Question

question 8
4 pts

1. one key molecule for the respiration process is:

nh2
ch4
co2
o2

Explanation:

Cellular respiration is a process where cells break down glucose to produce energy. Oxygen (\(O_2\)) is essential in the final stage (aerobic respiration) as the final electron acceptor in the electron - transport chain. \(NH_2\) (amino group) is not a key molecule in respiration. \(CH_4\) (methane) is a simple hydrocarbon and not involved in typical cellular respiration in most organisms. \(CO_2\) is a by - product of respiration (especially in the citric acid cycle and decarboxylation steps), not a key reactant like \(O_2\).

Answer:

\(O2\)