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Micro Organisms and Their Classification

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Those organisms that feed on decaying organic matter are known as ________________.

  1. parasites

  2. omnivorous

  3. carnivorous

  4. herbivorous

  5. saprophytes


Correct Option: E
Explanation:

Saprophytes feed on decaying organic matter.

Multicellular fungi are made of microscopic threads. These are known as _________.

  1. hair

  2. hyphae

  3. threads

  4. nodules

  5. None of these


Correct Option: B
Explanation:

Multicellular fungi are made of microscopic threads. These are known as hyphae.

Which of the following microbes do not possess cell organelles?

  1. Bacteria

  2. Virus

  3. Fungi

  4. Algae

  5. Protozoans


Correct Option: B
Explanation:

Virus do not possess cell organelles.

Which of the following organisms are the smallest of all?

  1. Fungi

  2. Bacteria

  3. Virus

  4. Protozoans

  5. Algae


Correct Option: C
Explanation:

Viruses are the smallest of all organisms.

Which of the following is not a major group of Micro-organisms?

  1. Bacteria

  2. Yeast

  3. Algae

  4. Protozoan

  5. Virus


Correct Option: B
Explanation:

Yeast is not a 'GROUP' of micro-organisms, its rather a type of Fungi.

What is the external coating of a Virus made up of?

  1. Mono-saccharides

  2. Fat

  3. Vitamin

  4. Carbohydrates

  5. Proteins


Correct Option: E
Explanation:

The external coating of a Virus is made up of proteins.

Which of the following microbes require a host body to multiply?

  1. Algae

  2. Protozoa

  3. Fungi

  4. Virus

  5. Bacteria


Correct Option: D
Explanation:

Viruses require a host body to multiply. They cannot multiply on their own.

Which of the following pair is INCORRECT?

  1. Yeast - Unicellular fungus

  2. Bread mould - multicellular fungus

  3. Chlamydomonas - Unicellular algae

  4. Trypanosoma - Virus

  5. Plasmodium - Protozoan


Correct Option: D
Explanation:

Trypanosoma is not a Virus. It is a protozoan. Hence, this pair is incorrect.

Amoeba is generally seen in ___________.

  1. tap water

  2. stagnant water

  3. sand

  4. flowing water

  5. air


Correct Option: B
Explanation:

Amoeba is generally seen in stagnant water.

Bread mould is responsible for _____________.

  1. spoiling of bread

  2. curd formation

  3. rotting of eggs

  4. formation of cheese

  5. none of the above


Correct Option: A
Explanation:

Bread mould is responsible for spoiling of bread.

Which of the following is WRONG with respect to the Protozoans?

  1. They are unicellular

  2. Cannot prepare there own food

  3. Amoeba is a protozoan

  4. They may be unicellular or multicellular

  5. They can reproduce


Correct Option: D
Explanation:

This statement is false, as they are only unicellular.

Algae live in ___________.

  1. moist places

  2. dry places

  3. forests

  4. hot places

  5. cold places


Correct Option: A
Explanation:

Algae live in moist places.

Which of the following is a multicellular Algae?

  1. Paramecium

  2. Trypanosoma

  3. Plasmodium

  4. Aspergillus

  5. Spirogyra


Correct Option: E
Explanation:

Spirogyra is a multicellular Algae.

Which was the first micro-organism to be discovered?

  1. Virus

  2. Fungi

  3. Protozoan

  4. Bacteria

  5. Algae


Correct Option: D
Explanation:

Bacteria was the first micro-organism to be discovered.

Which of the following is TRUE with respect to the Bacteria?

  1. It can be unicellular or multicellular

  2. It is larger than viruses

  3. It has two major forms

  4. It feeds on dead leaves

  5. None of these


Correct Option: B
Explanation:

Bacteria is larger than viruses. Hence, this option is correct.

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