BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If a researcher investigating a RNA strand discovers it contains 36% uracil, which of the following identifies the amount of cytosine?
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14%
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28%
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64%
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cannot be determined
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Explanation:
Detailed explanation-1: -Thus, thymine is the nitrogenous base which is not present in RNA.
Detailed explanation-2: -Thymine is exclusively present in DNA. Uracil replaces thymine in RNA; thus, RNA contains the following four nitrogenous bases: adenine, guanine, cytosine, and uracil.
Detailed explanation-3: -Final answer: The purine base present in RNA is guanine.
Detailed explanation-4: -Correct answer: Uracil is only found in RNA under normal conditions. It replaces thymine, which is only found in DNA. Therefore, thymine, adenine, cytosine, and guanine are the bases found in DNA, and uracil, adenine, cytosine, and guanine are the bases found in RNA.
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