Biomolecules Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which amino acid contains an indole ring in its side chain?

Tryptophan has an indole ring (a benzene ring fused to a pyrrole ring) in its side chain, making it aromatic.

Tyrosine
Phenylalanine
Histidine
Tryptophan
4

Which vitamin acts as a coenzyme in carboxylation reactions?

Vitamin H (Biotin) functions as a coenzyme in carboxylation reactions, aiding in the transfer of carboxyl groups.

Vitamin H
Vitamin B₁
Vitamin C
Vitamin D
1

Which biomolecule acts as a coenzyme in metabolic reactions?

Vitamins, such as B vitamins, often function as coenzymes or their precursors in metabolic pathways.

Vitamin
Carbohydrate
Protein
Nucleic acid
1

Which monosaccharide is a pentose with a missing -OH group at C2?

Deoxyribose, found in DNA, is a pentose lacking an -OH group at C2, unlike ribose.

Glucose
Fructose
Ribose
Deoxyribose
4

The glycosidic linkage in maltose is between which carbon atoms?

Maltose consists of two glucose units linked by a glycosidic bond from C1 of one glucose to C4 of the other.

C1 and C4
C1 and C2
C2 and C4
C1 and C6
1

Which disaccharide is hydrolyzed to produce fructose?

Sucrose, upon hydrolysis, yields glucose and fructose, catalyzed by invertase or acid.

Sucrose
Maltose
Lactose
Galactose
1

Which of the following is a component of nucleic acids?

Nucleic acids (DNA and RNA) are composed of nucleotides, each containing a nitrogenous base like adenine.

Adenine
Glucose
Valine
Fatty acid
1

Which vitamin prevents oxidative damage to cell membranes?

Vitamin E (tocopherol), a fat-soluble antioxidant, protects cell membranes by neutralizing free radicals.

Vitamin E
Vitamin B₆
Vitamin K
Vitamin B₁₂
1

Which biomolecule acts as a catalyst in biological reactions?

Enzymes, which are proteins, act as biological catalysts, speeding up reactions without being consumed.

Enzyme
Carbohydrate
Nucleic acid
Vitamin
1

Which base is found in RNA but not in DNA?

Uracil is present in RNA, replacing thymine, which is exclusive to DNA.

Thymine
Uracil
Adenine
Guanine
2

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