Biology Practice Test 1

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 1

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1 / 100

Category: Biology

Q.41 The period during which a girl sexually matures is called

A. Menstrual cycle

B. Puberty

C. Childhood

D. Teens

2 / 100

Category: Biology Ch 11 Class 12

The actual location or place where an organism lives is

Environment

Biosphere

Biomass

Habitat

3 / 100

Category: Biology Ch 11 Class 11

Carbon dioxide joins the photosynthetic pathway at:

NTS 2018
Biology
Bioenergetics
Elimination Tool:

A) PSI

B) PSII

C) Light reaction

D) Dark reaction

4 / 100

Category: Biology Ch 9 Class 12

Choose the term from the following which is NOT a part of gene therapy?

NTS 2019
Biology
Biotechnology
Elimination Tool:

A) Bone marrow transplant

B) Retrovirus

C) DNA Fingerprinting

D) Somatic cells

5 / 100

Category: Biology Ch 6 Class 11

The function of a cell wall in prokaryotes is:

PMC Practice 1
Biology
Kingdom Prokaryote
Elimination Tool:

A) To give cells rigidity

B) To give specific shape

C) To protect from osmotic lysis

D) All of Above

6 / 100

Category: Biology

Erythroblastosis foetalis occurs when:

NUMS Mock 2
Biology
Variation and Genetics

A) Mother is Rh-positive and baby is Rh-negative

B) Mother is Rh-negative and the baby is Rh-positive

C) Both mother and baby are Rh-negative

D) Both mother and baby are Rh-positive

7 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

8 / 100

Category: Biology Ch 14 Class 11

What will happen, if there is an increase in plasma albumin?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Increased blood pressure

B) Increased rate of heart

C) Greater accumulation of tissue fluid

D) Decreased filtration in glomerulus

9 / 100

Category: Biology Ch 1 Class 12

The active uptake of sodium in the ascending limb or thick loop of Henle is promoted by the action of:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Thyroxine

C) ADH

D) Cortisone

10 / 100

Category: Biology Ch 12 Class 11

Which of the following are animals with pointed ends and a tube like digestive tract?

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

A) Annelida

B) Arthropoda

C) Nematoda

D) Mollusca

11 / 100

Category: Biology Ch 10 Class 12

Theory of Lamarck was based on:

NTS 2011
Biology
Evolution
Elimination Tool:

A) Adaptive modifications

B) Adaptive radiations

C) Both A and B

D) None of the above

12 / 100

Category: Biology Ch 2 Class 11

Cell wall is made up of:

NUMS 2016
Biology
Biological Molecules
Elimination Tool:

A) Cellulose

B) Cell

C) Ribosomes

D) Penicillin binding protein

13 / 100

Category: Biology Ch 9 Class 12

A genomic library is a collection of

Bacterial clones

Bacteriophage clones

Viral clones

Both a and b

14 / 100

Category: Biology Ch 10 Class 12

______ occurs because natural selection gives some alleles a better chance of survival than others:

PMC 2020
Biology
Evolution
Elimination Tool:

A) Fitness

B) Evolution

C) Crossing over

D) Artificial Selection

15 / 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.

16 / 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

17 / 100

Category: Biology Ch 7 Class 12

From each pair of centrioles ________ sets of microtubules originate

2

3

4

5

18 / 100

Category: Biology

As an essential element in living organisms, _______ ion is playing an important role in insulin secretion, the release of neurotransmitters, muscle contraction, and heartbeat regulation.

NUMS Mock 2
Biology
Coordination and Control

A) Sodium

B) Potassium

C) Calcium

D) Chloride

19 / 100

Category: Biology Ch 2 Class 12

Which of the following animal has a hydrostatic skeleton:

Earthworm

Round worm

Tape worm.

Pin worm

20 / 100

Category: Biology Ch 9 Class 11

Which of the following is included in Bryophytes?

NTS 2011
Biology
Kingdom Plantae
Elimination Tool:

A) Mosses

B) Club mosses

C) Ferns

D) Seed plants

21 / 100

Category: Biology Ch 11 Class 11

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Respiration

22 / 100

Category: Biology

Lock and Key Model for enzyme action propose by Emil Fischer suggests that:

NUMS Mock 4
Biology
Enzymes

A) Enzymes are unbiased for the substrate

B) Enzymes can modify their active sites

C) Enzymes are restricted to one reaction type

D) An enzyme can catalyze variety of reactions

23 / 100

Category: Biology Ch 4 Class 11

70S sized ribosomes are found in the cytoplasm of:

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Algae

B) Fungi

C) Protozoans

D) Bacteria

24 / 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

25 / 100

Category: Biology Ch 2 Class 12

Pseudopodia are:

NTS 2016 DUHS & JSMU
Biology
Support and Movement
Elimination Tool:

A) False feet developed in some unicellular organisms

B) Small hairlike structures present on the unicellular organisms

C) Long, like structures coming out of the mouth

D) Suckers which are attached to the walls of intestines

26 / 100

Category: Biology

The smaller (40S) of ribosome combines with larger subunit (60S) in the presence of Mg2+ ion to form _____ particle.

NUMS Mock 3
Biology
Cell Structure and Function

A) 100 S

B) 90 S

C) 80 S

D) 70 S

27 / 100

Category: Biology Ch 5 Class 11

Which one of the following is NOT a mode of transmission of AIDS?

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

A) Through unsterilized needles

B) Through contact with open wounds

D) Through holding hands

C) Through blood transfusion

28 / 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

29 / 100

Category: Biology Ch 3 Class 11

An example of competitive inhibition of an enzyme is the inhibition of;

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Succinic dehydrogenase by malonic acid

B) Cytochrome oxidase by cyanide

C) Hexokinase by glucose

D) Carbonic anhydrase by carbon dioxide

30 / 100

Category: Biology Ch 5 Class 12

When a fetus is in the uterus, what carries oxygen away from the placenta?

NTS 2013
Biology
Growth and Development
Elimination Tool:

A) The amniotic fluid

B) The amniotic sac

C) The lining of the uterus

D) The umbilical cord

31 / 100

Category: Biology

Q44 Study of fossils is called

A. Mammalogy

B. Paleontology

C. Herpetology

D. Ornithology

32 / 100

Category: Biology Ch 4 Class 11

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called

Active transport

Passive transport

Co-transport

Counter transport

33 / 100

Category: Biology Ch 4 Class 11

Which among the following sentence is not correct about the organelles?

NUMS 2019 Reconduct
Biology
Cell Structure and Function
Elimination Tool:

A) They are found in all Eukaryotic cells.

B) They are only found in multicellular organisms.

C) They coordinate to produce the cell.

D) They are small sized and mostly internal.

34 / 100

Category: Biology Ch 10 Class 11

What is the correct order of arthropod groups, from those with most legs to those with fewest legs?

NTS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) arachnids … crustaceans … insects … myriapods

B) crustaceans … myriapods … insects … arachnids

C) insects … arachnids … myriapods … crustaceans

E) myriapods … crustaceans … arachnids … insects

35 / 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

36 / 100

Category: Biology Ch 6 Class 12

What will be the approximate length of a DNA strand having 500 nucleotides?

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

HIDE ELIMINATED OPTIONS

A) 100 nm

B) 130 nm

C) 170 nm

D) 150 nm

37 / 100

Category: Biology Ch 13 Class 12

In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

NTS 2019
Biology
Man and His Environment
Elimination Tool:

A) Intraspecific competition.

B) Interspecific competition

C) Environmental competition

D) All of the above

38 / 100

Category: Biology Ch 8 Class 11

Which one of the following is different from all the rest regarding the number of cells inits body?

Rusts

Mushrooms

Molds

Yeasts

39 / 100

Category: Biology

Q.59 NADH produced during glycolysis and Krebs cycle will oxidized by:

A. Coenzyme ‘Q’

B. Cytochrome ‘c’

C. Cytochrome ‘b’

D. Cytochrome ‘a’

40 / 100

Category: Biology Ch 1 Class 12

Urine formation is the result of:

NTS 2015 SMBBMC
Biology
Homeostasis
Elimination Tool:

A) Ultrafiltration

B) Reabsorption

C) Tubular secretion

D) All of the above

41 / 100

Category: Biology Ch 12 Class 11

Of the following, which one is missing in herbivores?

Premolars

Canines

Incisors

Molars

42 / 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

43 / 100

Category: Biology Ch 6 Class 12

Rate of DNA replication by DNA polymerase is

2000 nucleotides / sec

1000 nucleotides / sec

150 nucleotides / sec

1050 nucleotides / sec

44 / 100

Category: Biology Ch 5 Class 12

Turner’s syndrome is characterized by having:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Trisomy 21

B) 44 + XXY

C) Trisomy

D) 44 + XO

45 / 100

Category: Biology Ch 4 Class 12

During birth, central nervous system of infants can be damaged by

PMC Sample 3
Biology
Reproduction
Elimination Tool:

A) syphilis

B) genital herpes

C) gonorrhoa

D) HPV

46 / 100

Category: Biology Ch 4 Class 12

Which statement is incorrect?

In short day plants red light prevents flowering

Henbane is a short day plant

In long day plants for red light promotes flowering

Leaf unrolling occurs in grasses

47 / 100

Category: Biology Ch 3 Class 12

Normal resting membrane potential of a neuron is

50 mv

60 mv

70 mv

80 mv

48 / 100

Category: Biology Ch 11 Class 12

All populations within an ecosystem interconnected to one another are known as

Species

Family

Community

Biomes

49 / 100

Category: Biology Ch 8 Class 11

All of the following are characteristics of kingdom fungi except:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Heterotrophy

B) Sessil

C) Cell wall

D) None of the above

50 / 100

Category: Biology Ch 6 Class 12

Chromosomes are composed of

40% protein and 60% DNA

50% protein and 50% DNA

70% protein and 30% DNA

60% protein and 40% DNA

51 / 100

Category: Biology Ch 11 Class 11

Quantitative study of energy relationships in biological systems obeys.

Bioenergetics

Laws of thermodynamics

Laws of thermo chemistry

Laws of chemical energeti

52 / 100

Category: Biology Ch 1 Class 12

In comparison to a constantly changing external environment, _____ is when the body maintains the internal processes to work in a narrow range of internal fluctuations.

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Regulation

B) Homeostasis

C) Balancing

D) Thermoregulation

53 / 100

Category: Biology Ch 7 Class 11

Plasmodium belongs to

Ciliates

Apicomplexans

Actinopods

Foraminferans

54 / 100

Category: Biology Ch 3 Class 11

Cyanide for enzymes act as:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Substrate

C) Cofactor

B) Prosthetic group

D) Inhibitor

55 / 100

Category: Biology

Q.8 Which of the following structure provides greater pathogenicity to the bacteria?

A. slime

B. cell wall

C. cell membrane

D. capsule

56 / 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

57 / 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

58 / 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

59 / 100

Category: Biology Ch 9 Class 11

Antherozoids the male gamete in bryophytes are attracted towards Archegonium i.e. female sex organ by

Phototactic phenomenon

Chemotactic phenomenon

. Geotropic phenomenon

Chemotropic movement

60 / 100

Category: Biology

Q.27 During which of the following levels of biological organization can natural selection occur?

A. Gene

B. Individual

C. Group

D. All of these

61 / 100

Category: Biology

Q.64 Which of the following conditions is not required to be true for a population in Hardy-Veinberg equilibrium?

A. Random mutation

B. Large population

C. No natural selection

D. Random mating

62 / 100

Category: Biology Ch 4 Class 12

In which of the following options is mitotic division involved?

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Oogonium to primary oocyte

B) Primary oocyte to secondary oocyte

C) Secondary oocyte to egg

D) None of the given options

63 / 100

Category: Biology Ch 3 Class 12

Which one of the following is a neurotransmitter?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Dopamine

B) Hydrochloric acid

C) Sodium ions

D) Calcium ions

64 / 100

Category: Biology Ch 9 Class 12

Cloning is a form of:

NUMS 2016
Biology
Biotechnology
Elimination Tool:

A) Parthenogenesis

B) Apomixis

C) Sexual reproduction

D) Asexual reproduction

65 / 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

66 / 100

Category: Biology Ch 3 Class 11

Which step causes activation of catalytic site of an enzyme?

Change in pH of the surroundings.

Formation of Enzyme Susstrate complex.

Change in the charge of the active site.

Change in temperature

67 / 100

Category: Biology Ch 3 Class 12

Which type of the receptors are present in the ear?

Chemoreceptors

Mechanoreceptors

Photoreceptors

Thermoreceptors

68 / 100

Category: Biology

Q.34 What molecule would you not expect to find in a refrovirus

A. Adenine

B. Thymine

C. Uracil

D Guanine

69 / 100

Category: Biology

In semi-conservative replication, which of the following is true regarding the separation of two strands?

NUMS Mock 2
Biology
Chromosomes and DNA

A) Primary structure is conserved, and secondary structure is disturbed

B) Secondary structure is conserved, and the primary structure is disrupted

C) both the primary and secondary structures are conserved

D) Both the primary and secondary structures are disrupted

70 / 100

Category: Biology Ch 7 Class 11

Which of the following is divided by fission?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Viruses

B) Viroids

C) Bacteria

D) Fungus

71 / 100

Category: Biology Ch 12 Class 11

Midgut in cockroach is a short narrow tube called

Hepatic caeca

Gizzard

Stomach

Rectum

72 / 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

73 / 100

Category: Biology Ch 4 Class 12

Pituitary gland releases ______ hormone and _______ hormone while ovaries produce _______ and progesterone.

NTS 2019
Biology
Reproduction
Elimination Tool:

A) Follicle-stimulating and luteinizing, estrogen

B) Estrogen and follicle-stimulating, luteinizing

C) Luteinizing arid estrogen, follicle-stimulating

D) Follicle-stimulating and estrogen, luteinizing

74 / 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

75 / 100

Category: Biology Ch 8 Class 11

Saccharomyces cerevisiae is the scientific name of a:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Fungus

B) Smut

C) Bacterium

D) Yeast

76 / 100

Category: Biology

Q.40 Which of the following is true of both bacterial conjugation and meiosis?

A. Both processes produce four haploid cells

B. Both processes are a form of asexual reproduction

C. Both processes involve genetic recombination

D. None of these

77 / 100

Category: Biology Ch 13 Class 12

In air % of oxygen and carbon dioxide is

Oxygen 20%, CO2 0.03%

Oxygen 50%, CO2 50%

Oxygen 30%, CO2 0.05%

Oxygen 25%, CO2 0.02%

78 / 100

Category: Biology Ch 9 Class 11

Antheridia and archegonia are _____ organs in bryophytes.

NTS 2015 DUHS and JSMU
Biology
Kingdom Plantae
Elimination Tool:

A) Reproductive

B) digestive

C) respiratory

D) none of the above

79 / 100

Category: Biology Ch 10 Class 11

Which of the following phylum and its examples is NOT correct?

NUMS 2017
Biology
Kingdom Animalia
Elimination Tool:

A) Nematoda… Ascaris and hookworm

B) Annelid … Nereis and leech

C) Echinodermata … sea star and brittle star

E) Cnidaria … Euplectell and bath sponge

80 / 100

Category: Biology

Q.27 The stimulus for the production of more gastrin hormone from the gastric endocrine lining is:

A. Protein content of the food

B. Carbohydrate content of the food

C. Lipid content of the food

D. Partially digested food nutrients

81 / 100

Category: Biology Ch 5 Class 11

Amoeba belongs to which kingdom:

Prokaryotae

Plantae

Monera

Protista

82 / 100

Category: Biology

Which one of the following is a fish?

NUMS Mock 3
Biology
Kingdom Animalia

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

83 / 100

Category: Biology Ch 7 Class 12

Mitosis occurs in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

84 / 100

Category: Biology

The Latin words of the name given to a human being, Homo Sapiens, include the:

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

B) Family and order

C) Order and class

D) Genus and class

E) Genus and species

85 / 100

Category: Biology Ch 9 Class 12

Which one has antibiotic resistance gene for tetracycline and ampicillin?

pSC 101

pBR 322

pCR 322

None of these

86 / 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

87 / 100

Category: Biology

Carbon dioxide fixation can be enhanced by enhancing the efficiency of:

NUMS Mock 3
Biology
Bioenergetics

A) Auxins

B) Ribulose bisphosphate

C) Lactoferrin

D) Agrobacterium

88 / 100

Category: Biology Ch 10 Class 11

Leptocardii is a group of:

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Urochordata

B) Cephalochordata

C) Vertebrata

D) Mollusca

89 / 100

Category: Biology Ch 6 Class 11

Which of the following is TRUE about the structure of a typical bacterium?

PMC 2020
Biology
Kingdom Prokaryote
Elimination Tool:

A) It has cell wall

B) It has cytoplasm

C) It has genetic material

D) All of the above

90 / 100

Category: Biology

Q.23 The vectors for disease spread belong to which of the following phylum?

A. Porifera

B. Platyhelminthes

C. Annelida

D. Arthropoda

91 / 100

Category: Biology Ch 13 Class 12

A lullaby is a song. No song is prose. Some proses are epics.

Conclusions:

I. Some proses are songs.

II. Some epics are lullabies.

III. Some songs are lullabies.

Which of the following is most appropriate in the above case?

a) Only II

b) Only III

c) I, II, and III are inappropriate

a

b

c

none

92 / 100

Category: Biology

The light dependent reaction of photosynthesis occurs in:

NUMS Mock 2
Biology
Bioenergetics

A) Stroma of chloroplast

B) Guard cells of stomata

C) Thylakoid membrane of chloroplast

D) Cytoplasm of leaf cell

93 / 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

94 / 100

Category: Biology Ch 9 Class 11

Which one of the following types of cell are found in secondary xylem of angiosperms?

NTS 2015 DUHS and JSMU
Biology
Kingdom Plantae
Elimination Tool:

A) Tracheids parenchyma fibres collenchyma but no vessels

B) Vessels tracheids parenchyma collenchyma but no fibres

C) Vessels tracheids fibres collenchyma but no parenchyma

D) Vessels tracheids fibres parenchyma but no collenchyma

95 / 100

Category: Biology Ch 10 Class 12

The wings of birds and the forelegs of a horse are _____ structures.

NUMS 2016
Biology
Evolution
Elimination Tool:

A) Analogous

B) Homologous

C) Vestigial

D) Evolutionary convergent

96 / 100

Category: Biology Ch 13 Class 12

Greenhouse gases are those that:

NUMS 2015
Biology
Man and His Environment
Elimination Tool:

A) Prevent entry of ultraviolet rays

B) Prevent rainfall

C) Prevent heat to escape

D) All given options are correct

97 / 100

Category: Biology Ch 11 Class 12

Diverse and stable community at the end of succession is

Diverse Climax communityand stable community at the end of succession is A. Climax community B. Pioneers community C. Top community D. Stable community Answer & Explanation Answer: Option A

Pioneers community

Top community

Stable community A

98 / 100

Category: Biology

Why do some vegetables lose water when salt is applied to them?

NUMS Mock 3
Biology
Transport

A) Due to the less negative water potential of the external environment than the cell.

B) Due to the more negative water potential of the external environment that the cell

C) . Due to the less positive water potential of the external environment than the cell

D) Due to more positive water potential of the external environment than the cell

99 / 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

100 / 100

Category: Biology Ch 9 Class 12

Some transgenic bacteria produce a dipeptide sweetener called

Ultrasweet

Disweet

Monosweet

Neutrasweet

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