Which of the following is the correct sequence of events in cellular respiration?
A) glycolysis$\rarr$preparatory reaction$\rarr$citric acid cycle$\rarr$electron transport chain
B) Krebs cycle$\rarr$electron transport$\rarr$glycolysis$\rarr$preparatory reaction
C) glycolysis$\rarr$Krebs cycle$\rarr$electron transport chain
D) Krebs cycle$\rarr$glycolysis$\rarr$electron transport chain$\rarr$preparatory reaction
E) glycolysis$\rarr$electron transport chain$\rarr$preparatory reaction

Question

Quizplus · Accepted Answer

The correct sequence of events in cellular respiration is glycolysis, preparatory reaction, citric acid cycle, and electron transport chain. This is because glycolysis occurs in the cytoplasm of the cell, while the preparatory reaction, citric acid cycle, and electron transport chain occur within the mitochondria. The preparatory reaction links glycolysis and the citric acid cycle, while the citric acid cycle generates energy-rich molecules such as ATP and NADH. The electron transport chain then uses these energy-rich molecules to create a proton gradient, which is ultimately used to generate ATP through a process called oxidative phosphorylation.

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