Question

which is a similarity between alcohol fermentation and aerobic respiration?
both require oxygen.
both require light energy.
both start with glycolysis.
both produce alcohol.

Explanation:

• Alcohol fermentation is an anaerobic process (does not require oxygen), while aerobic respiration requires oxygen. So the option "Both require oxygen" is incorrect.
• Neither alcohol fermentation nor aerobic respiration requires light energy. Photosynthesis requires light energy. So the option "Both require light energy" is incorrect.
• Alcohol fermentation produces alcohol (and carbon dioxide), while aerobic respiration produces carbon dioxide and water. So the option "Both produce alcohol" is incorrect.
• Both alcohol fermentation and aerobic respiration start with glycolysis. Glycolysis is the first stage of breaking down glucose. In aerobic respiration, after glycolysis, the products enter the Krebs cycle and electron - transport chain (in the presence of oxygen). In alcohol fermentation, after glycolysis, pyruvate is converted into ethanol and carbon dioxide (in the absence of oxygen).

Answer:

Both start with glycolysis.