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प्रश्न
Which of the following is not a chemical component of deoxyribonucleic acid?
विकल्प
Thymine
A phosphate group
A pentose sugar
Uracil
MCQ
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उत्तर
Uracil
Explanation:
DNA is made of three key parts: a phosphate group, a pentose sugar (specifically deoxyribose), and four nitrogenous bases, including thymine. While DNA uses adenine, guanine, cytosine, and thymine to store genetic information, uracil is only found in RNA. In RNA molecules, uracil serves as the replacement for thymine to pair with adenine, making it a distinct chemical marker that separates the two types of nucleic acids.
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