Multiple Choice
Under anaerobic conditions (a lack of oxygen), the conversion of pyruvate to acetyl-CoA stops. Which of the following best explains why this occurs?
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8. Respiration
Fermentation & Anaerobic Respiration
Multiple Choice
Which of the following is produced during the pathway of alcoholic fermentation?
A
Lactic acid
B
Carbon dioxide (\(\mathrm{CO_2}\))
C
Ethanol
D
Oxygen (\(\mathrm{O_2}\))
Verified step by step guidance1
Understand the concept of alcoholic fermentation: It is a biological process in which sugars such as glucose are converted into ethanol and carbon dioxide (\(\mathrm{CO_2}\)) by the action of yeast or certain bacteria under anaerobic conditions (absence of oxygen).
Identify the key products of alcoholic fermentation: Ethanol and carbon dioxide (\(\mathrm{CO_2}\)) are the main products, while lactic acid is produced in a different pathway called lactic acid fermentation.
Recognize the role of oxygen (\(\mathrm{O_2}\)): Alcoholic fermentation occurs in anaerobic conditions, meaning oxygen (\(\mathrm{O_2}\)) is not involved or produced in this process.
Compare alcoholic fermentation with lactic acid fermentation: Lactic acid fermentation produces lactic acid as the end product, whereas alcoholic fermentation produces ethanol and carbon dioxide (\(\mathrm{CO_2}\)).
Conclude that the correct products of alcoholic fermentation are ethanol and carbon dioxide (\(\mathrm{CO_2}\)), and oxygen (\(\mathrm{O_2}\)) and lactic acid are not produced in this pathway.
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