Bacteria are used by humans for which of the following purposes?

a. bioremediation

c. recycling

b. producing insulin

d. all of the above

The answer is D. Bacteria has been used for bioremediation in order to degrade contaminants. It was also used for recycling various materials already, and even other substances. Some even used certain microorganisms in order to generate insulin, and a lot of research papers have proven that.

B. Producing Insulin

In biotechnology, bacteria are mostly used for making substances for the welfare of Mankind. Mostly biotechnologists use bacteria for producing insulin by different biotechnological methods.