Question

48/50
water is the end product of--
krebs cycle
photosynthesis
glycolysis
electron transport chain
calvin cycle

Explanation:

In cellular respiration, the electron transport chain is the final stage. Here, electrons are passed through a series of proteins, and oxygen acts as the final electron acceptor. When oxygen accepts electrons, it combines with hydrogen ions (\(H^+\)) to form water (\(H_2O\)). The Krebs cycle produces carbon dioxide (\(CO_2\)) and energy - carrying molecules like NADH and FADH₂. Glycolysis breaks down glucose into pyruvate and produces a small amount of ATP and NADH. Photosynthesis (including the Calvin cycle which is part of the light - independent reactions of photosynthesis) uses carbon dioxide (\(CO_2\)) and water (\(H_2O\)) to produce glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)) (in the light - dependent reactions).

Answer:

electron transport chain