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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If there is 23% Guanine in a DNA molecule, how much Uracil exists in the same molecule?
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23%
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46%
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54%
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27%
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0%
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Explanation:
Detailed explanation-1: -DNA bases bond in pairs with Thymine to Adenine and Guanine to Cytosine. For every one Thymine there will be one Adenine. So, 23% Thymine would mean that there is also 23% Guanine.
Detailed explanation-2: -Answer and Explanation: The correct answer: A DNA molecule with 24% guanine would have 26% adenine.
Detailed explanation-3: -Therefore the base percentage of GC is 54% in the whole DNA sequence.
Detailed explanation-4: -From 100 remains 60% which is divided equally between guanine and cytosine, so each is 30%. Uracil is not found in DNA but it will have the same percentage as thymine, i.e the RNA will have 30% uracil.
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