Biology Practice Test 3

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 3

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

1 / 100

Category: Biology

Q.28 The vocal cords are stretched across:

A. Larynx

B. Glottis

C. Pharynx

D. Trachea

2 / 100

Category: Biology

Q.41 Corpus luteum is yellow glandular mass and is important source of:

A. Estrogen

B. FSH

C. Testosterone

D. Progesterone

3 / 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

4 / 100

Category: Biology

Q.31 Due to short distance between lungs and heart, walls of right ventricle are:

A. Thicker than left ventricle

B. Thicker than right atrium

C. Thinner than right atrium

D. Thinner than left ventricle

5 / 100

Category: Biology

As an excretory organ, liver:

NUMS Mock 3
Biology
Homeostasis

A) Detoxifies many chemical poisons

B) Produces ammonia for excretion by the kidneys

C) Produces urea and uric acids from the nitrogen of amino acids

D) All of the above

6 / 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

7 / 100

Category: Biology Ch 6 Class 12

Who discovered DNA?

P.A.Levene

Frederick Griffith

Friedrich Miescher

Rosalind Franklin

8 / 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

9 / 100

Category: Biology Ch 1 Class 11

Group of living organisms of the same species living in the same place at the same time is called

Community

Ecosystem

Biome

10 / 100

Category: Biology Ch 1 Class 12

In animals excess of nitrogen is excreted primarily in form of

Creatinine

Trimethyamine oxide

Pyrimidine

Ammonia

11 / 100

Category: Biology Ch 9 Class 11

The zygote formed in liverworts is

Unicellular

Mulicellular

Multinucleate

None of these

12 / 100

Category: Biology

Q.66 Which of the following provides the strong evidence in support of evolution:

A. Fossil record

B. Comparative embryology

C. Comparative anatomy

D. Molecular biology

13 / 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

14 / 100

Category: Biology Ch 9 Class 12

DNA analysis is done to

Diagnose viral infections

Identify criminals

Determine evolution

All of these

15 / 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

16 / 100

Category: Biology Ch 10 Class 11

Species of phylum Platyhelminthes are:

NTS 2011
Biology
Kingdom Animalia
Elimination Tool:

A) Roundworms

B) Flat worms

C) Hook worms

D) Thread worms

17 / 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

18 / 100

Category: Biology

Q.22 What are T Cells and their rolelin IHV infection?

A. A type lymphocytes

B. Present in blood and work as detence systein

C.They kill the ioreign invader

D. All of these

19 / 100

Category: Biology Ch 7 Class 11

Radiolarians belong to which of the following protozoal group?

Zooflagellates

Actinopods

Foraminifera

Apicomplexans

20 / 100

Category: Biology Ch 3 Class 11

The following statements are about enzymes:

1. They are globular proteins

2. They can be inhibited by competitive inhibitors

3. They are formed in the smooth endoplasmic reticulum

4. There are only found attached to Plasma membranes in the cell

Which statements are correct for all enzymes?

NTS 2015 DUHS and JSMU
Biology
Enzymes
Elimination Tool:

A) 1 and 4

B) 2 and 4

C) 1 and 2

D) 1,2,3 and 4

21 / 100

Category: Biology Ch 8 Class 11

Ecological role of fungi as decomposers is only paralleled by

Blue green algae

Cyanobacteria

Bacteria

Virus

22 / 100

Category: Biology Ch 10 Class 11

Which vertebrate groups have scaly skin?

NTS 2013
Biology
Kingdom Animalia
Elimination Tool:

A) amphibians and fish

B) amphibians and mammals

C) fish and mammals

D) fish and reptiles

23 / 100

Category: Biology Ch 12 Class 11

All of the insectivorous plants are true

Heterotrophs

Autotrophes

Carnivores

Saprotrophs

24 / 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

25 / 100

Category: Biology Ch 7 Class 12

_______ is the stage of mitosis characterized by the physical separation of ________ chromatids.

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Interphase. Offspring

B) Telophase, F1 chromatids

C) Metaphase, Homologous

D) Anaphase. Sister

26 / 100

Category: Biology Ch 2 Class 11

A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called:

Lipid

Carbohydrate

Protein

Carotein

27 / 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

28 / 100

Category: Biology Ch 11 Class 11

Lactic Acid Fermentation is a type of anaerobic respiration that occurs in human muscle cells. It yields only ____ % of the energy present in a glucose molecule.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) 5

B) 7

C) 10

D) 20

29 / 100

Category: Biology

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

NUMS Mock 2
Biology
Homeostasis

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

30 / 100

Category: Biology

The ability of an individual to pass on its phenotype to future generations is known as:

NUMS Mock 1
Biology
Variation and Genetics

A) Fitness

B) Heritability

C) Limited environmental resources

D) Overproduction of offspring

31 / 100

Category: Biology Ch 6 Class 11

Which of the following is not a sterilization method for the control of bacteria?

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Radiation

C) High temperature

B) Filtration

D) Antiseptic

32 / 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

33 / 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

34 / 100

Category: Biology Ch 7 Class 12

From each pair of centrioles ________ sets of microtubules originate

2

3

4

5

35 / 100

Category: Biology Ch 11 Class 11

Net yield of H2O in Photosynthesis is

1 molecule

6 molecules

3 molecules

0 molecule

36 / 100

Category: Biology

The table shows the characteristics of the blood in one blood vessel in the body.

Which blood vessel contains blood with these characteristics?

NUMS Mock 1
Biology
Transport

A) Aorta

B) Pulmonary artery

C) Pulmonary vein

D) Vena cava

37 / 100

Category: Biology

Q.2 Competitive inhibition can be overcome by using

A. Low concentration of substrate

B. High concentration of inhibitor

C. Moderate concentration of inhibitor

D. High concentration of substrate

38 / 100

Category: Biology Ch 4 Class 12

The primary oocyte in mammals has which of the following structures around it:

NUMS 2014
Biology
Reproduction
Elimination Tool:

A) Zona Pellucida

B) Zona Vasculosa

C) Zona radiata

D) None of them

39 / 100

Category: Biology Ch 4 Class 11

Who opposed the idea the cell is an empty space bounded by thick wall?

Lorenz Oken

Schwann

Robert Brown

Rudolph Virchow

40 / 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

41 / 100

Category: Biology Ch 1 Class 12

Humans maintain their body temperature within a narrow limit due to their _____ characteristics.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Ectothermic

B) Endothermic

C) Heterothermic

D) Hypothermic

42 / 100

Category: Biology

Q.53 Which of these is the best treatment for osteoarthritis?

A. Bed rest

B. Exercise

C. Cast

D. None of these

43 / 100

Category: Biology Ch 13 Class 12

Endangered species are

Dangerous for the life of humans

Reduced in number

Already extinct

All of these

44 / 100

Category: Biology Ch 2 Class 12

Movement of the Hip joint is which type of synovial joints?

NUMS 2018
Biology
Support and Movement
Elimination Tool:

A) Gliding joint

B) Ball and socket joint

D) Hinge joint

C) Pivot joints

45 / 100

Category: Biology Ch 9 Class 12

The technique use of identification of criminals is called:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Cloning

B) DNA fingerprinting

C) Restriction Analysis

D) Polymorphism

46 / 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

47 / 100

Category: Biology

Q.15 The inhibitory effect of which inhibitor can be more dangerous in Krebs cycle?

A. Irreversible inhibitors

B. Competitive inhibitor

C. Reversible inhibitors

D. Non-competitive inhibitor

48 / 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

49 / 100

Category: Biology Ch 8 Class 12

A trait whose alleles are present in both males and females but prominent more in one sex than other is a:

NUMS 2016
Biology
Variation and Genetics
Elimination Tool:

A) Sex-linked trait

B) Sex limited trait

C) Sex influenced trait

D) X-linked trait

50 / 100

Category: Biology Ch 12 Class 11

Fundography is relevant to:

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Heart

C) Stomach

B) Liver

D) Eyes

51 / 100

Category: Biology Ch 2 Class 12

Which of the following animal has a hydrostatic skeleton:

Earthworm

Round worm

Tape worm.

Pin worm

52 / 100

Category: Biology Ch 8 Class 11

Tetracycline and penicillins are:

NUMS 2018
Biology
Kingdom Fungi
Elimination Tool:

A) Disinfectants

B) Antibiotics

C) Antiseptics

D) Antigens

53 / 100

Category: Biology Ch 5 Class 11

Vaccine Was discovered by :

Louis Pasteur

Edward Jennar

Ivanowski

Stanely

54 / 100

Category: Biology Ch 3 Class 11

Optimal temperature of enzymes present in human body is

27?C

37?C

47?C

30?C

55 / 100

Category: Biology

Among the following, which cellular organelle contains circular DNA, similar to those found in bacteria?

NUMS Mock 1
Biology
Cell Structure and Function

A) Lysosome

B) Nucleus

C) Nucleosome

D) Mitochondria

56 / 100

Category: Biology Ch 6 Class 11

Coccobacillus has a shape similar to

Diplobacillus

Sarcina

Egg

None of these

57 / 100

Category: Biology Ch 2 Class 12

Endoskeleton is secreted by:

Ectoderm

Endoderm

Mesoderm

All of these

58 / 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

59 / 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

60 / 100

Category: Biology

The diagram represents two liquids, separated by a membrane through which osmosis can occur.

What movement of molecules will occur?

NUMS Mock 3
Biology
Transport

A) Molecules of dissolved substance move from left to right.

B) Molecules of dissolved substance move from right to left.

C) Overall, water molecules move from left to right.

D) Overall, water molecules move from right to left.

61 / 100

Category: Biology Ch 3 Class 11

A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product/s and thus blocks the active site temporarily or permanently is called

Co-enzyme

Blocker

Inhibitor

Cofactor

62 / 100

Category: Biology Ch 8 Class 12

A child with AB blood group who was born to a mother of the genotype IAIA cannot have the father of the genotype:

NUMS 2014
Biology
Variation and Genetics
Elimination Tool:

A) IA IA

B) IB IB

C) IB IO

D) IB IB and IB IO

63 / 100

Category: Biology Ch 7 Class 11

Which of the following statement is incorrect about algae?

Their zygote unlike plants is protected by parental tissue.

Their classification is based on pigment composition.

Most of them have different morphological forms in-different stages of their life cycle.

Almost all of them are aquatic.

64 / 100

Category: Biology Ch 9 Class 12

The enzyme which seals the foreign DNA into the vector is

Restriction endonuclease

DNA polymerase

DNA ligase

DNA mutase

65 / 100

Category: Biology

Q.26 Most carbon dioxide is transported in the form of:

A. Carboxyhemoglobin

B. Lipids

C. Bicarbonate ions

D. Chemicals

66 / 100

Category: Biology

A group of biologically active molecules formed from amino acids which interact with the surface of the lipid bilayer of cell membranes are called:

NUMS Mock 3
Biology
Biological Molecules

A) Integral Proteins

B) Peripheral proteins

C) Cell wall

D) Plasmodesmata

67 / 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

68 / 100

Category: Biology

Q.39 Which of the following genetic diseases is caused by mutations in a membrane protein?

A. Alzheimer's disease

B. Parkinson's disease

C. Anemia

D. Hemolytic anemia

69 / 100

Category: Biology Ch 4 Class 12

The human cells affected in HIV are which of the following?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) RBCs

B) WBCs

C) Platelets

D) stem cells

70 / 100

Category: Biology Ch 13 Class 12

Process that supplies food to living things through decaying and decomposition is called

. Food cycle

Nutrient cycle

Dead-live cycle

None of these

71 / 100

Category: Biology

Which of the following statements are true for mitochondria and chloroplasts?

A. ATP synthesis is seen in both
B. Outer membrane has more surface area in both
C. Circular naked DNA, RNA, and 70 ribosomes are seen in both
D. Oxidative phosphorylation occurs in both

NUMS Mock 4
Biology
Cell Structure and Function

A) A and B

B) B and C

C) A and C

D) A and D

72 / 100

Category: Biology

Q.54 Which of the following elements are not found in carbohydrates?

A.C

B.H

C.N

D. O

73 / 100

Category: Biology Ch 2 Class 11

Which of the following has the ability to develop ester linkage with OH group of Pentose sugar?

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) Purine

B) Pyrimidine

C) H3PO4

D) HNO3

74 / 100

Category: Biology Ch 5 Class 11

Numerous opportunist diseases might attack people suffering from the following diseases?

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

A) Measles

B) Influenza

C) Hepatitis A

D) AIDS

75 / 100

Category: Biology Ch 10 Class 12

Which condition can be explained by Lamarckism?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) How giraffes got their long neck

B) How humans lost their tail

C) How humans became bipedal

D) all of these

76 / 100

Category: Biology Ch 12 Class 11

Puccinia commonly destroys

Corn

Tomato

Dodder

Wheat

77 / 100

Category: Biology

Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a(n):

NUMS Mock 1
Biology
Enzymes

A) Holoenzyme

B) Apoenzyme

C) Coenzyme

D) Zymoenzyme

78 / 100

Category: Biology Ch 8 Class 11

How many species of fungi are known till now

10000

100000

10000000

1000

79 / 100

Category: Biology Ch 4 Class 11

Autophagosomes are

Those lysosomes which eat parts of their own cells to generate energy.

Those lysosomes which eat old and worn out cellular organelles.

Lysosomes which help in extracellular digestion

Both a and b

80 / 100

Category: Biology Ch 8 Class 12

Which of the following X – linked recessive trait that is more common in human males than in human females?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) Hemophilia

B) Sickle cell Anemia

C) Color Blindness

D) Hypophosphatemic rickets

81 / 100

Category: Biology Ch 7 Class 11

Which of the following statement about eiliates in incorrect?

Contain mainly unicellular organisms.

Their contractile vacoule is respobsible for water regulation.

They are even capable of sexual reproduction.

Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in sexual process.

82 / 100

Category: Biology Ch 3 Class 11

The number of substrate molecules converted into the product by one molecule of enzyme active site per unit time is called?

PMC Practice 2
Biology
Enzymes
Elimination Tool:

A) Turnover number

B) Substrate number

C) Reaction number

D) None of these options is correct

83 / 100

Category: Biology Ch 5 Class 12

Speed of growth is

Rapid throughout

Slow throughout

First slow then rapid then slow again

First rapid then slow

84 / 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

85 / 100

Category: Biology Ch 7 Class 12

Which of the following cells does not enter G0 phase?

NUMS 2020
Biology
Cell Cycle
Elimination Tool:

A) Nerve cells

B) Cells of cornea

C) Cells of lens

D) None of these

86 / 100

Category: Biology Ch 5 Class 12

A plant has a growth pattern called

Closed growth

Open growth

In between the two

87 / 100

Category: Biology Ch 8 Class 12

Which of the following characters of pea plant is dominant?

Axial flowers

Yellow pods

White flowers

Wrinkled seeds

88 / 100

Category: Biology

Q.14 Aschelminthes is also known as which of the following?

A. Protozoans

B. Eumetazoa

C. Protoctist ancestors

D. Nematodes

89 / 100

Category: Biology

Which vertebrae together are called pelvic vertebrae?

NUMS Mock 2
Biology
Support and Movement

A) Coccygeal and lumbar

B) Sacral and lumbar

C) Sacral and coccygeal

D) Sacral and thoracic

90 / 100

Category: Biology Ch 8 Class 11

Coenocytic hyphae are also known as

Septate

. Perforated hyphae

Aseptate

Uninucleate hyphae

91 / 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’

92 / 100

Category: Biology Ch 13 Class 11

The blood enters the _____ side of heart

Posterior

All possibl

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 11

The gametophyte of Ulva is:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Haploid

B) Diploid

C) Triploid

D) Polyploidy

95 / 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

96 / 100

Category: Biology Ch 5 Class 12

Germ layers are formed in which stage of development?

NUMS 2020
Biology
Growth and Development
Elimination Tool:

A) Morulation

B) Blastulation

C) Gastrulation

D) Organogenesis

97 / 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%

98 / 100

Category: Biology Ch 5 Class 12

Amniotic fluid in human embryo protects it from:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Degeneration

C) Encasement

B) Jerks

D) None of these

99 / 100

Category: Biology Ch 7 Class 12

Microtubule subunits (for spindle fibers) are synthesized in _______ phase.

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) G1

B) M

C) G2

D) S

100 / 100

Category: Biology

Q.47 The chemical nature of oxytocin is:

A. Protein

B. Amino acid derivative

C. Polypeptide

D. Steroid Incorrect

Your score is

The average score is 59%

0%

PLS Academy – LearnoSpot

PLS Boost Bundle