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Which of the following statements is correct? (a)Adenine is a pyrimidine

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in Chemistry – Class 12 by (188k points)
Which of the following statements is correct?

(a) Adenine is a pyrimidine

(b) DNA is made of amino acids

(c) Nucleosides do not contain phosphorous

(d) RNA contains thymine

I had been asked this question in a job interview.

This intriguing question originated from Biomolecules topic in division Biomolecules of Chemistry – Class 12

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The correct option is (c) Nucleosides do not contain phosphorous

For explanation: Adenine is a substituted purine as it has two fused rings. DNA is made up of nucleotides. RNA does not contain thymine, instead it has uracil. Nucleosides have a base attached to a pentose sugar. Since both the sugar and base do not contain phosphorous, nucleosides do not have it. On the other hand, nucleotides contain phosphorous in the form of phosphoric acid.

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