GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cytosine and thymine ____ adenine and guanine
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adenine and thymine ____ cytosine and guanine
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adenine and cytosine ____ guanine and thymine
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adenine and guanine ____ cytosine and thymine
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Detailed explanation-1: -While they are similar in many aspects, there are so many key differences between them. So, the correct answer is option B. Note: Adenine and guanine are purines while cytosine, thymine and uracil are pyrimidines.
Detailed explanation-2: -The purines in DNA are adenine and guanine, the same as in RNA. The pyrimidines in DNA are cytosine and thymine; in RNA, they are cytosine and uracil.
Detailed explanation-3: -Purines. Adenine and guanine are found in both DNA and RNA.
Detailed explanation-4: -Thus, the pyrimidine bases present in DNA are thymine and cytosine.
Detailed explanation-5: -Purine and pyrimidine are fundamental components of nucleotides in DNA. There are three pyrimidines cytosine, thymine, and uracil and two purines adenine and guanine.