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CBSE - Class 12 Chemistry Biomolecules Worksheet

1.

WHICH ONE IS CALLED  RNA FACTORY OF CELL?

a.

DNA

 b.

MITOCHONDRIA

 c.

RIBOZOME

 d.

NUCLEOLUS
2.
How are vitamins classified? Name the vitamin responsible for the coagulation of blood.
3.
The two strands in DNA are not identical but are complementary. Explain.
4.
What happens when D-glucose is treated with \(HNO_{3}\)?
5.
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
6.
Write two main functions of carbohydrates in plants.
7.
Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.
8.
What is the difference between a nucleoside and a nucleotide?
9.
Differentiate between globular and fibrous proteins.
10.
What are nucleic acids? Mention their two important functions.
11.
What type of bonding helps in stabilising the \(\alpha\)-helix structure of proteins?
12.

The accepted hypothesis for DNA replication is

a.

Conservative theory

 b.

Dispersive theory

 c.

Semi-conservative theory

 d.

Evolutionary theory
13.

Aspartic acid is

a.

acidic amino acid

 b.

basic amino acid

 c.

neutral amino acid

 d.

aromatic amino acid
14.
Why are vitamin A and vitamin C essential to us? Give their important sources.
15.
What are the hydrolysis products of lactose?
16.
Define Primary structure as related to proteins.
17.

Which is not in an amino acid?

a.

carboxyl group

 b.

hydrogen atom

 c.

chlorine 

 d.

amino group
18.
Define Peptide linkage as related to proteins.
19.
What are monosaccharides?
20.
What are essential and non-essential amino acids? Give two examples of each type.

Worksheet Answers

1.
Option D
12.
Option C
13.
Option A
17.
Option C
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