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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bm274

Which of the following statements about the compound shown is/are correct?

  1. AIt contains a purine base.
  2. BIts base forms three hydrogen bonds with cytosine.
  3. CIts sugar is ribose, so it is an RNA component.
  4. DIt is a nucleotide because it contains a ribose sugar.

Answer: A, B, C

The base is guanine, a fused two-ring purine, and it pairs with cytosine through three hydrogen bonds. The sugar has a 2'-OH, so it is ribose (RNA). The molecule is guanosine, a nucleoside, because it lacks a phosphate group; so the last statement is false.
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