Question

Following points are correct about microorganisms except

I. Microorganisms are used as food preservatives.

II. Microorganisms increase soil fertility.

III. Microorganisms are used to make antibiotics.

IV. Some Microorganisms clean the environment.

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

Answer 1

The correct option is D

I,II,IV

Some bacteria are able to fix nitrogen from the atmosphere to enrich soil with nitrogen and increase its fertility. The microorganisms decompose dead organic waste of plants and animals converting them into simple substances. Penicillin is an antibiotic which kills or stops growth of the disease causing microorganisms. Antibiotics are produced from bacteria and fungi.