In DNA of certain organisms, guanine constitutes 20% of the bases. What percentage of the bases would be adenine? |
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a) |
0% |
b) |
10% |
c) |
20% |
d) |
30% |

In DNA of certain organisms, guanine constitutes 20% of the bases. What percentage of the bases would be adenine? |
|||||||

a) |
0% |
b) |
10% |
c) |
20% |
d) |
30% |

1 Answer

127 votes

According to Chargaff’s rule, in DNA, the proportion of adenine always equals to that of thymine and proportion of guanine always equal to that of cytosine, ., A=T and G=C. Thus, in a DNA, if guanine is 20%, cytosine also will be 20%. So, both adenine and thymine together will be 60%, 30% adenine and 30% thymine. |

127 votes

127