Biomolecules Chapter-Wise Test 4

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which vitamin deficiency leads to dermatitis as a symptom?

Vitamin B₃ (Niacin) deficiency causes pellagra, which includes dermatitis among its symptoms.

Vitamin B₁
Vitamin B₂
Vitamin B₃
Vitamin B₁₂
3

Which biomolecule forms the structural framework of connective tissues?

Collagen, a fibrous protein, provides strength and structure to connective tissues like tendons and ligaments.

Collagen
Hemoglobin
Insulin
RNA
1

Which protein forms the structural framework of skin?

Keratin, a fibrous protein, provides strength and protection to skin, hair, and nails.

Hemoglobin
Insulin
Keratin
Myosin
3

Which vitamin is synthesized in the skin upon exposure to sunlight?

Vitamin D is synthesized in the skin from 7-dehydrocholesterol upon exposure to UV light.

Vitamin A
Vitamin C
Vitamin K
Vitamin D
4

Which type of bond links nucleotides in a nucleic acid?

Nucleotides in DNA and RNA are linked by phosphodiester bonds between the sugar and phosphate groups.

Phosphodiester bond
Peptide bond
Glycosidic bond
Hydrogen bond
1

How many hydrogen bonds are formed between guanine and cytosine in DNA?

Guanine and cytosine form three hydrogen bonds in DNA, contributing to the stability of the double helix.

2
4
3
1
3

Which vitamin deficiency causes night blindness?

Vitamin A is essential for vision, and its deficiency leads to night blindness.

Vitamin B₁
Vitamin C
Vitamin D
Vitamin A
4

Which of the following is a non-essential amino acid?

Non-essential amino acids can be synthesized by the body. Serine is one such amino acid.

Leucine
Lysine
Serine
Threonine
3

How many carbon atoms are present in ribose?

Ribose is a pentose sugar, meaning it has five carbon atoms in its structure.

4
6
5
3
3

Which vitamin is involved in the synthesis of visual pigments?

Vitamin A (retinol) is essential for forming rhodopsin, a visual pigment in the retina.

Vitamin A
Vitamin B₂
Vitamin C
Vitamin D
1

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