(a(i))[3]
In the cells of the grasshopper, $\textit{Chorthippus brunneus}$, $20\%$ of the nucleotides in nuclear DNA contain thymine. Calculate the percentage of nucleotides in the nuclear DNA of $C.\ brunneus$ that contain guanine, and explain your answer using the structure of DNA.
(a(ii))[1]
State another site, apart from the nucleus, where DNA is present in the cells of $C.\ brunneus$.
(b(i))[1]
Complete Fig. 6.1 by entering the base sequence in the region marked R.
(b(ii))[3]
State the name of region Q and explain what region Q does in translation.
(b(iii))[1]
State the role of region P.