Explain how NAD+ is replenished in animals under anaerobic conditions.
Explain how NAD+ is replenished in yeast cells under anaerobic conditions.
Explain how NAD+ is replenished in animals under anaerobic conditions. Explain how NAD+ is replenished in...
Show how NADH is recycled to NAD+ under anaerobic conditions. Why is it important to recycle NADH produced during glycolysis to NAD+?
A suspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. Adding an inhibitor of alcohol dehydrogenase to the yeast cell suspension results in rapid cell death. Why? a.) Without alcohol dehydrogenase, the acetaldehyde concentration increases to levels that are toxic to the yeast cells. b.) NADH generated during glycolysis cannot be recycled back to NAD+, thus anaerobic ATP production through glycolysis cannot be maintained. c.) Pyruvate is no longer...
In yeast, ethanol is produced from glucose under anaerobic
conditions. A cell‑free yeast extract is placed in a solution that
contains glucose....
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In yeast, ethanol is produced from glucose under anaerobic conditions. A cell-free yeast extract is placed in a solution that contains 3.00 x 10 mmol glucose, 0.40 mmol ADP, 040 mmol P. 0.80 mmol ATP, 0.20 mmol NAD*, and 0.20 mmol NADH. It is kept under anaerobic conditions. What is the maximum amount of ethanol (in...
In skeletal muscle under anaerobic conditions, pyruvate is further reduced to lactate. What is the net equation for the payoff phase of glycolysis? glyceraldehyde-3-phosphate + 2 ATP + Pi ---> lactone + NAD+ glucose+2ATP ---> 2Glyceraldehyde-3-Phosphate + 2ADP + 2H+ 2glyceraldehyde-3-phosphate + 4ADP + 2Pi >2Lactate + 4ATP None of the above
the reaction, acetaldehyde + NADH + H+ --> ethanol + NAD+, occurs during? 1. aerobic catabolism of glucose 2.preparation phase of glycolysis 3. anaerobic catabolism of glucose in muscle cells 4. anaerobic catabolism of glucose in yeast
We have discussed fermentation as a mechanism for regeneration of NAD for glycolysis under conditions when an ETC is not available for NAD regeneration. Embden-Meyerhof glycolysis converts one NAD to NADH for each molecule of pyruvate produced. Fermentation of pyruvate to propionic acid converts one NADH to NAD for each molecule of pyruvate fermented. Which of the following statements is TRUE of metabolism under conditions that force the use of pyruvate fermentation to propionate? It should be possible to perform...
6. A yeast variant was discovered that had a shorter glycolytic pathway. This "mutant" yeast made a novel enzyme that catalyzed the following reaction: Glyceraldehyde-3-phosphate + H2 + NAD → 3-phosphoglycerate + NADH+H* A. Would you expect this novel yeast strain to grow well under anaerobic conditions using glucose as a carbon source? Explain. B. Would you expect this novel yeast strain to grow well under aerobic conditions using glucose as a carbon source? Explain.
What is fermentation? Under what conditions does it occur? What is its purpose? Describe the major differences between anaerobic and aerobic respiration in terms of reactions, products, and energy yield. Yeast is capable of both aerobic and anaerobic respiration, but frequently performs anaerobic respiration regardless of the oxygen content of its environment. What advantage might this provide the yeast?
under anaerobic conditions, i.e. during vigorous exercise, when hemoglobin is not able to supply adequate amounts of oxygen to your tissues, your muscles accumulate lactate derived pyruvate. This reaction is very favorable, thus the reversal would not be favorable. However, in the liver the reaction can easily be reversed and lactate can serve as a substrate for gluconeogenesis. Explain how this is accomplish
| ATP hydrogen lactate oxygen water anaerobic fermentation NAD+ aerobic pyruvate but may continue in 10. The complete breakdown of glucose requires anaerobic conditions through the process of formed by glycolysis accepts two 11. During this process, the atoms and is reduced to 12. This reaction regenerates which can then pick up more electrons to keep glycolysis and production going conditions, like when we 13. Fermentation is a way to produce ATP during use our muscles rigorously.