BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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moles of Adenine = moles of Cytosine
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moles of Cytosine = moles of Guanine
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moles of Cytosine = moles of Thymine
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none of the above
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Detailed explanation-1: -According to the Chargaff’s rule, DNA from any cell of all organisms have pyrimidine and purine bases in 1:1 ratio. Hence, the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine. This is because, in a dsDNA, adenine pairs with thymine and guanine pairs with cytosine.
Detailed explanation-2: -There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine).
Detailed explanation-3: -The final composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine.
Detailed explanation-4: -Cytosine (C) is one of the four nucleotide bases in DNA, with the other three being adenine (A), guanine (G) and thymine (T). Within a double-stranded DNA molecule, cytosine bases on one strand pair with guanine bases on the opposite strand. The sequence of the four nucleotide bases encodes DNA’s information.
Detailed explanation-5: -In a DNA molecule cytosine is 18%.