Which of the Following Correctly Describes the Structure of a Nucleotide

Question

Which of the following correctly describes the structure of a nucleotide?
A)adenine is bound via a link between N-7 and C-1 of ribose
B)phosphates are always bound to C-2 of ribose
C)cytosine is bound via a link between the amine on C-4 and C-1 of ribose
D)guanine is bound via a link between N-9 and C-1 of ribose
E)none of the above

Accepted Answer

Guanine is bound via a glycosidic bond between N-9 and C-1 of ribose in a nucleotide. Option A is incorrect as adenine is bound via a glycosidic bond between N-9 and C-1 of ribose. Option B is incorrect as phosphates are always bound to C-5 of ribose, not C-2. Option C is incorrect as cytosine is bound via a glycosidic bond between N-1 and C-1 of ribose.