized flagellates living symbiotically in the gut of termites are

Trichonymphas

Trypanosoma

Euglena

Radiolarians

99 / 100

Category: Biology

Q.18 Which of these is not a reflex action?

A, Secretion of sweat

B. salivation

C. Flexion due to needle prick

D. blinking of eyes due to strong light

100 / 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

Your score is

The average score is 52%

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