Write in a few lines about Watson and Crick Model of DNA molecule. Give its potential also.
class 12th CBSE Biology sample paper
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The DNA molecule has the form of a twisted ladder.
The vertical bars of the ladder are formed by alternating deoxyribose sugar and phosphate components, while horizontal rungs of the ladder are attached to the deoxy sugar components of the vertical bars which are composed of purines and pyrimidines linked up together through hydrogen bonds.
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The structure of DNA is versatile along its length, capable of coiling into tight loops, and other shapes. In all species of organisms it is composed of 2 helical chains, linked to each other by H-bonds. Both chains are coiled round the same axis, and have the same pitch of 34 ångströms.
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