THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Adenine, Guanine, Cytosine, Thymine
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Adenine, Guanine, Cytosine, Ribose
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Adenine, Guanine, Cytosine, Uracil
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Adenine, Guanine, Cytosine, Deoxyribose
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Detailed explanation-1: -Uracil is the nitrogenous base present only in RNA, but not in DNA. Thymine is in DNA. DNA have thymine, guanine, adenine and cytosine.
Detailed explanation-2: -Uracil is present in RNA but not in DNA.
Detailed explanation-3: -Uracil is found only in RNA and not in DNA.
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.
Detailed explanation-5: -Uracil. The fact that uracil is present in RNA and not DNA contributes to the ability of RNA to be degraded easily. This allows the cell to change which genes are being expressed, as the older RNAs do not stick around for very long.