THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In DNA, if there are 18 Adenine then there are 18 ____
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Guanine
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Thymine
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Cytosine
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Adenine
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Explanation:
Detailed explanation-1: -According to Chargaff’s rule in a DNA molecule A = T and G = C and A + G + C + T = 100%. Here cytosine (C) is 18% hence G = 18% ∴ A + T = (100 – 36)% ∴ A + T = 64% ∴ A = 32%
Detailed explanation-2: -Chargaff’s rules states that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.
Detailed explanation-3: -Therefore, the answer is T = 30%, A = 30%, G = 20% and C = 20%.
Detailed explanation-4: -Thymine (T) makes up 28% of the nucleotides in a sample of DNA from an organism.
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