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

(1)Act as hormones

(2)act as enzymes

(3)act as genetic material

(4)fight against infections

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

(1)Collagen

(2)Albumin

(3)RUBISCO

(4)Antibody

Which of the following is present as a store house of energy in animal tissues?

(1)Cellulose

(2)Sucrose

(3)Glycogen

(4)Starch

Starch gives blue colour with iodine because of

(1)It exists in globular form

(2)I₂ gets hold in helical form

(3)It has blue colour pigment

(4)All of the above

Cellulose is present in

(1)cotton fibres

(2)Paper

(3)Cell wall of plants

(4)All of these