题目
题目
单项选择题

Question at position 77 The main source of molecular oxygen (O2) in Earth’s atmosphere is:aerobic respirationthe citric acid cyclelinear electron flow/non-cyclic electron flowthe C3 cyclethe mitochondrial electron transport chain

选项
A.aerobic respiration
B.the citric acid cycle
C.linear electron flow/non-cyclic electron flow
D.the C3 cycle
E.the mitochondrial electron transport chain
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思路分析
Question restatement: The main source of molecular oxygen (O2) in Earth’s atmosphere is being asked. Answer choices include several processes from respiration and photosynthesis. Option 1: aerobic respiration. This pathway consumes O2 to produce ATP, CO2, and water. It does not release O2 into the atmosphere, so it cannot be the source of a......Login to view full explanation

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