CBSE Class 12 Chemistry Biomolecules Quiz 3

1. Cellulose is a

A hexapolysaccharide B pentapolysaccharide C tripolysaccharide D None of these

2. The letter ‘D’ in carbohydrates signifies

A dextrorotatory B configuration C diamagnetic nature D mode of synthesis

3. A diabetic person carries a packet of glucose with him always, because

A glucose increases the blood sugar level slowly B glucose reduces the blood sugar level C glucose increases the blood sugar level almost instantaneously D glucose reduces the blood sugar level slowly

4. Among the naturally occurring carbohydrates, furanose ring is found in the

A Glucose unit of cane sugar B Glucose unit of cellulose C Fructose unit of cane sugar D Galactose unit of lactose

5. Globular proteins are present in

A blood B eggs C milk D all of these

6. Which one of the amino acids can be synthesised in the body?

A Alanine B Lysine C Valine D Histidine

7. Which of the following is not true about amino acids?

A They are constituents of all proteins B Alanine having one amino and one carboxylic group C Most naturally occurring amino acids have D-configuration D Glycine is the only naturally occuring amino acid which is optically inactive.

8. A compound which contains both ………… and ………… is called amino acid. The amino acids is polypeptide chain are joined by ………/ bonds.

A amino, carboxylic group, ester B amino, carboxylic group, peptide C nitrogen, carbon, glycosidic D hydroxy, carboxylic group, peptide

9. Denaturation of protein leads to loss of its biological activity by

A formation of amino acids B loss of primary structure C loss of both primary and secondary structure D loss of both secondary and tertiary structures

10. Proteins are condensation polymers of

A α-amino acids B β-amino acids C α-hydroxy acids D β-hydroxy acids