A scientist is studying the metabolic processes carried out by a certain bacterium. Which of the following observations would indicate that the bacterium is performing fermentation?

A.

Carbon dioxide is produced.

B.

Glucose is consumed.

C.

Ethyl alcohol is produced.

D.

Oxygen is consumed.

The correct option is D) Ethyl alcohol is produced.

Explanation:

Fermentation can be described as a process by which energy is extracted by organisms such as bacteria and yeast.

Sugars are converted into alcohol by this metabolic process occurring in certain microorganisms. There are two main types of fermentation:

Fermentation which takes place in the presence of oxygen is termed as aerobic fermentation.

The process of fermentation which occurs in the absence of oxygen is termed as anaerobic respiration.

Hence, as alcohol will be produced from both types of fermentation, optic C is correct.