Concept explainers
To discuss:
The place from wherein cellular respirationdoes electrons in the electron transport chain come from and their final destination
Introduction:
Organisms obtain energy through a process called
Answer to Problem 39A
The high energy electrons in electron transport system come from NADH and FADH2.
Oxygen is the final electron acceptor in electron transport system.
Explanation of Solution
The final step in breakdown of glucose is electron transport during which high energy electrons and hydrogen ions from NADH and FADH2 are used to convert ADP to ATP. As NADH and FADH2 release electrons, the energy carriers are converted to NAD+ and FAD. H+ ions are pumped into the mitochondrial matrix. These ions diffuse down their concentration gradient back across the membrane and into the matrix through ATP synthase molecules in chemiosmosis. Oxygen is the final electron acceptor in electron transport system. Protons and electrons are transferred to oxygen to form water.
Chapter 8 Solutions
Biology Illinois Edition (Glencoe Science)
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