A researcher analyzes a nucleic acid sample. After looking only at its nucleotide composition, he decisively concludes that this sample represents single-stranded DNA and not another form of nucleic acid. Which of the following compositions most likely represents this sample?

A. 17% A, 17% T, 33% G, 33% C
B. 29% A, 14% U, 11% G, 46% C
C. 4% A, 4% U, 46% G, 46% C
D. 12% A, 12% T, 30% G, 46% C

D. 12% A, 12% T, 30% G, 46% C

Explanation:

Both option A and D could represent single strand DNA but since A has equal proportion of A and T/G

C could also represent double stranded DNA.

The best option here is option D.

An unsupported hypothesis can be valuable because it can lead to another investigation that produces valid results (Option A).

A hypothesis is a given explanation about some question of the natural world.This explanation (hypothesis) must be testable in order to be confirmed or rejected.The hypothesis is tested by using the scientific method (i.e., by experimentation and/or observational procedures).

In conclusion, an unsupported hypothesis can be valuable because it can lead to another investigation that produces valid results (Option A).

Learn more in:

link