THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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18% cytosine, 32% adenine, 32% thymine
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32% cytosine, 18% adenine, 32% thymine
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18% cytosine, 64% adenine, 64% thymine
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32% cytosine, 32% adenine, 18% thymine
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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: -Since cytosine and guanine are present in equal amounts, we can simply divide their sum by 2. The final composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine. Uracil is only found in RNA.
Detailed explanation-3: -Cytosine (C) makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine (T)? Was this helpful ?
Detailed explanation-4: -In the above question they mentioned that the amount of cytosine is 18%, which means from the above mentioned statement, the guanine percentage is the same as cytosine, it means guanine percentage is also 18% .
Detailed explanation-5: -In DNA of certain organisms, guanine constitutes 20% of the bases.