Question

question 8
1 pts
if a dna sample contains 33% thymine, what percentage of the sample is guanine?
50%
33%
66%
34%
17%

Explanation:

Step1: Recall DNA base pairing

In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). So, the percentage of A = percentage of T, and percentage of G = percentage of C.

Step2: Calculate total percentage of A and T

Given T = 33%, so A is also 33%. The total percentage of A + T is \(33\% + 33\% = 66\%\).

Step3: Calculate percentage of G and C

The total percentage of all bases in DNA is 100%. So, the percentage of G + C is \(100\% - 66\% = 34\%\). Since G and C are equal, the percentage of G is \(\frac{34\%}{2}= 17\%\).

Answer:

17% (the option with 17%)