PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statement about DNA and RNA is correct?
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DNA contains uracil, while RNA does not.
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RNA is arranged in a double helix, while DNA is not.
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RNA contains the sugar ribose, while DNA does not.
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DNA contains phosphates and nitrogenous bases, while RNA does not.
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Explanation:
Detailed explanation-1: -The sugar component in RNA is ribose and the sugar component in DNA is 2-deoxyribose. The sugar component in RNA is arabinose and the sugar component in DNA is ribose.
Detailed explanation-2: -RNA contains the 5-carbon sugar ribose, whereas in DNA, the sugar is deoxyribose. The difference between ribose and deoxyribose is the lack of a hydroxyl group attached to the pentose ring in the 2’ position of deoxyribose.
Detailed explanation-3: -So, the correct option is ‘RNA contains ribose.
There is 1 question to complete.