Question

Water is used during the electron transport chain in _____(1)_____, while water is formed from the electron transport chain in _____(2)_____.

(1) photosynthesis, (2) cellular respiration
(1) cellular respiration, (2) photosynthesis
(1) fermentation, (2) anaerobic respiration
(1) anaerobic respiration, (2) photosynthesis

Answer 1

I believe the answer to this is Fermentation and anaerobic respiration. 

Answer 2

(1) photosynthesis, (2) cellular respiration
So A