A group of your colleagues has collected disused lab equipment in a storage closet, with the intention of brewing their own hard cider for parties after work. After carefully sterilizing their equipment, they add apple juice, table sugar, and a bacterial culture derived from fermenting yogurt to several large bottles, leaving each half empty, then turn off the lights, lock the closet, and wait. After checking a week later, your colleagues are disappointed to discover that the contents of their bottles are not fit for human consumption. What mistake did they make?

a. Without light, the fermentation process was unable to begin.
b. Air in the bottles caused the apple juice to oxidize and decompose.
c. Bacteria perform lactic acid fermentation, not alcohol fermentation.
d. Alcohol fermentation will not occur without a constant heat source.


c. Bacteria perform lactic acid fermentation, not alcohol fermentation.

Biology & Microbiology

You might also like to view...

Which type of leukocyte contains heparin, an anticoagulant?

a. neutrophils b. basophil c. monocytes d. eosinophils e. megakaryocytes

Biology & Microbiology

The disease anthrax is caused by a species belonging to which genus?

A. Bacillus B. Ehrlichia C. Kingella D. Vibrio

Biology & Microbiology

After plant mitosis, the vesicles fuse into a disk-shaped __________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Photosynthesis produces more water than it uses

Indicate whether the statement is true or false

Biology & Microbiology