試題詳解

40. Cells convert external nutrients as sources of energy into biologically universal, intracellular, chemical energy carrier, adenosine triphosphate (ATP). Which of the following descriptions about cellular energetics are CORRECT?
(A) Glucose oxidation in eukaryotic cells can be divided into four stages: glycolysis, citric acid cycle, electron transport chain and ATP synthesis, where all take place in mitochondria.
(B) The oxidation of short- to long-chain fatty acids occurs in mitochondria with production of ATP, whereas oxidation of very long-chain fatty acids occurs primarily in peroxisomes and is not linked to ATP production.
(C) The rate of glucose oxidation via glycolysis is regulated by the inhibition or stimulation of several enzymes, depending on the cell's need for ATP.
(D) Neither glycolysis nor the citric acid cycle directly use molecular oxygen.
(E) ATP synthase catalyzes ATP synthesis as electron flow through the inner mitochondrial membrane down their electrochemical gradient.