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28 August, 12:18

Which of the following facts relates to Chargaffs rule?

A. DNA contains a pentose sugar, nitrogenous bases, and a phosphate group

B. DNA is a molecule in structure

C. DNA contains thymine, cytosine, adenine, and guanine

D. Cytosine and guanine appear in equal proportions in DNA

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  1. 28 August, 13:59
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    The correct answer is D. Cytosine and guanine appear in equal proportions in DNA.

    Explanation:

    Chargaff's rules state the relationship that exists between the nucleotides that make up DNA:

    The amount of Adenine (A) is equal to the amount of Thymine (T), and the amount of Guanine (G) is equal to the amount of Cytosine (C). In synthesis: the total number of purine bases is equal to the total number of pyrimidine bases:

    A + G = C + T
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