Which of the following are purine bases? 

(a) Guanine 

(b) Adenine 

(c) Thymine 

(d) Uracil 

This is a Multiple Answer Type Questions as classified in NCERT Exemplar

Correct options are a and b.

Purines are made up of a six-membered nitrogen-containing ring joined with a five-membered nitrogen-containing ring.

Purine bases are guanine and adenine, while pyrimidine bases are thymine and uracil.

 

Hence (a) and (b) are correct choices for this question.

<p>This is a Multiple Answer Type Questions as classified in NCERT Exemplar</p><p>Correct options are a and b.</p><p>Purines are made up of a six-membered nitrogen-containing ring joined with a five-membered nitrogen-containing ring.</p><p>Purine bases are guanine and adenine, while pyrimidine bases are thymine and uracil.</p><div class="photo-widget-full"><div class="figure"><picture><source srcset="" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/1750933251php8Ta8OL.jpeg" alt="" width="618" height="301" loading="lazy"></picture></div><div class="figure">&nbsp;</div></div><p>Hence (a) and (b) are correct choices for this question.</p>

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