Refer to the figure below showing two strands of DNA. Which statement about uracil can you infer to be true?
A) It has a double ring and forms two hydrogen bonds.
B) It has a single ring and forms two hydrogen bonds.
C) It has a double ring and forms three hydrogen bonds.
D) It has a single ring and forms three hydrogen bonds.
E) It has a single ring and forms one hydrogen bond.

Question

Refer to the figure below showing two strands of DNA.  Which statement about uracil can you infer to be true?
A) It has a double ring and forms two hydrogen bonds. 
B) It has a single ring and forms two hydrogen bonds. 
C) It has a double ring and forms three hydrogen bonds. 
D) It has a single ring and forms three hydrogen bonds. 
E) It has a single ring and forms one hydrogen bond.

Quizplus · Accepted Answer

Uracil is a nitrogenous base that replaces thymine in RNA. It has a single ring structure and forms two hydrogen bonds with adenine in RNA. The question and the provided image do not indicate the presence of uracil in DNA, which normally contains thymine instead.

Refer to the Figure Below Showing Two Strands of DNA