Microorganisms

Who discovered fermentation?

• Louis Pasteur

• Edward Jenner

• Both of these together

• None of these

Which among is not a situation where microorganisms act as a friend?

• Making of curd

• Bread making

• Decomposing the waste

• Rusting of wheat

Which of the following is a disease caused by protozoans?

• Malaria

• Tuberculosis

• Influenza

• None of these

Some plants have nitrogen-fixing bacteria in their root nodules. What are these bacteria called?

• Azotobacter

• Nitrosomonas

• None of these

• Rhizobium

Vaccines are made up of:

• Chemicals

• Weak microorganisms

• Viruses

• Drugs

Amount of nitrogen in the atmosphere is..........

• 58%

• 88%

• 78%

• 68%

Microorganisms are...................

• Unicellular

• None of these

• Multi-cellular

• Both

Disease causing microbes are called as........

• Antibodies

• Antibiotics

• Carriers

• Pathogens

Name the chemical preservative used for the chemical preservation.

• Sodium benzoate

• Oil

• Phosphorous

• Iron oxide

Pathogenic microbes that enter our body are killed by special chemicals known as

• Antibodies

• Sodium chloride

• Antibiotics

• None of these