BIOLOGY
NUCLEIC ACIDS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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15%
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30%
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35%
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Detailed explanation-1: -A: The correct answer is option 2 The segment with 24%C content.
Detailed explanation-2: -Answer and Explanation: If a DNA sample were composed of 15% adenine then there would also be 15% thymine according to Chargaff’s rules. Chargaff’s rules explained that adenine always pairs with thymine and cytosine always pairs with guanine in a DNA molecule.
Detailed explanation-3: -If 15% of the nucleotides in a DNA molecule contain guanine, what percentage of the nucleotides contain each of the other three bases? Explain your reasoning. Total will be 100%. So if 15% is Guanine then Cytosine has to be 15% (because they base pair with each other).
Detailed explanation-4: -Correct answer: Together, adenine and thymine compose 70% of the segment. This means that 30% of the section is composed of guanine-cytosine pairs. Since these two bases will be equal in quantity, 15% of the DNA section will be cytosine bases.
Detailed explanation-5: -So since they have asked only regarding the uracil, We can say that it is only 15%.