CBSE Class 12 Chemistry Biomolecules Questions

CBSE Class 12 Chemistry Biomolecules Questions. Students are advised to refer to the attached assignments and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.

1. Name polysaccharide which is stored in the liver of animals.
2. What structural feature is required for a carbohydrate to behave as reducing sugar?
[Hint : The carbonyl group of any one monosaccharide present in carbohydrate should be free]
3. How many asymmetric carbon atoms are present in D (+) glucose?
4. Name the enantiomer of D-glucose.
[Hint : L-glucose]
5. Give the significance of (+)-sign in the name D-(+)-glucose.
[Hint : (+) sign indicates dextrorotatory nature of glucose].
6. Give the significance of prefix ‘D’ in the name D-(+)-glucose.
[Hint : ‘D’ Signifies that –OH group on C-5 is on the right hand side]
7. Glucose is an aldose sugar but it does not react with sodium hydrogen sulphite. Give reason.
[Hint : The –CHO group reacts with –OH group at C–5 to form a cyclic hemiacetal].
8. Why is sucrose called invert sugar?
[Hint : When sucrose is hydrolysed by water, the optical rotation of solution changes from positive to negative.]
9. Name the building blocks of proteins.
10. Give the structure of simplest optically active amino acid.
11. Name the amino acid which is not optically active.
12. Write the Zwitter ionic form of aminoacetic acid.
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