Question 1

Building blocks of proteins

Accepted Answer

Amino acids

Answer

Nucleotides

Answer

Monosaccharides

Answer

Fatty acids

Question 2

Bond linking amino acids in proteins

Accepted Answer

Peptide bond

Answer

Phosphodiester bond

Answer

Glycosidic bond

Answer

Hydrogen bond

Question 3

Main storage carbohydrate in animals

Accepted Answer

Glycogen

Answer

Cellulose

Answer

Starch

Answer

Maltose

Question 4

Type of lipid forming cell membranes

Accepted Answer

Phospholipid

Answer

Triglyceride

Answer

Cholesterol

Answer

Waxes

Question 5

Basic unit of nucleic acids

Accepted Answer

Nucleotide

Answer

Nitrogen base

Answer

Purine

Answer

Nucleoside

Question 6

Sugar component of RNA

Accepted Answer

Ribose

Answer

Fructose

Answer

Deoxyribose

Answer

Galactose

Question 7

Major plasma protein responsible for oncotic pressure

Accepted Answer

Albumin

Answer

Globulin

Answer

Hemoglobin

Answer

Fibrinogen

Question 8

Essential amino acid initiating protein synthesis

Accepted Answer

Methionine

Answer

Lysine

Answer

Leucine

Answer

Valine

Question 9

Functional group pair forming peptide bond

Accepted Answer

Amino and carboxyl groups

Answer

Carbonyl and phosphate

Answer

Sulfhydryl and hydroxyl

Answer

Hydroxyl and amine

Question 10

Structural protein in hair and nails

Accepted Answer

Keratin

Answer

Actin

Answer

Collagen

Answer

Elastin

Question 11

Enzyme component that is protein in nature

Accepted Answer

Apoenzyme

Answer

Holoenzyme

Answer

Cofactor

Answer

Substrate

Question 12

Non-protein substance required for enzyme activity

Accepted Answer

Cofactor

Answer

Catalyst

Answer

Substrate

Answer

Product

Question 13

Organic cofactor derived from vitamins

Accepted Answer

Coenzyme

Answer

Allosteric modulator

Answer

Prosthetic group

Answer

Apoenzyme

Question 14

Enzyme converting hydrogen peroxide to water and oxygen

Accepted Answer

Catalase

Answer

Peroxidase

Answer

Oxidase

Answer

Reductase

Question 15

Effect of temperature on enzyme activity is due to

Accepted Answer

Denaturation of enzyme

Answer

Competitive binding

Answer

Change in pH

Answer

Allosteric inhibition

Question 16

Reaction catalyzed by oxidoreductases

Accepted Answer

Oxidation–reduction

Answer

Hydrolysis

Answer

Ligation

Answer

Isomerization

Question 17

Type of enzyme inhibition reversed by excess substrate

Accepted Answer

Competitive inhibition

Answer

Non-competitive inhibition

Answer

Allosteric inhibition

Answer

Irreversible inhibition

Question 18

Enzyme kinetics showing sigmoidal curve

Accepted Answer

Allosteric enzyme

Answer

Catalase

Answer

Isoenzyme

Answer

Michaelis–Menten enzyme

Question 19

Site where substrate binds on enzyme

Accepted Answer

Active site

Answer

Denaturation site

Answer

Regulatory site

Answer

Allosteric site

Question 20

First enzyme of glycolysis

Accepted Answer

Hexokinase

Answer

Enolase

Answer

Phosphofructokinase

Answer

Pyruvate kinase

Question 21

End product of anaerobic glycolysis

Accepted Answer

Lactic acid

Answer

Pyruvic acid

Answer

Citric acid

Answer

Acetyl-CoA

Question 22

Main site of gluconeogenesis

Accepted Answer

Liver

Answer

RBCs

Answer

Brain

Answer

Muscle

Question 23

Rate-limiting enzyme of TCA cycle

Accepted Answer

Isocitrate dehydrogenase

Answer

Citrate synthase

Answer

Succinyl-CoA synthetase

Answer

Malate dehydrogenase

Question 24

Electron carriers in oxidative phosphorylation

Accepted Answer

NADH and FADH₂

Answer

ATP and ADP

Answer

CoA and CoQ

Answer

AMP and GTP

Question 25

Hormone promoting glycogenolysis

Accepted Answer

Epinephrine

Answer

Thyroxine

Answer

Cortisol

Answer

Insulin

Question 26

Molecule linking carbohydrate and lipid metabolism

Accepted Answer

Acetyl-CoA

Answer

Pyruvate

Answer

Citrate

Answer

Oxaloacetate

Question 27

Major site of β-oxidation

Accepted Answer

Mitochondria

Answer

Peroxisome

Answer

Cytoplasm

Answer

Lysosome

Question 28

Lipoprotein transporting cholesterol to liver

Accepted Answer

HDL

Answer

VLDL

Answer

Chylomicron

Answer

LDL

Question 29

Enzyme inhibited by statins

Accepted Answer

HMG-CoA reductase

Answer

Acetyl-CoA carboxylase

Answer

ATP synthase

Answer

Lipase

Question 30

Precursor of prostaglandins and leukotrienes

Accepted Answer

Arachidonic acid

Answer

Linoleic acid

Answer

Oleic acid

Answer

Stearic acid

Question 31

Storage form of fats in adipose tissue

Accepted Answer

Triglycerides

Answer

Free fatty acids

Answer

Phospholipids

Answer

Cholesterol esters

Question 32

Ketone body not used by liver

Accepted Answer

Acetoacetate

Answer

Acetone

Answer

Propionate

Answer

β-hydroxybutyrate

Question 33

Disorder from defect in sphingolipid degradation

Accepted Answer

Tay-Sachs disease

Answer

Niemann-Pick disease

Answer

Fabry disease

Answer

Gaucher disease

Question 34

Removal of amino group from amino acid

Accepted Answer

Deamination

Answer

Decarboxylation

Answer

Transamination

Answer

Oxidation

Question 35

Cycle converting ammonia to urea

Accepted Answer

Urea cycle

Answer

Krebs cycle

Answer

Cori cycle

Answer

Calvin cycle

Question 36

Amino acid precursor of dopamine

Accepted Answer

Tyrosine

Answer

Tryptophan

Answer

Glutamate

Answer

Phenylalanine

Question 37

Vitamin coenzyme for transamination

Accepted Answer

Pyridoxal phosphate (B6)

Answer

Folic acid

Answer

Thiamine

Answer

Biotin

Question 38

Disorder due to lack of phenylalanine hydroxylase

Accepted Answer

Phenylketonuria

Answer

Homocystinuria

Answer

Maple syrup urine disease

Answer

Alkaptonuria

Question 39

End product of purine degradation

Accepted Answer

Uric acid

Answer

Ammonia

Answer

Creatinine

Answer

Urea

Question 40

Genetic defect in branched-chain amino acid metabolism

Accepted Answer

Maple syrup urine disease

Answer

Cystinuria

Answer

Albinism

Answer

Hartnup disease

Question 41

Base pairing rule A-, G-

Accepted Answer

T, C

Answer

U, G

Answer

U, C

Answer

T, G

Question 42

Enzyme responsible for DNA replication

Accepted Answer

DNA polymerase

Answer

Helicase

Answer

RNA polymerase

Answer

Ligase

Question 43

Process of RNA synthesis from DNA

Accepted Answer

Transcription

Answer

Translation

Answer

Replication

Answer

Splicing

Question 44

Codon signaling start of translation

Accepted Answer

AUG

Answer

UGA

Answer

UAG

Answer

UAA

Question 45

Drug inhibiting bacterial folate synthesis

Accepted Answer

Sulfonamides

Answer

Penicillin

Answer

Tetracycline

Answer

Erythromycin

Question 46

Mutation replacing one amino acid with another

Accepted Answer

Missense mutation

Answer

Frameshift mutation

Answer

Silent mutation

Answer

Nonsense mutation

Question 47

Technique that amplifies DNA

Accepted Answer

PCR

Answer

Western blot

Answer

Electrophoresis

Answer

ELISA

Question 48

Type of RNA carrying amino acids

Accepted Answer

tRNA

Answer

mRNA

Answer

snRNA

Answer

rRNA

Question 49

Drug interfering with thymidylate synthesis

Accepted Answer

5-Fluorouracil

Answer

Cyclophosphamide

Answer

Methotrexate

Answer

Vincristine

Question 50

Vitamin forming coenzyme NAD⁺

Accepted Answer

Niacin (B3)

Answer

Riboflavin

Answer

Pantothenic acid

Answer

Thiamine

Question 51

Vitamin forming FAD coenzyme

Accepted Answer

Riboflavin (B2)

Answer

Thiamine

Answer

Niacin

Answer

Biotin

Question 52

Vitamin acting as antioxidant

Accepted Answer

Vitamin E

Answer

Vitamin D

Answer

Vitamin A

Answer

Vitamin K

Question 53

Vitamin responsible for collagen synthesis

Accepted Answer

Vitamin C

Answer

Vitamin D

Answer

Vitamin B12

Answer

Vitamin B6

Question 54

Vitamin acting as coenzyme for carboxylation

Accepted Answer

Biotin (B7)

Answer

Niacin

Answer

Folate

Answer

Thiamine

Question 55

Vitamin deficiency causing megaloblastic anemia

Accepted Answer

Vitamin B12

Answer

Vitamin B1

Answer

Vitamin C

Answer

Vitamin K

Question 56

Vitamin deficiency causing rickets

Accepted Answer

Vitamin D

Answer

Vitamin A

Answer

Vitamin K

Answer

Vitamin E

Question 57

Vitamin deficiency causing scurvy

Accepted Answer

Vitamin C

Answer

Vitamin B6

Answer

Vitamin B12

Answer

Vitamin B1

Question 58

Vitamin deficiency causing pellagra

Accepted Answer

Niacin (B3)

Answer

Pyridoxine

Answer

Thiamine

Answer

Riboflavin

Question 59

Vitamin deficiency causing beriberi

Accepted Answer

Thiamine (B1)

Answer

Niacin

Answer

Folic acid

Answer

Riboflavin

Question 60

Vitamin deficiency causing cheilosis

Accepted Answer

Riboflavin (B2)

Answer

Vitamin A

Answer

Vitamin D

Answer

Vitamin K

Question 61

Peptide hormone lowering blood glucose

Accepted Answer

Insulin

Answer

Glucagon

Answer

Epinephrine

Answer

Cortisol

Question 62

Hormone increasing blood glucose during fasting

Accepted Answer

Glucagon

Answer

Insulin

Answer

Aldosterone

Answer

Thyroxine

Question 63

Thyroid hormone derived from tyrosine

Accepted Answer

Thyroxine (T4)

Answer

Triiodothyronine (T3)

Answer

Aldosterone

Answer

Calcitonin

Question 64

Hormone derived from cholesterol

Accepted Answer

Steroid hormone

Answer

Peptide hormone

Answer

Protein hormone

Answer

Amino acid hormone

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