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Microorganisms Book Back Questions 8th Science Lesson 16

8th Science Lesson 16

16] Microorganisms

Book Back Questions with Answer and Do You Know Box Content

Choose the best answers:

1. Microorganisms are measured in ______________.

(a) cm

(b) mm

(c) micron

(d) meter

2. ______________ shows both living and nonliving characteristics.

(a) Protozoa

(b) Virus

(c) Bacteria

(d) Fungi

3. _______________ is a prokaryotic microorganism.

(a) Virus

(b) Algae

(c) Fungi

(d) Bacteria

4. Based on shape, the bacteria are classified into ______________ types.

(a) Two

(b) Three

(c) Four

(d) Five

5. Common cold in human is caused by ____________

(a) Plasmodium

(b) Influenza

(c) Vibrio cholera

(d) Aphthovirus

Fill in the blanks:

1. ______________ is prepared from a mould called penicillium.

2. ______________ are the infectious protein particles.

3. The infecting virus particle found outside the host cell is _______________.

4. Microorganism can be seen with the help of a _________________.

5. Bacteria, which has a flagellum at one end is classified as _____________.

State true or false. If false, correct the statement:

1. Disease causing microorganisms are called pathogens.

2. Female anopheles mosquito is a carrier of dengue virus.

3. Chicken pox is a communicable disease.

4. Citrus canker is transmitted by insects.

5. Yeast is used in the large scale production of alcohol.

Match the following:

1. Nitrogen fixing bacteria – vaccine

2. Tuberculosis – prion

3. Kuru – lactobacillus acidophilus

4. Probiotics – bacteria

5. Edward Jenner – rhizobium

Answers:

Choose the best answers:

1. micron 2. Virus 3. Bacteria 4. 4 5. Influenza

Fill in the blanks:

1. Penicillin 2. Prions 3. Virion 4. Microscope 5. Monotrichous

State true or false. If false, correct the statement:

1.True

2.False

Correct answer: Female anopheles’ mosquito is a carrier of mosquito virus

3.True

4.True

5.True

Match the following:

1.Nitrogen fixing bacteria – Rhizobium

2.Tuberculosis – Bacteria

3.Kuru – Prion

4.Probiotics – Lactobacillus acidophilus

5.Edward Jenner- Vaccine

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