Choose the correct answers from the alternatives given :
Which of the following is not a chemical component of deoxyribonucleic acid?

Thymine

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A phosphate group

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A pentose sugar

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Uracil

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Solution

The correct option is D Uracil
Deoxyribonucleic acid typically consists of four nitrogen bases which are adenine, guanine, thymine, and cytosine. In RNA, uracil is present instead of thymine. Uracil is not a chemical component of deoxyribonucleic acid or DNA.
So, the correct option is 'Uracil'.

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