Biochemistry MCQs

Option A: 5

Option B: 3

Option C: 11

Option D: 2

Correct Answer: 5 ✔

Option A: Nyctalopia

Option B: Xerophthalmia

Option C: Bitot’s spot

Option D: Keratomalacia

Correct Answer: Nyctalopia ✔

Option A: Cyclic AMP

Option B: Adenosine tri phosphate

Option C: Citrate

Option D: Fructose 2,6 bis phosphate

Correct Answer: Fructose 2,6 bis phosphate ✔

Option A: Phosphatase

Option B: Aldolase

Option C: Dismutase

Option D: ATPase

Correct Answer: ATPase ✔

Option A: Cofactor

Option B: Coenzyme

Option C: Apoenzyme

Option D: Holoenzyme

Correct Answer: Cofactor ✔

Option A: Activate the substrate

Option B: Increase the active sites of apoenzyme

Option C: Enhance the specificity of apoenzyme

Option D: Accept one of the cleavage products

Correct Answer: Accept one of the cleavage products ✔

Option A: Glucose 6 phosphate dehydrogenase

Option B: Glucose 6 phosphatase

Option C: Hexokinase

Option D: Glucose 1,6 diphosphatase

Correct Answer: Glucose 6 phosphate dehydrogenase ✔

Option A: Nucleus

Option B: Mitochondria

Option C: Ribosomes

Option D: Non-particulate cytoplasm

Correct Answer: Mitochondria ✔

Option A: Hypothyroidism

Option B: Carcinoma of prostate

Option C: Hyperparathyroidism

Option D: Myocardial infarction

Correct Answer: Hyperparathyroidism ✔

Option A: Cytochromes

Option B: Cytochrome P 450

Option C: Super oxide dismutase

Option D: Catalase

Correct Answer: Catalase ✔

Option A: Oxidases

Option B: Peptidases

Option C: Transferases

Option D: LIpases

Correct Answer: Transferases ✔

Option A: Lecithin cholesterol acyl transferase (LCAT)

Option B: Pyrophospho mevalonate decarboxylase

Option C: HMG CoA reductase

Option D: Phospho mevalonate kinase

Correct Answer: Lecithin cholesterol acyl transferase (LCAT) ✔

Option A: Action on substrate

Option B: Action of coenzymes

Option C: Nature of the enzymes

Option D: All of the above

Correct Answer: Action on substrate ✔

Option A: MM fraction

Option B: MB fraction

Option C: BB fraction

Option D: Both MM and BB fraction

Correct Answer: MB fraction ✔

Option A: A solvent

Option B: A base

Option C: A catalyst

Option D: Thermoplastic

Correct Answer: A catalyst ✔

Option A: Dissociation constant

Option B: The normal physiological substrate concentration

Option C: Substrate concentration at half maximal velocity

Option D: Numerically identical for all isozymes that catalyses a given reaction

Correct Answer: Substrate concentration at half maximal velocity ✔

Option A: HMG-Co A synthase

Option B: Malic enzyme

Option C: Malonyl CoA synthetase

Option D: Fatty acid synthetase

Correct Answer: Malic enzyme ✔

Option A: Glutamate oxaloacetate transaminase

Option B: Glutamate pyruvate transaminase

Option C: Alkaline phosphaase

Option D: Acid phosphatase

Correct Answer: Alkaline phosphaase ✔

Option A: Deficiency of glutamic acid

Option B: Deficiency of oxaloacetic acid

Option C: Liver disease

Option D: All of the above

Correct Answer: Liver disease ✔

Option A: Phosphoglutamase

Option B: Branching enzyme

Option C: Debranching enzyme

Option D: Glucose-6-phosphotase

Correct Answer: Glucose-6-phosphotase ✔

Option A: Rate of enzymatic reaction is independent of substrate concentration

Option B: Rate of non enzymatic reaction is proportional to substrate concentration

Option C: Km is the enzyme substrate complex association constant

Option D: Enzyme- substrate complex formation is essential in enzymatic reaction

Correct Answer: Enzyme- substrate complex formation is essential in enzymatic reaction ✔

Option A: Acetyl co enzyme A

Option B: Biotin

Option C: THF4

Option D: Pyridoxine

Correct Answer: THF4 ✔

1. Transferase
2. Reductase
3. Oxidoreductase
4. Oxidase

Correct Answer: 1. Transferase ✔

Option A: Apoenzyme

Option B: Proenzyme

Option C: Protoenzyme

Option D: Holoenzyme

Correct Answer: Holoenzyme ✔

Option A: Glutamine

Option B: Glutamic acid

Option C: Glycine

Option D: Lysine

Correct Answer: Glycine ✔

Option A: Intracellular proteolysis

Option B: Electron transport chain

Option C: Transport of ATP

Option D: Protein folding

Correct Answer: Intracellular proteolysis ✔

Option A: Modification of proteins

Option B: m RNA synthesis

Option C: Protein storage

Option D: t RNA synthesis

Correct Answer: Modification of proteins ✔

Option A: Globulin

Option B: Albumin

Option C: Collagen

Option D: Hemoglobin

Correct Answer: Collagen ✔

Option A: Glucose

Option B: Gructose

Option C: Maltose

Option D: Dextrin

Correct Answer: Maltose ✔

Option A: Mitochondria

Option B: Poly ribosomes

Option C: Nucleus

Option D: Golgi bodies

Correct Answer: Poly ribosomes ✔

Option A: Haemoglobin

Option B: Myoglobin

Option C: Gall bladder

Option D: A & B

Correct Answer: A & B ✔

Option A: Cholic acid

Option B: Chenodeoxycholic acid

Option C: Deoxycholic acid

Option D: Lithocholic acid

Correct Answer: All of the above ✔

Option A: Dopamine hydroxylase

Option B: Dopa decarboxylase

Option C: O-methylation

Option D: N-methylation

Correct Answer: N-methylation ✔

Option A: Tyrosine to dopa

Option B: Phenylalanine to tyrosine

Option C: Dopa to dopamine

Option D: Dopamine to nor epinephrine

Correct Answer: Tyrosine to dopa ✔

Option A: Insulin

Option B: Glucagon

Option C: GH

Option D: Androgen

Correct Answer: Glucagon ✔

Option A: Parathyroid hormone

Option B: Thyroxine

Option C: Triidothyronine

Option D: Serotonin

Correct Answer: Parathyroid hormone ✔

Option A: Endoplasmic reticulum

Option B: Mitochondria

Option C: Nucleolus

Option D: Plasma membrane

Correct Answer: Endoplasmic reticulum ✔

Option A: Protein lipid synthesis

Option B: Protein synthesis

Option C: Sorting of glycoproteins

Option D: None of the above

Correct Answer: Sorting of glycoproteins ✔

Option A: Mitochondrion

Option B: Golgi body

Option C: Endoplasmic reticulum

Option D: Centriole

Correct Answer: Mitochondrion ✔

Option A: Hyperventilation

Option B: Increased NH3 excretion by kidneys

Option C: Increased urinary phosphates

Option D: Increased HCO3 Production

Correct Answer: Increased NH3 excretion by kidneys ✔

Option A: 20 : 1

Option B: 30 : 1

Option C: 15 : 1

Option D: 1 : 1

Correct Answer: 20 : 1 ✔

Option A: 6.8 – 7.0

Option B: 7.0 – 7.12

Option C: 7.38 – 7.4

Option D: 7.7 – 8.0

Correct Answer: C. 7.38 – 7.4 ✔

Option A: Lipid moiety is amphipathic

Option B: Rigid assembly of protein, lipid and carbohydrate

Option C: Symmertrical bi leaflet structures

Option D: Lipid and protein moiety are held by covalent interactions

Correct Answer: Lipid moiety is amphipathic ✔

Option A: Structural proteins

Option B: Substrate protiens

Option C: Pigment

Option D: Polymer

Correct Answer: Pigment ✔

Option A: Metabolic acidosis

Option B: Smell of acetone in breath

Option C: Benedict’s test +ve

Option D: Rothera’s test is +ve

Correct Answer: C. Benedict’s test +ve ✔

Option A: Flavoprotein

Option B: Cytochrome Cl

Option C: Ubiquinone

Option D: Cytochrome A

Correct Answer: Ubiquinone ✔

Option A: Oxidase

Option B: Hydrolase

Option C: Peroxidase

Option D: Dehydrogenase

Correct Answer: Oxidase ✔

Option A: Mitochondria

Option B: Rough endoplasmic reticulum

Option C: Golgi apparatus

Option D: Lysomes

Correct Answer: Lysomes ✔

Option A: Liver

Option B: Kidney

Option C: Skeletal muscle

Option D: Cardiac muscle

Correct Answer: Skeletal muscle ✔

Option A: Endoplasmic reticulum

Option B: Ribosome

Option C: Golgi body

Option D: Glycogen

Correct Answer: Glycogen ✔

Option A: Cholesterol

Option B: Aminoacids

Option C: Bilirubin

Option D: Lipoproteins

Correct Answer: Cholesterol ✔

Option A: 0.5 – 1 mg%

Option B: 1 – 3 mg%

Option C: 3 – 4 mg%

Option D: 4 – 5.5 mg%

Correct Answer: A. 0.5 – 1 mg% ✔

Option A: Phenyl alanine

Option B: Tyrosine

Option C: Tryptophan

Option D: None of the above

Correct Answer: Tyrosine ✔

Option A: Epinephrine

Option B: Tyrosine

Option C: Dopamine

Option D: Phenylalanine

Correct Answer: Dopamine ✔

Option A: Aldosterone

Option B: Methyl testosterone

Option C: Estrogen

Option D: Pregnenolone

Correct Answer: Pregnenolone ✔

Option A: c AMP

Option B: c GMP

Option C: Phosphatidyl inosital

Option D: Phosphatidyl glycerol

Correct Answer: Phosphatidyl glycerol ✔

Option A: 20% proteins, 25% fats, 50% carbohydrates

Option B: 20% proteins, 35% fats, 45% carbohydrates

Option C: 25% proteins, 25% fats, 50% carbohydrates

Option D: 35% proteins, 15% fats, 50% carbohydrates

Correct Answer: 20% proteins, 25% fats, 50% carbohydrates ✔

Option A: Nucleus

Option B: Nucleolus

Option C: Golgi apparatus

Option D: Ribsomes

Correct Answer: Nucleus ✔

Option A: Lipids and proteins

Option B: Lipids only

Option C: Protein only

Option D: None of the above

Correct Answer: Lipids and proteins ✔

Option A: Protein synthesis

Option B: Oxidation

Option C: Electron transfer

Option D: Fat synthesis

Correct Answer: Electron transfer ✔

Option A: Na+

Option B: K+

Option C: Cl

Option D: Proteins

Correct Answer: Na+ ✔

Option A: O2 Hb +Na hemoglobinate

Option B: O2Hb +K hemoglobinate

Option C: H2CO3 + KHCO3

Option D: H2CO3 +NAHCO3

Correct Answer: H2CO3 +NAHCO3 ✔

Option A: Hydrogen bonding

Option B: Hydrophobic interactions

Option C: Vander wall forces

Option D: Not known

Correct Answer: Hydrophobic interactions ✔

Option A: Oxidation

Option B: Reduction

Option C: Conjugation

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: Cytochrome

Option B: Cytochrome P450

Option C: Cytochrome C

Option D: Cytochrome A

Correct Answer: Cytochrome ✔

Option A: Oleic, linoleic and linolenic acid

Option B: Arachidonic, linolenic and linoleic acid

Option C: Palmitic Oleic and arachidonic

Option D: Linoleic, arachidonic and stearic acid

Correct Answer: Arachidonic, linolenic and linoleic acid ✔

Option A: Chylomicron

Option B: VLDL (Very low density lipoprotein)

Option C: LDL (Low density lipoprotein)

Option D: HDL (High density lipoprotein)

Correct Answer: LDL (Low density lipoprotein) ✔

Option A: 40%

Option B: 30%

Option C: 50%

Option D: 75%

Correct Answer: 30% ✔

Option A: 100-140 mgs/100 ml

Option B: 260-360 mgs/100 ml

Option C: 150-250 mgs/100 ml

Option D: 80-250 mgs/100 ml

Correct Answer: 150-250 mgs/100 ml ✔

Option A: Sphingomyelin

Option B: Lecithin

Option C: Cerebroside

Option D: Cephalin

Correct Answer: Cerebroside ✔

Option A: Oleic acid

Option B: Arachitlonic acid

Option C: Linolenic acid

Option D: Palmitic acid

Correct Answer: Oleic acid ✔

Option A: Fructose

Option B: Sucrose

Option C: Galactose

Option D: None of the above

Correct Answer: Galactose ✔

Option A: Triglycerides

Option B: FFA

Option C: Lipoprotein

Option D: Cholesterol

Correct Answer: Triglycerides ✔

Option A: Aceto acetyl CoA

Option B: Malonyl CoA

Option C: Propionyl CoA

Option D: Fumaryl CoA

Correct Answer: Propionyl CoA ✔

Option A: Creatine

Option B: Creatinine

Option C: Carnitine

Option D: Coenzyme A

Correct Answer: Carnitine ✔

Option A: Acetyl-CoA

Option B: Glucose

Option C: Glycerol

Option D: Acetone

Correct Answer: Acetyl-CoA ✔

Option A: Carbohydrate

Option B: Protein

Option C: Fat

Option D: All of the above

Correct Answer: Fat ✔

Option A: Acetoacetic acid and pyruvic acid

Option B: Acetoacetic acid and oxalocacetic acid

Option C: Acetoacetic acid and alpha ketoglutaric acid

Option D: Acetoacetic acid and beta hydroxyl butyric acid

Correct Answer: Acetoacetic acid and beta hydroxyl butyric acid ✔

Option A: HMG CoA synthetase

Option B: HMG CoA lyase

Option C: HMG CoA reductase

Option D: Mevalonate synthetase

Correct Answer: HMG CoA reductase ✔

Option A: Pyruvate

Option B: Cholesterol

Option C: Mevalonate

Option D: Acetyl CoA

Correct Answer: Pyruvate ✔

Option A: Amino acids

Option B: Fatty acids

Option C: Cholesterol

Option D: None of the above

Correct Answer: Cholesterol ✔

Option A: LDL

Option B: VLDL

Option C: HDL

Option D: Chylomicrons

Correct Answer: HDL ✔

Option A: HDL

Option B: VLDL

Option C: LDL

Option D: Chylomicrons

Correct Answer: LDL ✔

Option A: Lipo oxygenase inhibition

Option B: Cyclo-oxygenase inhibition

Option C: Reductase

Option D: Peroxidase

Correct Answer: Cyclo-oxygenase inhibition ✔

Option A: Growth hormone

Option B: Insulin

Option C: Cortisol

Option D: Gulcagon

Correct Answer: Insulin ✔

Option A: 1 mg%

Option B: 5 mg%

Option C: 12 mg%

Option D: 20 mg%

Correct Answer: 1 mg% ✔

Option A: Coconut oil

Option B: Egg yolk

Option C: Hydrogenated fat

Option D: Ghee (unsaturated)

Correct Answer: Egg yolk ✔

Option A: Increasing acetyl-CoA corboxylase activity

Option B: Increases the transport of glucose in to the cells

Option C: Inhibits Pyruvate dehydrogenase

Option D: Decreases intracellular cAMP level

Correct Answer: Inhibits Pyruvate dehydrogenase ✔

Option A: Mitochondria

Option B: Nucleus

Option C: Cytosol

Option D: None of the above

Correct Answer: Cytosol ✔

Option A: Fasting state

Option B: Resting state

Option C: Active state

Option D: All of the above

Correct Answer: Fasting state ✔

Option A: Pyridoxin

Option B: Niacin

Option C: Thiamine

Option D: Retinotic acid

Correct Answer: Thiamine ✔

Option A: Transport cholesterol from liver to peripheral tissues

Option B: Esterification with PUFA

Option C: Both of the above

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Carbohydrate

Option B: Lipid

Option C: Amino acids

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Glycolysis

Option B: Kreb’s cycle

Option C: Urea cycle

Option D: Pentose phosphate pathway

Correct Answer: Pentose phosphate pathway ✔

Option A: has a high caloric value

Option B: Provides essential fatty acid

Option C: aids in absorption of carbohydrates

Option D: is necessary for storage of carbohydrates

Correct Answer: Provides essential fatty acid ✔

Option A: Glucose

Option B: Cholesterol

Option C: Ketone bodies

Option D: Fat

Correct Answer: Glucose ✔

Option A: VLDL

Option B: Chylomicrons

Option C: HDL

Option D: LDL

Correct Answer: Chylomicrons ✔

Option A: Succinyl CoA

Option B: Propionyl CoA

Option C: Acetyl CoA

Option D: Malonyl CoA

Correct Answer: Propionyl CoA ✔

Option A: Short acting

Option B: Present in many tissues

Option C: Some require C-AMP for their action

Option D: All are true

Correct Answer: All are true ✔

Option A: Chylomicrons

Option B: LDL

Option C: VLDL

Option D: HDL

Correct Answer: LDL ✔