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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bm162

Select the correct statements.

  1. A2-Deoxyribose lacks the hydroxyl group at C2 that is present in ribose.
  2. BThymine is 5-methyluracil, so it differs from uracil by a methyl group.
  3. CAdenine and guanine are pyrimidine bases.
  4. DGuanosine is a nucleotide because it contains a base and a sugar.

Answer: A, B

Deoxyribose has no OH at C2, and thymine is uracil carrying a methyl group at C5. Adenine and guanine are purines. Guanosine is a nucleoside (base and sugar only); a nucleotide needs a phosphate.
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