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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20%
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30%
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60%
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50%
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Detailed explanation-1: -Since adenine is 20%, then thymine is 20% as well. The total of both is 40%. From 100 remains 60% which is divided equally between guanine and cytosine, so each is 30%.
Detailed explanation-2: -If a DNA molecule contains 20% adenine, this means that Thymine is also 20%. Together these total up to 40%. The remaining 60% is shared between guanine and cytosine, meaning that each base occupies 30% of the DNA. Guanine is therefore 30% of the DNA molecule.
Detailed explanation-3: -The correct answer is c. The percentage of adenine and thymine are always the same, which means that 20% plus 20% = 40%. Since 40% of the DNA is made up of adenine-thymine pairs, that leaves 60% of the DNA remaining as cytosine-guanine pairs.
Detailed explanation-4: -The remaining 60% represents both G + C molecule. Since cytosine and guanine are always present in equal numbers, the percentage of guanine molecule is 30%.
Detailed explanation-5: -Since adenine and guanine are always present in equal numbers, the percentage of adenine molecule is 30%.