Biomolecules Chapter-Wise Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which disaccharide is known as milk sugar?

Lactose, composed of glucose and galactose, is commonly referred to as milk sugar.

Sucrose
Lactose
Maltose
Fructose
2

Which vitamin is essential for the hydroxylation of proline in collagen?

Vitamin C is required for the enzyme prolyl hydroxylase to hydroxylate proline, stabilizing collagen.

Vitamin A
Vitamin D
Vitamin K
Vitamin C
4

Which bond type is disrupted by urea in protein denaturation?

Urea disrupts hydrogen bonds in proteins, destabilizing secondary and tertiary structures.

Peptide bond
Hydrogen bond
Disulfide bond
Ionic bond
2

What is the total number of hydroxyl groups in the open chain form of ribose?

Ribose, a pentose, has four -OH groups in its open chain form (at C2, C3, C4, and C5), as C1 is part of the aldehyde group.

3
5
4
6
3

Which biomolecule serves as the genetic material in humans?

DNA (deoxyribonucleic acid) is the primary genetic material in humans, storing hereditary information.

DNA
RNA
Protein
Carbohydrate
1

Which hormone increases blood glucose levels?

Glucagon raises blood glucose levels by promoting glycogenolysis and gluconeogenesis in the liver.

Insulin
Thyroxine
Glucagon
Cortisol
3

Which vitamin is critical for the synthesis of coenzyme A?

Vitamin B₅ (Pantothenic acid) is a key component of coenzyme A, essential for acyl transfer reactions.

Vitamin B₁
Vitamin B₅
Vitamin B₆
Vitamin B₁₂
3

Which monosaccharide is a pentose found in RNA?

Ribose, a five-carbon sugar (pentose), is the sugar component of RNA nucleotides.

Glucose
Fructose
Deoxyribose
Ribose
4

Which monosaccharide yields a tetraacetate when treated with acetic anhydride?

Ribose, a pentose with four -OH groups, forms a tetraacetate when reacted with acetic anhydride.

Glucose
Ribose
Fructose
Galactose
2

Which enzyme is a protein that speeds up hydrolysis of lactose?

Lactase, a protein enzyme, catalyzes the hydrolysis of lactose into glucose and galactose.

Lactase
Sucrase
Maltase
Invertase
1

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