Biomolecules Chapter-Wise Test 19

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which disaccharide is fermented by yeast to produce alcohol?

Maltose, a reducing sugar with two glucose units, is fermented by yeast to produce ethanol and CO₂.

Sucrose
Maltose
Lactose
Fructose
2

Which monosaccharide is an epimer of glucose?

Galactose is an epimer of glucose, differing only at the C4 position in their open chain forms.

Fructose
Galactose
Ribose
Mannose
2

Which biomolecule is denatured by heavy metal ions like Hg²⁺?

Proteins are denatured by heavy metal ions, which disrupt disulfide bonds and other interactions in their structure.

Protein
Carbohydrate
Nucleic acid
Vitamin
1

Which vitamin deficiency causes macrocytic anemia?

Vitamin B₁₂ deficiency leads to macrocytic anemia due to impaired DNA synthesis in red blood cell production.

Vitamin B₆
Vitamin B₁₂
Vitamin B₃
Vitamin C
2

Which vitamin is essential for preventing scurvy?

Scurvy is caused by a deficiency of vitamin C (ascorbic acid), which is crucial for collagen synthesis.

Vitamin C
Vitamin A
Vitamin D
Vitamin K
1

How many -OH groups are present in the open chain structure of glucose?

The open chain structure of glucose has five -OH groups attached to different carbon atoms, confirmed by its reaction with acetic anhydride to form a pentaacetate.

3
4
6
5
4

Which vitamin acts as an antioxidant?

Vitamin E (tocopherol) acts as an antioxidant, protecting cell membranes from oxidative damage.

Vitamin A
Vitamin B₁
Vitamin C
Vitamin E
4

Which monosaccharide is a component of DNA?

Deoxyribose is the five-carbon sugar in DNA nucleotides, lacking an -OH group at C2.

Glucose
Fructose
Deoxyribose
Ribose
3

Which of the following is an aldohexose?

Glucose is an aldohexose, a six-carbon sugar with an aldehyde group at C1.

Fructose
Ribose
Galactose
Glucose
4

Which vitamin deficiency disrupts carboxylation reactions?

Vitamin H (Biotin) deficiency impairs carboxylation reactions, as it’s a coenzyme for carboxylases.

Vitamin B₁
Vitamin B₆
Vitamin C
Vitamin H
4

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