Multiple Choice Questions on Biopesticide and Biofertilizers | Microbes in Human Welfare

1. Which vegetable crops use large amounts of nitrogen fertilizer?

A) Leaf

B) Root

C) Fruit

D) All of these


2. The following crop is used in phytoremediation

A) Mustard

B) Wheat

C) Rice

D) Sugarcane


3. Insecticide that remains active in the environment for the longest period of time

A) Organophosphates

B) Chlorinated hydrocarbons

C) Carbonyles

D) None of these


4. Which among the following is not an organophosphates pesticide?

A) Parathion

B) Malathion

C) Methyl parathion



5. Tectona grandis shed leaves during

A) Winter

B) Summer

C) Before flowering

D) After fruiting



6.The nucleopolyhedrovirus viruses (NPV) are widely used as a biopesticide for the control of:

A) Culex larvae

B) Bollworm

C) Aphids

D) Citrus mites


7. Which among the following is a pest of paddy?

A) Cosmopolites sordidus

B) Rhynchophorus ferrugineus

C) Dicladispa armigera

D) Opisina arenosella


8. An organism used as a biofertilizer for raising soybean crop is

A) Azotobacter

B) Azospirillum

C) Rhizobium

D) Nostoc.


9. Select the mismatch.

A) Rhodospirillum -Mycorrhiza

B) Anabaena -Nitrogen fixer

C) Rhizobium -Alfalfa

D) Frankia-Alnus

Multiple Choice Questions on Biopesticide and Biofertilizers  Microbes in Human Welfare

10. A nitrogen-fixing microbe associated with Azolla in rice fields is

A) Spirulina

B) Anabaena

C) Frankia

D) Tolypothrix.


11. Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition?

A) Azotobacter

B) Aspergillus

C) Glomus

D) Trichoderma


12. A prokaryotic autotrophic nitrogen-fixing symbiont is found in

A) Alnus

B) Cycas

C) Cicer

D) Pisum.


13. Which one of the following helps in the absorption of phosphorus from the soil by plants?

A) Glomus

B) Rhizobium


D) Anabaena


14. Which one of the following is not a biofertilizer?

A) Agrobacterium

B) Rhizobium

C) Nostoc

D) Mycorrhiza


15. The biofertilizers are

A) Anabaena and Azolla

B) Cow dung, manure and farmyard waste

C)quick-growing crop plowed, under the soil

D) Mycorrhiza 

Learn more:


1. A) Leaf

2. A) Mustard

3. B) Chlorinated hydrocarbons

4. D) DDT

5. B) Summer

6. B) Bollworm

7. C) Dicladispa armigera

8. C) Rhizobium

9. A) Rhodospirillum -Mycorrhiza

10. B) Anabaena

11. C) Glomus

12. B) Cycas

13. A) Glomus

14.A Agrobacterium

15. A) Anabaena and Azolla

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