Thirty percent of the bases in a sample of DN | vedclass

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(B) According to Chargaff's rule,the amount of adenine $(A)$ is equal to the amount of thymine $(T)$,and the amount of guanine $(G)$ is equal to the a

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$20$

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(B) According to Chargaff's rule,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 $(C)$.Given that adenine is $30\%$,then thymine must also be $30\%$.The total percentage of $A + T$ is $30\% + 30\% = 60\%$.The remaining percentage for $G + C$ is $100\% - 60\% = 40\%$.Since $G = C$,the percentage of cytosine is $40\% / 2 = 20\%$.

Thirty percent of the bases in a sample of $DNA$ extracted from eukaryotic cells is adenine. What percentage of cytosine is present in this $DNA$ (in $\%$)?

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