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Microorganisms Friend and Foe MCQs | Microorganisms Friend and Foe Multiple Choice Questions and Answers

(1) Name the Living organism which we cannot seen by naked eye.
[A] Microorganisms
[B] Lyophobic organisms
[C] Chromic organisms
[D] Fermentation
Answer: Microorganisms
(2) Name the microorganisms which require host cells to reproduce and complete their life cycle.
[A] Virus
[B] Fungi
[C] Bacteria
[D] Algae
Answer: Virus

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(3) Penicillium and Aspergillus are examples of __________
[A] Fungi
[B] Bacteria
[C] Algae
[D] None
Answer: Fungi
(4) The yeast multiply by a process called
[A] Budding
[B] Spore formation
[C] Binary fission
[D] None of these
Answer: Budding
(5) The following is an antibiotics
[A] Sodium bicarbonate
[B] Streptomycin
[C] Alcohol
[D] Yeast
Answer: Streptomycin
(6) The algae commonly used as fertilizers are called
[A] Blue green algae
[B] Diatoms
[C] Staphylococcus
[D] None of these
Answer: Blue green algae
(7) The bread dough rises because of
[A] Heat
[B] Growth of yeast cells
[C] Kneading
[D] None of these
Answer: Growth of yeast cells
(8) The vaccine for smallpox was discovered by
[A] Edward Jenner
[B] Sir Ronald Ross
[C] Robert Koch
[D] None of these
Answer: Edward Jenner
(9) The bacterium which promote the formation of curd
[A] Breadmould
[B] Lactobacillus
[C] Rhizobium
[D] Spirogyra
Answer: Lactobacillus
(10) The bacterium Bacillus Anthracis was discovered by
[A] Louis Pasteur
[B] Edward Jenner
[C] Robert Koch
[D] None of these
Answer: Robert Koch
(11) Carrier of malaria causing protozoan is
[A] Female Anopheles Mosquito
[B] Cockroach
[C] Butterfly
[D] Housefly
Answer: Female Anopheles Mosquito
(12) The process of conversion of sugar into alcohol is called
[A] Fermentation
[B] Nitrogen fixation
[C] Infection
[D] None of above
Answer: Fermentation
(13) Which of the following is not a fungi
[A] Bread mould
[B] Penicillium
[C] Aspergillus
[D] Paramecium
Answer: Paramecium
(14) Which of the following reproduces only inside a host cell?
[A] Virus
[B] Bacteria
[C] Fungus
[D] Amoeba
Answer: Virus
(15) The two micro-organisms which live in symbiotic association in lichens are
[A] alga and fungus
[B] fungus and protozoa
[C] bacteria and protozoa
[D] alga and bacteria
Answer: alga and fungus
(16) The disease caused by a protozoan and spread by an insect is _________.
[A] Malaria
[B] Measles
[C] Dengue
[D] Polio
Answer: Malaria
(17) Paheli dug two pits, A and B, in her garden. In pit A, she put a polythene bag packed with some agricultural waste. In pit B, she dumped the same kind of waste but without packing it in a polythene bag. She, then covered both the pits with soil. What did she observe after a month?
[A] Waste in pit B degraded faster than that in pit A
[B] Waste in pit A degraded faster than that in pit B
[C] Waste in both pits degraded almost equally
[D] Waste in both pits did not degrade at all
Answer: Waste in pit B degraded faster than that in pit A
(18) Name the single celled microorganism which found in glacier to deserts and hot spring.
[A] Bacteria
[B] Virus
[C] Algae
[D] None
Answer: Bacteria
(19) Name the multicellular, heterotrophic microorganisms which found in colonies.
[A] Fungi
[B] Algae
[C] Bacteria
[D] Virus
Answer: Fungi
(20) Name the unicellular or multicellular autotrophic microorganism.
[A] Protozoa
[B] Fungi
[C] Algae
[D] None of these
Answer: Algae

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