Question

products of fermentation such as lactic acid or ethanol are toxic to the cells that produce them. why, then do cells carry out fermentation?
options:

• fermentation produces atp and co2
• fermentation produces oxygen.
• fermentation produces atp without oxygen
• fermentation produces more glucose.

Explanation:

To determine why cells carry out fermentation despite toxic products, we analyze each option:

• "Fermentation produces ATP and CO₂": While some fermentations (like alcoholic) produce CO₂, the key benefit for cells is ATP production without oxygen, and this option doesn't emphasize the "without oxygen" aspect which is crucial for anaerobic conditions.
• "Fermentation produces oxygen": Fermentation is an anaerobic process and does not produce oxygen (photosynthesis does), so this is incorrect.
• "Fermentation produces ATP without Oxygen": Fermentation is a metabolic pathway that allows cells to generate ATP (energy) in the absence of oxygen. Even though the by - products (lactic acid, ethanol) are toxic, the production of ATP (which is essential for cell functions) in anaerobic conditions makes it necessary.
• "Fermentation produces more glucose": Fermentation breaks down glucose, it does not produce more glucose.

Answer:

C. Fermentation produces ATP without Oxygen (assuming the option labels are A, B, C, D with C being "Fermentation produces ATP without Oxygen")