Question:

Which of the following is correxct about Hbonding in nucleotide

Updated On: Apr 20, 2024
  • A–T G–C
  • A–G T–C
  • G–T A–C
  • A–A T–T
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The Correct Option is A

Solution and Explanation

The correct option is(A): A–T G–C. Structure of DNA molecule is a double helix structure. In this structure double helix are made up of polynucleotide chains which are held together by H-bonds the adenine (A) base is linked with thymine (T) by two H-bonds and guanine (G) is linked with cytocine (C) by three H-bonds as A–T G–C.
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Chemically, DNA is a composition of a pentose sugar, phosphoric acid, and some cyclic bases that have nitrogen in them. DNA has β-D-2-deoxyribose in it, in the form of the sugar moiety.

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The RNA molecule is a composition of phosphoric acid, a pentose sugar, and some cyclic bases containing nitrogen. The sugar moiety inside RNA molecules is β-D-ribose.