Question

lactic acid fermentation occurs in

○ bread dough
○ any environment containing oxygen
○ muscle cells
○ mitochondria

Explanation:

Lactic - acid fermentation occurs in muscle cells during strenuous exercise when oxygen is limited. In bread dough, alcoholic fermentation by yeast is more common. Fermentation is an anaerobic process, so it doesn't occur in oxygen - rich environments. Mitochondria are the sites of aerobic respiration, not lactic - acid fermentation.

Answer:

C. Muscle cells