Search any question & find its solution
Question:
Answered & Verified by Expert
If $A$ and $C$ make $30 \%$ and $20 \%$ of DNA, respectively, what will be the percentage composition of $\mathrm{T}$ and $\mathrm{G}$ ?
Options:
Solution:
1652 Upvotes
Verified Answer
The correct answer is:
$\mathrm{T}: 30 \%, \mathrm{G}: 20 \%$
$$
\begin{aligned}
& \mathrm{A} \rightarrow 30 \%=\mathrm{T} \rightarrow 30 \% \\
& \mathrm{C} \rightarrow 20 \%=\mathrm{G} \rightarrow 20 \%
\end{aligned}
$$
According to chargaff's rule, Adenine (A) pairs with Thymine (T) and Cytosine (C) pairs with Guanine (G). So, The ds DNA have equal percentage of $A$ and $T$ or $G$ and $C$.
\begin{aligned}
& \mathrm{A} \rightarrow 30 \%=\mathrm{T} \rightarrow 30 \% \\
& \mathrm{C} \rightarrow 20 \%=\mathrm{G} \rightarrow 20 \%
\end{aligned}
$$
According to chargaff's rule, Adenine (A) pairs with Thymine (T) and Cytosine (C) pairs with Guanine (G). So, The ds DNA have equal percentage of $A$ and $T$ or $G$ and $C$.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.