The four elements making 99 % of living system are:

1.	CHOS	2.	CHOP
3.	CHON	4.	CNOP

The following diagram depicts the structure of a:

1. Nucleoside
2. Nucleotide
3. Nitrogen containing Monosaccharide
4. Glycoprotein

How many types of nitrogenous bases are present in nucleic acid

1. 4
2. 3
3. 5
4. 6

The number of cyclic rings present in purines and pyrimidines are

1. 2,1 respectively

2. 1,2 respectively

3. 2,2 respectively

4. 1,1 respectively

How many phosphodiester bonds are present in 5’ATTTTTGG 3’ sequence of nucleotides

1. 7
2. 9
3. 8
4. 6

Both the strands of the DNA are joined by

1.Disulphide bond

2.hydrogen bonds

3. Glycosidic bonds

4. phosphodiester bonds

Which model explains the double helix nature of DNA

1.Watson and Crick Model

2 .Gene Battery Model

3. Sanger Sequencing

4  Both A and C

The body meets the demand of essential amino acids through

1. Food

2. Body synthesised  on its own

3. Both A and B

4. None of these

Which of the following is not the function of protein

Which of the following is the most abundant protein in the whole of the biosphere?

1.Collagen

2. Albumin

3. RUBISCO

4. Antibody