6. True or false? Alcohol dehydrogenase catalyses the final step in fermenting e
ID: 275536 • Letter: 6
Question
6. True or false? Alcohol dehydrogenase catalyses the final step in fermenting ethanol. 7. In aerobic metabolism, what is the fate of pyruvate produced by glycolysis? a. It loses carbon dioxide, producing acetaldehyde, which in turn is reduced to ethanol. b. It loses carbon dioxide, producing acetaldehyde, which in turn is reduced to oxaloacetate. It loses carbon dioxide, and the remaining two carbon atoms become linked to coenzyme A. c. d. It is reduced to lactate e. None of the above. True or False: Biochemistry is the study of chemical reactions in living organisms. True or False? In terms of carbon atoms, the net reaction of glycolysis is: Input one 6 8. 9. carbon molecule, output two 3 carbon molecules. 10. True or False? Alcohol fermentation takes place under aerobic conditions. 11. In humans, pyruvate can be converted to: a. acetyl-CoA only b. lactate only. c. ethanol only d. acetyl CoA and ethanol. e. acetyl-CoA and lactate.Explanation / Answer
Answer:
6). True
Explanation:
In anaerobic respiration, glucose will be converted to pyruvate. The pyruvate is first converted into acetaldehyde by pyruvate decarboxylase and the acetaldehyde is converted into alcohol by alcohol dehydrogenase.
7). C. It loses carbon dioxide, and the remaining two carbon atoms become linked to coenzyme A
Explanation:
Pyruvate+Coenzyme-A--------------Acetyl-CoA + CO2
8). True
9). True
Explanation:
Glucose (6C) is converted into two molecules of pyruvate (3C) in glycolysis.
10). False
Explanation: Fermentation occurs only in the absence of oxygen. In other words, fermentation is anaerobic respiration.
11). e. Acetyl-CoA and lactate
Explanation: In humans during aerobic conditions, pyruvate is converted into acetyl-CoA. During anaerobic conditions, pyruvate is converted into lactate.
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