11
-Which of the Reactions Below Is Written in the Direction

11
-Which of the reactions below is written in the direction "electron acceptor $\rightarrow$ electron donor"?
a. ubiquinone $+2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow$ ubiquinone
b. $\mathrm{Fe}^{2+} \rightarrow \mathrm{Fe}^{3+}+\mathrm{e}^{-}$
c. $\mathrm{FADH}_{2} \rightarrow \mathrm{FAD}+2 \mathrm{H}^{+}+2 \mathrm{e}^{-}$
d. Glucose $+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CO}_{2}+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}$
e. $\mathrm{HS}^{-} \rightarrow \mathrm{S}^{0}+\mathrm{H}^{+}+2 \mathrm{e}$