If the GC content of a DNA molecule is \(60 \%\), what are the molar percentages of the four bases (G, C, T, A)?

Since the total percentage of bases in DNA should be equal to 100%, we can find the TA content, the combined percentage of Thymine (T) and Adenine (A) by subtracting the given GC content from 100%: TA content = 100% - GC content TA content = 100% - 60% TA content = 40% Now, we know the GC content is 60% and the TA content is 40%.

We will assume that the number of Guanine (G) bases is equal to the number of Cytosine (C) bases, and the number of Thymine (T) bases is equal to the number of Adenine (A) bases in the DNA molecule. This means we can split the GC content and the TA content evenly between the respective bases. Molar percentage of G = Molar percentage of C = GC content / 2 Molar percentage of T = Molar percentage of A = TA content / 2 Molar percentage of G = Molar percentage of C = 60% / 2 Molar percentage of T = Molar percentage of A = 40% / 2 Molar percentage of G = Molar percentage of C = 30% Molar percentage of T = Molar percentage of A = 20% The molar percentages of the four bases are G: 30%, C: 30%, T: 20%, and A: 20%.