Question

when electrons bind to oxygen at the end of the electron transport chain, ______ is formed.
o atp
o phosphate
o water
o hydrogen

Explanation:

In the electron - transport chain, at the end, electrons combine with oxygen and protons to form water. This is a key step in cellular respiration for generating energy. Oxygen acts as the final electron acceptor, and the reaction is 2H⁺ + 2e⁻+ 1/2O₂ → H₂O.

Answer:

C. water