Question

The GC content of Chlamydomonas is approximately 70% in the coding sequences. What percentage of DNA is made up of adenine bases?

A)35%
B)Can't determine
C)70%
D)15%
E)30%

Answer 1

If the GC content of Chlamydomonas coding sequences is 70%, then the percentage of adenine bases would be 15%, according to Chargaff's rules.

Step-by-step explanation:

The question you're asking pertains to the percentage of adenine bases in Chlamydomonas when the GC content in the coding sequences is approximately 70%. According to Chargaff's rules, which state that the amount of adenine (A) equals the amount of thymine (T) and the amount of guanine (G) equals the amount of cytosine (C), we can determine that if G+C equals 70%, then A+T must equal 30% (as DNA is composed of A, T, G, and C which must add up to 100%). Since adenine pairs with thymine, they are present in equal amounts, which means adenine makes up 15% of the bases in the DNA.

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