Microorganisms: Friend And Foe Mock Tests

26 questions available

Microorganisms: Friend And Foe Mock Test 1

Questions: 26

Sample Questions

Class 8 Science

Which of the following is a natural method of nitrogen fixation?

A Industrial Haber process

B Lightning

C Use of nitrogenous fertilisers

D Legume root nodules (human-assisted)

Class 8 Science

Which non-metal is used in water purification systems to kill bacteria and viruses?

A Nitrogen

B Chlorine

C Carbon

D Sulphur

Class 8 Science

Which of the following pairs correctly matches a microorganism with its category?

A Amoeba — fungus

B E. coli — bacterium

C Paramecium — alga

D Chlamydomonas — protozoan

Class 8 Science

Which of the following is a role of green plants in the carbon cycle?

A They release carbon dioxide during respiration

B They absorb CO₂ during photosynthesis

C They decompose organic matter

D They produce methane in swamps

Class 8 Science

Rhizobium bacteria live in the root nodules of which type of plants?

A Wheat

B Tomato

C Gram (chickpea)

D Rice

Class 8 Science

Which of the following microorganisms is used in the production of alcohol?

A Lactobacillus

B Saccharomyces

C Rhizobium

D Bacillus subtilis

Class 8 Science

Rhizobium bacteria are found in the root nodules of which plant family?

A Grasses

B Legumes

C Rose family

D Solanaceae

Class 8 Science

Which of the following is a bacterium?

A Amoeba

B E. coli

C Paramecium

D Chlamydomonas

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