If HCO 3 - that is radioactively labeled with 13 C is available, which carbon atom in the molecule below would ultimately be expected to be radioactive?
A) A
B) B
C) C
D) D

Question

If HCO 3 - that is radioactively labeled with 13 C is available, which carbon atom in the molecule below would ultimately be expected to be radioactive? 
A) A 
B) B 
C) C 
D) D

Quizplus · Accepted Answer

The radioactive label is on S1U1P11, so the carbon atom that would ultimately be expected to be radioactive is the carbon attached to the phosphate group (marked with an asterisk) in the sugar moiety of S1U1P11, which is carbon C3. This carbon is directly connected to the phosphate group and would therefore pick up the radioactive label.

If HCO3- that Is Radioactively Labeled with 13C Is Available

If HCO₃^-that Is Radioactively Labeled with ¹³C Is Available