Which of the following sequences describes the path by which electrons travel downhill energetically in aerobic respiration?
A) glucose → NADH → electron transport chain → oxygen
B) glucose → pyruvate → ATP → oxygen
C) glucose → pyruvate → electron transport chain → NADH → ATP
D) food → glycolysis → citric acid cycle → NADH → ATP

Question

Quizplus · Accepted Answer

Aerobic respiration involves the breakdown of glucose to produce energy in the form of ATP. The electrons from glucose are transferred to NAD+ to form NADH, which is then passed down the electron transport chain. The electron transport chain ultimately transfers the electrons to oxygen, which is the final electron acceptor. Therefore, the correct sequence is glucose → NADH → electron transport chain → oxygen. Option A describes this sequence. Option B describes anaerobic respiration, and Option C describes the process but in reverse order. Option D describes the processes of cellular respiration, but it does not provide a sequence that specifically describes how electrons travel downhill energetically in aerobic respiration.

Which of the Following Sequences Describes the Path by Which