Which of the Following Represents an "Activated" Carrier Molecule

Question

Which of the following represents an "activated" carrier molecule?
A) AMP
B) NADH
C) NAD⁺
D) NADP⁺
E) CoA

Accepted Answer

The activated carrier molecules carry chemical groups in high-energy linkages and can deliver the group or the energy (or both) to metabolic reactions when necessary. They then need to be activated again. NADH is an activated carrier, while its oxidized form NAD⁺ is not.