OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is not true concerning the differences between RNA and DNA?
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RNA contains pyrimidines while DNA contains purines.
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The sugar in DNA contains one less oxygen than the sugar in RNA.
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DNA forms a double helix while RNA is able to fold in on itself.
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RNA is thought to have evolved before DNA.
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Explanation:
Detailed explanation-1: -But DNA consists of Thymine and Cytosine as pyrimidine bases and RNA contains Uracil and Cytosine as the pyrimidine bases. Therefore, the common pyrimidine in both DNA and RNA is Cytosine.
Detailed explanation-2: -There are two differences that distinguish DNA from RNA: (a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom), and (b) RNA has the nucleobase uracil while DNA contains thymine.
There is 1 question to complete.