If a DNA strand contains 26% thymine, what percent adenine will there be in the same DNA molecule?
Hint: use Chargaff's Rules
24%
27%
26%
23%

26%

Explanation:

Adenine and Thymine are pairs. Therefore, they must have the same amount.

It must always equal 100% and base pairs always have the same amount.  So in this case Adenine and Thymine would be 26% and Guanine and Cytosine would be 24%.

Test question: If a DNA strand has 10% Guanine how much Adenine would there be?

G-10, C-10, A-40, T-40= 100%

I hope this helps! :)

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%