The early energy reactions used hydrogen,which is a powerful ________ and could have been used to form ________.
A) oxidant / the proton motive force
B) electron donor / the proton motive force
C) electron acceptor / oxygen
D) oxidant / oxygen

Question

Quizplus · Accepted Answer

Hydrogen is a powerful electron donor that could have been used to form the proton motive force, which is a key component of early energy reactions. Option A and D are incorrect because hydrogen is not an oxidant and it was unlikely that oxygen was present in the early atmosphere. Option C is incorrect because hydrogen is not an electron acceptor.

The Early Energy Reactions Used Hydrogen,which Is a Powerful ________