Question

If you consider the combined processes of photosynthesis and cellular respiration, the electrons found in H 2O at the beginning of the light reactions end up attaching to ________ during respiration.

Answer 1

`O_(2)` to form
`H_(2)O`

Step-by-step explanation:

The electrons start their journey through metabolism in
`H_(2)O` and end in the
`H_(2)O` that is made.
`O_(2)` serves as the final electron acceptor in oxidative phosphorylation, so as to combine with protons to make new "metabolic" water.