Watson and Cricks model of DNA

Double Helix model of DNA was proposed by

• Jacob and Monad

• Watson and Crick

• Hardy and Winburg

• Fredrick Mischer

The two strands of DNA are ..........

• perpendicular

• parellal

• antiparellal

• tangential

Adenine forms .......... H-bonds with Thymine

• 1

• 2

• 3

• 4

DNA helix turns in .......... direction

• upward

• downward

• clock wise (right handed)

• anticlockwise (left handed)

................. are buildinng blocks of DNA

• nucleiotides

• amino acids

• organic acids

• monosaccharides

Single turn of DNA includes .................. base pairs

• 5

• 10

• 12

• 15

diameter of DNA double helix is ............ nm

• 1

• 2

• 10

• 20

the backbone of DNA is madeup of ............

• nitrogen bases

• phosphate

• sugar

• sugar and phosphate

............... sugar is characteristic of DNA

• glucose

• fructose

• ribose

• deoxy-ribose

............... are the purine molecules in DNA

• Adenine and Thymine

• Guanine and Cytosine

• Adenine and Guanine

• Thymine and Cytosine