A. Fermentation
B. Cellular Respiration
C. Photosynthesis
D. All of the above are equally efficient
2007-04-22 12:15:02 · 2 answers · asked by chanelbabe 2 in Science & Mathematics ➔ Biology
B
2007-04-22 12:23:16 · answer #1 · answered by justin b 4 · 0⤊ 0⤋
B. Cellular respiration allows the pyruvate that results from glycolysis to continue breaking down into smaller and smaller pieces, resulting in many more ATP per glucose molecule. The last stage or respiration, the electron transport chain, is the big pay-off as far as ATO generation is concerned.
Not A. Fermentation follows glycolysis and allows NADH to be turned back into NAD+ so glycolysis can continue. This process only reaps a net gain of 2 ATP from a molecule of glucose as opposed to around 38 ATP when oxygen is available and is used.
Not C. Photosynthesis builds sugar to store energy; it doesn't break sugar to extract energy.
2007-04-22 20:09:15 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋