Question

Match column I and column II.
Column I Column II

A.	Aspergillus niger	I.	Ethanol
B.	Clostridium butylicum	II.	Citric acid
C.	Saccharomyces cerevisiae	III.	Cyclosporin A
D.	Trichoderma polysporum	IV.	Butyric acid

• A. A-IV, B-III,C-II, D-I
• B. A-I, B-II, C-IV, D-III
• C. A-II, B-IV, C-I, D-III
• D. A-III, B-II, C-IV, D-I

Answer 1

The correct option is C A-II, B-IV, C-I, D-III

Micro-organisms are used commercially to synthesise many products useful for human beings. They are used in the production of chemicals, enzymes, antibiotics, breweries etc.

Aspergillus niger, a fungus, is used in the production of organic acid-citric acid.

Clostridium butylicum is used in the production of butyric acid.

Saccharomyces cerevisiae is used in the commercial production of ethanol.

Trichoderma polysporum, a fungus, is involved in the production of a bioactive agent, cyclosporin A. This is used as an immunosuppressive agent for organ-transplant patients.