By which process does yeast produce the carbon dioxide responsible for bread rising?

Question

a. photosynthesis
b. dehydration synthesis
c. cellular respiration
d. glycolysis

Answer 1

The correct answer is c. cellular respiration.

Yeast produces carbon dioxide through a process called fermentation, a type of anaerobic cellular respiration. During fermentation, yeast converts sugars into alcohol and carbon dioxide, which is what causes the bread to rise.