Biology Practice Test 1

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 1

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1 / 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

2 / 100

Category: Biology

Q.64 According to the induced fit model. What happens when an enzyme-substrate omplex is formed?

A. The contact between the substrate and the enzyme causes a change in the shape of the active site

B. The shape of the substrate and the shape of the active site are complementary to each other.

C. The substrate fits into active site and forms bonds with the amino acids at the active site.

D. All of the above.

3 / 100

Category: Biology Ch 7 Class 12

Synaptonemal complex helps in:

NUMS 2014
Biology
Cell Cycle
Elimination Tool:

Bac

A) Gamete formation

B) Recombination during cell division

C) Production of enzymes during cell division

D) Chromosomal movement towards pole

4 / 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

5 / 100

Category: Biology

Q.52 The patellar reflex and the Achilles reflex are examples of:

A. Monosynaptic reflex

B. Polysynaptic reflex

C. Hemi Synaptic reflex

D. Both A and B

6 / 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

7 / 100

Category: Biology

Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Ribosomes

B) Cytoplasm

C) Golgi apparatus

D) Endoplasmic reticulum

8 / 100

Category: Biology Ch 2 Class 11

The disease caused by nutritional deficiency is:

NTS 2018
Biology
Biological Molecules
Elimination Tool:

A) Hepatitis

B) Cholera

C) Malaria

D) Beriberi

9 / 100

Category: Biology Ch 3 Class 12

Normal action potential of a neuronal cell is :

plus 50 mv

plus 60 mv

plus 70 mv

plus 80 mv

10 / 100

Category: Biology Ch 8 Class 12

Which statement about dominant and recessive alleles is not correct?

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) A dominant characteristic is seen in the phenotype of a heterozygote.

B) A homozygous genotype may be either dominant or recessive.

C) Recessive phenotypes always have two recessive alleles.

D) The phenotype of a homozygote is always dominant.

11 / 100

Category: Biology Ch 3 Class 11

The active site of an enzyme:

Never changes

Forms no chemical bond with substrate

Determined by structure and the specificity of the enzyme.

They are non specific in their action.

12 / 100

Category: Biology Ch 7 Class 12

Condensation of chromosomes reaches to the maximum during:

NUMS 2015
Biology
Cell Cycle
Elimination Tool:

A) Zygote

B) Pachytene

D) Diakinesis

C) Diplotene

13 / 100

Category: Biology Ch 4 Class 12

Female rabbits are:

NUMS 2014
Biology
Reproduction
Elimination Tool:

A) induced ovulators

B) spontaneous ovulators

C) seasonal ovulators

D) indifferent ovulators

14 / 100

Category: Biology Ch 3 Class 12

Cell membrane under resting conditions is impermeable to all the ions except

Na+

. K+

Cl-

PO4-2

15 / 100

Category: Biology

Q.68 Enzymes are globular proteins because

A. They have a primary structure.

B. They have a secondary structure.

C They have a tertiary structure,

D. All of the above.

16 / 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

17 / 100

Category: Biology Ch 8 Class 12

Erythroblastosis foetalis occurs when:

NTS 2011
Biology
Variation and Genetics
Elimination Tool:

D) Both mother and baby are Rh-positive

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

18 / 100

Category: Biology Ch 9 Class 12

Tobacco plants, resistant to a nematode, have been developed by the introduction of DNA that produces (in the host cells):

PMC Practice 11
Biology
Biotechnology
Elimination Tool:

A) Both sense and antisense RNA

B) A particular hormone

C) An antifeedant

D) A toxic protein

19 / 100

Category: Biology Ch 6 Class 12

DNA contains

Purines (A and G) pyrimidines (U and (c)

Purines (T and (c) pyrimidines (A and G)

Purines (A and (c) pyrimidines (U and G)

Purines (A and G) pyrimidines (T and (c)

20 / 100

Category: Biology Ch 4 Class 12

Treponema pallidum causes:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Syphilis

B) Gonorrhoea

C) AIDS

D) Herpes

21 / 100

Category: Biology Ch 5 Class 12

Vegetative roots and shoots grow by

Determinate growth

Primary growth only

Indeterminate growth

None of these

22 / 100

Category: Biology Ch 3 Class 11

The enzyme found in saliva responsible for the digestion of carbohydrates is:

NTS 2018
Biology
Enzymes
Elimination Tool:

A) Lysozyme

B) Amylase

C) Pepsin

D) Trypsinogen

23 / 100

Category: Biology Ch 9 Class 11

In bryophytes fertilization takes place in

Antheridia

Archegonia

water

Ovule

24 / 100

Category: Biology Ch 8 Class 12

The law of dominance is illustrated in the garden pea by:

NTS 2010
Biology
Variation and Genetics
Elimination Tool:

B) Heterozygous tall x heterozygous tall

C) Homozygous tall x homozygous tall

D) Pure short x pure short

E) Homozygous tall x pure short

25 / 100

Category: Biology Ch 6 Class 12

Which is incorrect?

Chromosomes 1st observed by walther Fleming

Chromosomal theory of inheritance 1st formulated by Walter Sutton

1st evidence of hereditary nature of DNA provided by Friedrich Meischer

. Sex chromosomes discovered by Thomas Hunt Morgan

26 / 100

Category: Biology

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

NUMS Mock 3
Biology
Evolution

A) Analogous

B) Homologous

C) Vestigial

D) Evolutionary convergent

27 / 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

28 / 100

Category: Biology Ch 12 Class 11

The structure which prevents the entry of food particles into the respiratory passage is:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Hard palate

B) Epiglottis

C) Soft palate

D) Larynx

29 / 100

Category: Biology Ch 7 Class 11

Cysts are not resistant to ______ but spores are:

NUMS 2020
Biology
Kingdom Protista
Elimination Tool:

A) Light

B) Desiccation

C) pH

D) Heat

30 / 100

Category: Biology Ch 6 Class 11

In which phase of bacterial growth, does divison at an exponential rate occur?

NUMS 2020
Biology
Kingdom Prokaryote
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Decline phase

31 / 100

Category: Biology Ch 2 Class 11

The melting point of unsaturated fatty acids:

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) Increases with increase in double bonds

B) Decreases with increase in double bonds

C) Rises in some and falls in others

D) There is no relationship between unsaturation and melting point

32 / 100

Category: Biology Ch 13 Class 12

Hydroelectricity is generated by using ______ of falling water.

Potential energy

Gravitational energy

Kinetic energy

. All of these

33 / 100

Category: Biology Ch 3 Class 11

Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called

Cofactor

Coenzymes

Activator

Enzymes

34 / 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

35 / 100

Category: Biology

In human gut, chylomicrons are formed by the combination of:

NUMS Mock 1
Biology
Nutrition

A) Proteins and carbohydrates

B) Fats and proteins

C) Fats and carbohydrates

D) Vitamins and fats

36 / 100

Category: Biology

Q.58 Acording to the law of independent assortment, what is the possible number of combinations that chromosomes can assort to independently in the gamete?

A. 16,777,216

B. 2,048

C. 4,194,304

D. 8.388.608

37 / 100

Category: Biology

When both the alleles of a gene pair are same, the organism is said to be:

NUMS Mock 3
Biology
Variation and Genetics

A) Heterozygous

B) Genotype

C) Homozygous

D) Phenotype

38 / 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.

39 / 100

Category: Biology Ch 1 Class 11

Sythetic insulin from pork was formed by which technique:

Parasitology

Social biological techniques

Both a and c

40 / 100

Category: Biology

Q.20 Cytochromes are electron transport intermediates containing?

A. myoglobin

B. heam

C. globulin

D. fibrin

41 / 100

Category: Biology Ch 5 Class 12

Cells of fibers and tracheids elongate during

Phase of cell division

Phase of cell elongation

Phase of cell maturation

Phase of cell differentiation

42 / 100

Category: Biology Ch 4 Class 12

Which of the following hormones of the pituitary gland regulates the menstrual cycle?

PMC 2020
Biology
Reproduction
Elimination Tool:

A) Follicle Stimulating hormone and Estrogen

B) Luteinizing hormone and Estrogen

C) Follicle Stimulating hormone and Luteinizing hormone

D) Estrogen and Progesterone

43 / 100

Category: Biology Ch 8 Class 12

Which traits are most likely to affect men than women?

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) X linked recessive

B) X linked dominant

C) Autosomal dominant

D) Autosomal recessive

44 / 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

45 / 100

Category: Biology Ch 5 Class 11

A combination of alpha interferon and ribavirin is used for the treatment of hepatitis:

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

A) B

B) A

C) D

D) C

46 / 100

Category: Biology Ch 9 Class 12

Deficiency of enzyme ______ causes combined immunodeficiency syndrome.

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Adenosine transcriptase

B) Adenosine transaminase

C) Adenosine polymerase

D) Adenosine deaminase

47 / 100

Category: Biology Ch 10 Class 11

Scales are present in:

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Fishes

B) Reptiles

C) Birds

E) A and B

48 / 100

Category: Biology

Q.20 Of the following, which one is not the characteristic of kingdom animalia:

A. All animals are ingestive heterotrophs

B. All animals are diploid

C. All animals are eukaryotes

D. All animals are developed from dissimilar haploid gametes e.g. larger sperm and small egg

49 / 100

Category: Biology Ch 10 Class 12

What is in q2 Hardy Weinberg equilibrium?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Frequency of the dominant allele

B) Frequency of the recessive allele

C) Frequency of both alleles

D) Number of both alleles

50 / 100

Category: Biology Ch 1 Class 12

As an excretory organ, liver:

PMC 2020
Biology
Homeostasis
Elimination Tool:

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

51 / 100

Category: Biology Ch 12 Class 12

Desert ecosystem of Mianwali is

Thar

Thal

Cholistan

None

52 / 100

Category: Biology Ch 10 Class 12

Adaptations that an organism acquires by its own actions are

Heritable

Not heritable

Can be made heritable through some modifications

Both heritable and not heritable

53 / 100

Category: Biology Ch 10 Class 12

Carolus Linnaeus was believer of

Special creation

Natural selection

Catastrophism

. Inheritance of acquired characters

54 / 100

Category: Biology

Q.46 Which part of the brain connects the cerebrum with the spinal cord?

A. Forebrain

B. Cerebrum

C. Cerebellum

D. Brainstem

55 / 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’

56 / 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

57 / 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

58 / 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

59 / 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

60 / 100

Category: Biology Ch 12 Class 11

The process of swallowing is controlled by:

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Hypothalamus

B) Hormones

C) Medulla oblongata

D) Sympathetic nervous system

61 / 100

Category: Biology Ch 4 Class 12

Luteinizing hormone, which is produced by the pituitary gland, promotes ovulation and stimulate the ovaries to produce:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Estrogen and progesterone

C) Progesterone

D) Oxytocin

62 / 100

Category: Biology Ch 5 Class 11

The social organization of howling monkeys was studied by:

NUMS 2014
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Allen

B) Thorpe

C) Schjeldeup ebbe

D) Carpenter

63 / 100

Category: Biology Ch 5 Class 11

Solanum tuberosum is a scientific name of:

Onion

Amaltas

Potato

Tomato

64 / 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

65 / 100

Category: Biology Ch 5 Class 12

Germ cells give rise to:

NTS 2012
Biology
Growth and Development
Elimination Tool:

A) Legs

B) Head

C) Eggs and sperms

D) Hands

66 / 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

67 / 100

Category: Biology Ch 4 Class 12

Menstrual cycle can be divided into:

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Single phase

B) Two phases

C) Three phases

D) Four phases

68 / 100

Category: Biology Ch 12 Class 12

In polluted lake which organisms dominate the community

Fish

Crustaceans

Phytoplanktons

Blue green algae

69 / 100

Category: Biology Ch 5 Class 12

The fate of each blastomere is foretold. What will that cleavage be?

PMC Sample 2
Biology
Growth and Development
Elimination Tool:

A) Spiral and indeterminate

B) Radial and determinate

C) Radial and indeterminate

D) Spiral and determinate

70 / 100

Category: Biology Ch 8 Class 11

Unicellular fungi which is non-hyphal is

Mushroom

Yeast

Penicillium

Mold

71 / 100

Category: Biology Ch 8 Class 12

Read the passage below to answer the question:

Hemophilia is a disorder in which blood fails to clot. Saad, a male hemophiliac, marries Sara, a normal woman and together they have four children, two boys (Ahmed and Ali) and two girls (Alia and Ayesha). None of the children display the symptoms of Hemophilia. Ahmed, Ali, Ayesha, and Ali all marry normal individuals and have children. None of Ahmeds or Ali’s children, male or female, display symptoms of hemophilia, but the sons of Alia and Ayesha display symptoms of hemophilia while the daughters of Alia and Ayesha do not.

Which of the following individuals are heterozygous for hemophilia:

NTS 2010
Biology
Variation and Genetics
Elimination Tool:

A) Saad, Ahmed, and Ali

B) Ahmed, Ali, Alia, and Ayesha

C) Saad and Sara

D) Alia and Ayesha

72 / 100

Category: Biology Ch 6 Class 12

The genotype of a normal male in humans is ______ chromosomes.

NTS 2012
Biology
Chromosomes and DNA
Elimination Tool:

A) 44 + XX

B) 44 + XY

C) 44 + XXY

D) 44 + XO

73 / 100

Category: Biology Ch 6 Class 11

The DNA of the bacterium is present in a distinct region called:

NUMS 2017
Biology
Kingdom Prokaryote
Elimination Tool:

A) Nucleolus

B) Centrosome

C) Nucleoid

D) Nucleus

74 / 100

Category: Biology Ch 3 Class 11

If another molecule, having a shape very similar to the enzymes substrate, binds to its active site, it would then ____ the enzyme’s function:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Fasten

B) Inhibit

C) Reverse

D) Decrease

75 / 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

76 / 100

Category: Biology Ch 4 Class 12

In cloning, nucleus is introduced into

Somatic cell

Egg cell

Sperm cell

None of thes

77 / 100

Category: Biology Ch 3 Class 11

Malonic acid is an example of:

Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Non-competitive inhibitor

78 / 100

Category: Biology

The finger like infoldings, which are formed by inner membrane of mitochondria, are called:

NUMS Mock 2
Biology
Cell Structure and Function

A) Ribosomes

B) Matrix

C) Porin

D) Cristae

79 / 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

80 / 100

Category: Biology Ch 7 Class 12

Synthesis of microtubules increases in:

UHS 2018
Biology
Cell Cycle
Elimination Tool:

A) M phase

B) S phase

C) G1 phase

D) G2 phase

81 / 100

Category: Biology Ch 1 Class 12

In humans, the temperature regulation control center is located in:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Kidneys

B) Brain

C) Lungs

D) Liver

82 / 100

Category: Biology Ch 10 Class 12

Most fossils are found in the

Metamorphic rocks

Soil

Sedimentary rocks

Volcanic mountains

83 / 100

Category: Biology Ch 2 Class 11

NAD is an example of:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Mononucleotide

B) Dinucleotide

C) Trinucleotide

D) Tetranucleotide

84 / 100

Category: Biology Ch 2 Class 12

Joints found at the vertebrates are:

NTS 2014
Biology
Support and Movement
Elimination Tool:

A) gliding joints

C) partially moveable joints

B) sliding joints

D) fixed joints

85 / 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

86 / 100

Category: Biology

Q.10 Mating between relatives is called which of the following?

A. Ex breeding

B. Breeding

C. Inbreeding

D. Outbreeding

87 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

88 / 100

Category: Biology Ch 7 Class 11

Radiolarians belong to which of the following protozoal group?

Zooflagellates

Actinopods

Foraminifera

Apicomplexans

89 / 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

90 / 100

Category: Biology Ch 11 Class 12

Mosses are

Dermatocarpon

Permellia

Tortula

Both b and c

91 / 100

Category: Biology Ch 9 Class 12

The genetically Engineered vaccine is not available for which of the following?

PMC Practice 8
Biology
Biotechnology
Elimination Tool:

A) HAV

B) HBV

C) HCV

D) HDV

92 / 100

Category: Biology

Q.30 The structure of which bacteriophages resembles a tadpole?

A. T2

B. T4

C. Both A and B

D. None

93 / 100

Category: Biology Ch 8 Class 11

How many species of fungi are known till now

10000

100000

10000000

1000

94 / 100

Category: Biology Ch 11 Class 11

Which of the following is a chemical link between catabolism and anabolism?

AMP

ADP

ATP

All of these

95 / 100

Category: Biology Ch 6 Class 11

Tuberculosis is caused by?

NTS 2015 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

A) Bacterium

B) Allergy

C) Nicotine

D) Virus

96 / 100

Category: Biology Ch 5 Class 12

Sertoli cells

Provide liquid medium to cells in testes

Provide protection and nourishment to cells

Secrete testosterone

Both a and b

97 / 100

Category: Biology

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

A. Adenine

B. Thymine

C. Uracil

D Guanine

98 / 100

Category: Biology Ch 1 Class 12

Among the followings which is the most longest supportive cell?

Tracheids

Sclereids

Trachea

Collenchyma cells

99 / 100

Category: Biology Ch 7 Class 11

Trypanosoma belongs to class:

NTS 2011
Biology
Kingdom Protista
Elimination Tool:

A) Sarcodina

B) Flagellata

C) Ciliata

D) Suctoria

100 / 100

Category: Biology Ch 6 Class 12

Diameter of DNA double helix is:

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

A) 3.4 nm

B) 0.3 nm

D) 0.2 nm

C) 2 nm

Your score is

The average score is 52%

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