Which kind of organism uses reverse electron flow to power the production of NADH?
Chemolithotrophs/Autotrophs use reverse electron flow to power the production of NADH.
Which kind of organism uses reverse electron flow to power the production of NADH?
Overall electron flow in a cell using reverse electron transport Consider a cell that is using reverse electron transport to generate NADH and is not (for the moment) using the proton gradient for anything else. Assume the cell is not a phototroph (so electrons are not being recycled by light-driven pumping). Also assume that the proton gradient is produced solely by a Q-cycle like the one we've discussed, which pumps 2 protons per electron transferred. (This would imply that the...
Fermentation ALWAYS results in the production of _______________________. acetic acid NADH NAD+ ethanol Which electron acceptor in respiration yields the largest ATP gain? oxygen Fe3+ sulfate hydrogen The electron transport chain uses the energy obtained by redox reactions to create a gradient of _________ that is then used to synthesize ATP. Choose all that apply. CO2 Na+ H2O H+ e- O2 Which of the following metabolic processes use the electron transport chain? Choose all that apply. Anaerobic respiration Kreb's cycle...
What effect does Cyanide have on NAD+ and NADH production in Complex IV of the Electron Transport Chain? Why would cyanide cause High NADH concentrations and low NAD+ concentrations?
Explain what it means if an organism uses Fe3+ as an electron acceptor, as far as where in the ATP producing process this would happen, and what might be a likely reaction and a likely product if it is used as the electron acceptor?
In a cell, why must NADH be reoxidized? How does this happen in an organism that uses respiration? Fermentation? 2. Explain the chemiosmotic mechanism of ATP generation. How does oxidative phosphorylation compare with substrate level phosphorylation found in glycolysis and the Kreb’s cycle? 3. Which of the following yields the greatest energy for a cell: fermentation, anaerobic respiration, or aerobic respiration? Which yields the least? Why? 4. Explain what happens to glucose during glycolysis and respiration in terms of oxidation...
In a cell, why must NADH be reoxidized? How does this happen in an organism that uses respiration? Fermentation? 2. Explain the chemiosmotic mechanism of ATP generation. How does oxidative phosphorylation compare with substrate level phosphorylation found in glycolysis and the Kreb’s cycle? 3. Which of the following yields the greatest energy for a cell: fermentation, anaerobic respiration, or aerobic respiration? Which yields the least? Why? 4. Explain what happens to glucose during glycolysis and respiration in terms of oxidation...
3- Describe the process of electron flow in reverse and explain why many chemolithotrophs use it.
both with reasons!
D1. The reducing power of cytosolic NADH can enter the electron transfer chain via the malate-aspartate shuttle or the glycerophosphate shuttle. Describe why the ATP yield from these two routes differs. (10 marks) OR D2. An inherited mutation can lead to the loss of glucose-6-phosphatase activity Describe how this will affect the functioning of glycolysis and gluconeogenesis, and glycogen storage (10 marks)
D1. The reducing power of cytosolic NADH can enter the electron transfer chain via the...
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A. NADH → electron acceptors → proton gradient → ATP synthase → ATP B. NADH → NAD+ → FADH2 → electron acceptors → ATP C. carbohydrates → acetyl CoA → CO2 → proton gradient → ATP D. NAD+ → NADH → protons → ADP → ATP E. glucose → pyruvate → acetyl CoA → NADH → ATP 2. Facultative anaerobes: A. prefer carbon dioxide. B....
Which of the following is the electron carrier produced in the pentose phosphate pathway? NADH NADPH ubiquinone cytochrome C FADH2