MERIT YARD

[Biomolecules - Most Important MCQs - MERIT YARD]

Question 1 / 40Which of the following is the most abundant protein in the whole of the biosphere?

A) Collagen

B) RuBisCO

C) Insulin

D) Haemoglobin

Question 2 / 40Amino acids are substituted _______.

A) Ethane

B) Methane

C) Propane

D) Butane

Question 3 / 40Which bond is formed between two amino acids in a protein chain?

A) Glycosidic bond

B) Phosphodiester bond

C) Peptide bond

D) Hydrogen bond

Question 4 / 40The most abundant component of a living cell is:

A) Protein

B) Water

C) Nucleic acid

D) Carbohydrate

Question 5 / 40Which of the following is a polysaccharide?

A) Cellulose

B) Glucose

C) Sucrose

D) Fructose

Question 6 / 40In Nucleic acids, the nitrogenous base is linked to the pentose sugar by:

A) Peptide bond

B) N-Glycosidic bond

C) Phosphodiester bond

D) Disulfide bond

Question 7 / 40Which of the following is a non-reducing sugar?

A) Glucose

B) Sucrose

C) Lactose

D) Maltose

Question 8 / 40Enzymes increase the rate of reaction by:

A) Increasing activation energy

B) Lowering activation energy

C) Increasing temperature

D) Changing pH

Question 9 / 40Lecithin is a type of:

A) Simple lipid

B) Phospholipid

C) Steroid

D) Protein

Question 10 / 40The energy currency of the cell is:

A) DNA

B) RNA

C) ATP

D) NADP

Question 11 / 40Which of the following is a secondary metabolite?

A) Glucose

B) Morphine

C) Amino acid

D) ATP

Question 12 / 40A nucleotide consists of:

A) Sugar + Base

B) Sugar + Base + Phosphate

C) Base + Phosphate

D) Sugar + Phosphate

Question 13 / 40Which of the following is a sulfur-containing amino acid?

A) Glycine

B) Methionine

C) Alanine

D) Valine

Question 14 / 40In DNA, Adenine pairs with Thymine with how many hydrogen bonds?

A) One

B) Two

C) Three

D) Four

Question 15 / 40The 'alpha-helix' structure of protein is a:

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quaternary structure

Question 16 / 40Which of the following is an essential fatty acid?

A) Palmitic acid

B) Linoleic acid

C) Stearic acid

D) Oleic acid

Question 17 / 40Competitive inhibitor of succinate dehydrogenase is:

A) Citrate

B) Malonate

C) Fumarate

D) Malate

Question 18 / 40The non-protein part of a holoenzyme is called:

A) Apoenzyme

B) Cofactor

C) Isoenzyme

D) Proenzyme

Question 19 / 40Chitin is a polymer of:

A) Glucose

B) N-acetyl glucosamine

C) Fructose

D) Amino acids

Question 20 / 40Glycogen is a homopolymer made up of:

A) Glucose

B) Fructose

C) Galactose

D) Ribose

Question 21 / 40Prosthetic groups are different from co-factors in that:

A) They are tightly bound to the apoenzyme

B) They are loosely bound

C) They are always inorganic

D) They are not required for activity

Question 22 / 40Zwitterion property is shown by:

A) Carbohydrates

B) Amino acids

C) Lipids

D) Nucleotides

Question 23 / 40Which of the following is a basic amino acid?

A) Glutamic acid

B) Lysine

C) Valine

D) Tyrosine

Question 24 / 40Glycerol is:

A) Monohydroxy propane

B) Dihydroxy propane

C) Trihydroxy propane

D) Tetrahydroxy propane

Question 25 / 40Bond between sugar and phosphate in DNA is:

A) Peptide bond

B) Phosphodiester bond

C) Glycosidic bond

D) Hydrogen bond

Question 26 / 40Example of an alkaloid is:

A) Codeine

B) Ricin

C) Cellulose

D) Curcumin

Question 27 / 40A β-pleated sheet is an example of:

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quaternary structure

Question 28 / 40The building blocks of proteins are:

A) Fatty acids

B) Amino acids

C) Monosaccharides

D) Nucleotides

Question 29 / 40Inulin is a polymer of:

A) Glucose

B) Fructose

C) Galactose

D) Amino acids

Question 30 / 40Zinc is a cofactor for which enzyme?

A) Peroxidase

B) Carboxypeptidase

C) Catalase

D) Dehydrogenase

Question 31 / 40Which of the following is not a macromolecule?

A) Protein

B) Polysaccharide

C) Lipid (due to low mol weight)

D) Nucleic acid

Question 32 / 40Number of carbons in Arachidonic acid including carboxyl carbon:

A) 16

B) 18

C) 20

D) 22

Question 33 / 40The most abundant element in the human body is:

A) Carbon

B) Nitrogen

C) Oxygen

D) Hydrogen

Question 34 / 40Secondary metabolite Ricin is a:

A) Alkaloid

B) Toxin

C) Drug

D) Lectin

Question 35 / 40Starch gives blue color with iodine because:

A) It forms a helical structure that holds I2

B) It is a polymer

C) It reacts chemically

D) It is white

Question 36 / 40Primary structure of a protein is held by:

A) Peptide bond

B) Hydrogen bond

C) Ionic bond

D) Hydrophobic bond

Question 37 / 40Which of the following is a prosthetic group?

A) Haem

B) NAD

C) NADP

D) Zinc

Question 38 / 40Adult human haemoglobin consists of:

A) 2 subunits

B) 4 subunits

C) 6 subunits

D) 1 subunit

Question 39 / 40Cytidine is a:

A) Nucleotide

B) Nucleoside

C) Nitrogen base

D) Fatty acid

Question 40 / 40Enzymes that catalyze removal of groups by mechanisms other than hydrolysis:

A) Hydrolases

B) Lyases

C) Ligases

D) Isomerases