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Microorganisms

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Where do viruses reproduce?

  1. Inside water

  2. Inside plant and animal cell

  3. In damp mud

  4. On dead plants and animals

  5. In air


Correct Option: B
Explanation:

Yes, it is correct. Viruses reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal.

Which of the following is/are types of microorganisms? Bacteria, Virus, Protozoa, Fungi, Algae, Archaea

  1. Bacteria and virus

  2. Virus and protozoa

  3. Protozoa and fungi

  4. Agae and archaea

  5. All of these


Correct Option: E
Explanation:

Yes, it is the correct answer. Microorganisms are divided into six types: bacteria, archaea, protozoa, algae, fungi, and viruses.

Which of the following microorganisms lives in colonies?

  1. Amoeba

  2. Fungi

  3. Algae

  4. Fungi and algae

  5. All of these


Correct Option: D
Explanation:

Yes, both of them live in colonies.

Microorganisms can exist as____________.

  1. unicellular

  2. multicellular

  3. cell clusters

  4. unicellular or multicellular

  5. unicellular, multicellular or cell clusters


Correct Option: E
Explanation:

Yes, it is the correct answer. Microorganisms can exist as unicellular, multicellular or cell clusters.

Microorganisms cannot survive under

  1. ice cold condition

  2. hot springs

  3. deserts

  4. marshy lands

  5. none of these


Correct Option: E
Explanation:

As they can survive under all types of environment, ranging from ice cold climate to hot springs and deserts to marshy lands, so all are correct. Hence, this is the correct answer.

Which of the following is not an antibiotic?

  1. Streptomycin

  2. Tetracycline

  3. Aspirin

  4. Erythromycin

  5. Penicillin


Correct Option: C
Explanation:

Yes, it is the correct answer as aspirin is an analgesic medicine, not an antibiotic.

By putting grape juice into a container at the right temperature, yeast will turn ___________ into alcohol and carbon dioxide.

  1. the grapes

  2. the acid in the juice

  3. the sugar in the juice

  4. the sulphur dioxide present

  5. yeast does not play any role in making alcohol


Correct Option: C
Explanation:

Yes, the yeast will turn the sugar in the juice into alcohol and carbon dioxide.

Whenever one falls ill, the doctor may give us some antibiotic tablets, capsules or injections such as penicillin. The source of these medicines is ________________.

  1. plants

  2. minerals

  3. animals

  4. microorganisms

  5. water


Correct Option: D
Explanation:

Yes, the source of these medicines is microorganisms.

The microbes commonly called biological nitrogen fixers are found in _____________________.

  1. leaves of plants

  2. root nodules of leguminous plants

  3. waste and dead plants

  4. air

  5. soil


Correct Option: B
Explanation:

Yes, it is the correct answer as the microbes reside in the root nodules of leguminous plants. They can fix nitrogen from the air into soil and increase the soil fertility.

Some of the microorganisms cause diseases in human beings, plants and animals. Such disease-causing microorganisms are called _______.

  1. commensals

  2. pathogens

  3. biological nitrogen fixers

  4. antibodies

  5. none of these


Correct Option: B
Explanation:

Yes, disease-causing microorganisms are called pathogens.

Which of the following diseases cannot be prevented by vaccination?

  1. Cholera

  2. Tuberculosis

  3. Smallpox

  4. Hepatitis

  5. Diarrhea


Correct Option: E
Explanation:

No, diarrhea cannot be prevented by vaccination. Proper hygiene can prevent it.

Which of the following is an air borne disease?

  1. Cholera

  2. Typhoid

  3. Malaria

  4. Hepatitis B

  5. Measles


Correct Option: E
Explanation:

Yes, it is correct. Measles is air borne disease.

Which of the following is the odd one out?

  1. Cholera

  2. Measles

  3. Chicken pox

  4. Polio

  5. Hepatitis B


Correct Option: A
Explanation:

Yes, it is the correct answer. All other diseases are caused by virus, whereas cholera is caused by bacteria.

Food preservation can be done by using ________________.

  1. common salt

  2. sugar

  3. edible oil

  4. vinegar

  5. all of these


Correct Option: E
Explanation:

Yes, it is the correct answer.

Anthrax, a dangerous disease, is caused by bacterium in ____________. (a) cattle (b) human (c) plants (d) all animals

  1. Only a

  2. Only b

  3. Both a and b

  4. Only c

  5. Both b and d


Correct Option: C
Explanation:

Yes, it is the correct answer. It is both a cattle and human disease.

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