Which group of small molecules best fit the boxes associated with the reaction shown?
$$\begin{array} { l l l }
& \text { a } & \text { b } \
\text { I. } & \mathrm { NAD } ^ { + } & \mathrm { NADH } \
\text { II. } & \mathrm { NADP } ^ { + } & \mathrm { NADPH } \
\text { III. } & \mathrm { ADP } ^ { + } + \mathrm { P } _ { i } & \mathrm { ATP } ^ { \mathrm { IT } } \
\text { IV. } & \mathrm { FAD } &\ { \mathrm { FADH } }
\end{array}$$
A) I
B) II
C) III
D) IV

Question

Which group of small molecules best fit the boxes associated with the reaction shown? 
$$\begin{array} { l l l } 
& \text { a } & \text { b } \
\text { I. } & \mathrm { NAD } ^ { + } & \mathrm { NADH } \
\text { II. } & \mathrm { NADP } ^ { + } & \mathrm { NADPH } \
\text { III. } & \mathrm { ADP } ^ { + } + \mathrm { P } _ { i } & \mathrm { ATP } ^ { \mathrm { IT } } \
\text { IV. } & \mathrm { FAD } &\ { \mathrm { FADH } }
\end{array}$$
A) I 
B) II 
C) III 
D) IV

Quizplus · Accepted Answer

The reaction shown involves the reduction of NAD+ to NADH, indicating that small molecules involved in redox reactions are needed. The only option that contains such molecules is Group I, which includes NAD+ and NADH. Therefore, the best choice is A.

Which Group of Small Molecules Best Fit the Boxes Associated