The bond between the phosphate and hydroxyl group of sugar  is an

(A)ether bond

(B)ester bond

(C)glycosidic bond

(D)amide bond

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How many phosphodiesters bond are present in 5’ATTTTTGG 3’ sequence of nucleotides

(A)7

(B)9

(C)8

(D)6

Concept Questions :-

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

(A)7

(B)9

(C)8

(D)6

Concept Questions :-

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The DNA exists as _________helix which runs ________

(A)double, parallel

(B)double, antiparallel

(C)single, perpendicular

(D)single, parallel

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The backbone of the DNA is formed by

(A)sugar, phosphate, sugar chain

(B)sugar, phosphate, nitrogenous base chain

(C)Phosphate, sugar, phosphate chain

(D)Both A and B

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Both the strands of the DNA are joined by

(A)Disulphide bond

(B)hydrogen bonds

(C)Glycosidic bonds

(D)phosphodiester bonds

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In DNA strands, there are ____ H- bonds b/w A and T and ____H-bonds b/w G and C respectivley

(A)2,3

(B)3,2

(C)2,2

(D)3,3

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Which of the following is the pitch of B-DNA

(A)34Angstrom

(B)34 nanometre

(C)34 picometre

(D)34 femtometre

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Which model explains the double helic nature of DNA

(A)Watson and Crick Model

(B)Gene Battery Model

(C)Sanger Sequencing

(D)Both A and C

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The amino acids which are synthesised by our body are known as

(A)Essential amino acids

(B)Non-essential amino acids

(C)optical amino acids

(D)Both A and C

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