Multiple choice

A purine is a colourless crystalline solid which can be prepared from uric acid. Which of the following is a purine derivative?

  1. Xanthine

  2. Hypoxanthine

  3. Xanthosine 5'-triphosphate

  4. Guanine
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B Correct answer
Explanation

Hypoxanthine is a naturally occurring purine derivative. It is occasionally found as a constituent of nucleic acids where it is present in the anticodon of tRNA in the form of its nucleoside inosine. It has a tautomer known as 6-Hydroxypurine. Hypoxanthine is a necessary additive in certain cell, bacteria, and parasite cultures .

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