Microorganisms Friend And Foe Test

Result

Microorganisms Friend And Foe Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which bacterium does not fix nitrogen?

A
Azotobacter

B
Rhizobium

C
Nitrosomonas

D
Clostridium

Solution

Nitrosomonas do not fix nitrogen; it is a nitrifying bacterium.

Question 2

1 / -0

Select the correct combinations based on the application of microorganisms. ,

Column A	Column B
i.Brewing	a.Microbial decomposition of wastes
ii.Antibiotics	b.Prevention of cholera, TB and hepatitis
iii.Vaccines	Alcohol and wine

i) – b), ii) – a), iii)- d) iv) – c)

i) – c), ii) – d), iii) – a), iv) – b)

i) – c), ii) – b, iii) – d), iv) – a)

i) – d) , ii) – c) iii)-a), iv) - b

Solution

Brewing is the production of alcoholic beverages through fermentation.

Examples of antibiotics are streptomycin and tetracycline.

Manures are formed by decomposition of plant and animal wastes through microbial action.

Vaccines help to prevent several diseases like cholera and TB.

Question 3
1 / -0

In a deep freezer, the temperature is maintained at

A
Below 0°C

B
0°C

C
Below 4°C

D
4°C

Solution

The temperature is usually maintained well below 0°C in a deep freezer.
Question 4
1 / -0

What among the following is used as fertiliser when bacteria decompose sewage?

A
Carbon dioxide

B
Solid waste

C
Soluble substances

D
Sludge

Solution

Sludge undergoes bacterial decomposition which contains essential nutrients (nitrogen and phosphorus) and is potentially beneficial as fertilisers for plants.
Question 5
1 / -0

Antibiotics are used to treat infections in

A
All of these

B
Humans

C
Plants

D
Animals

Solution

Antibiotics are used to control many human, animal and plant diseases.
Question 6
1 / -0

In pasteurisation, milk is boiled at

A
70°C for 15-30 minutes

B
70°C for 10-20 seconds

C
70°C for 10-20 minutes

D
70°C for 15-30 seconds

Solution

In pasteurisation, milk is boiled at 70°C for 15-30 seconds to kill all the bacteria.
Question 7
1 / -0

Against which disease are children protected under Pulse Polio Program?

A
Measles

B
Hepatitis

C
Tuberculosis

D
Polio

Solution

Children are protected against polio disease under Pulse Polio Program
Question 8
1 / -0

Identify the ammonifying bacteria.

A
Nitrosomonas

B
Nitrobacter

C
Bacillus ramosus

D
Clostridium

Solution

Bacillus ramosus is an ammonifying bacterium. When plants and animals die, their proteins are decomposed by ammonifying bacteria to ammonia.
Question 9
1 / -0

Where is the Rhizobium bacteria found in leguminous plants?

A
Stem

B
Root

C
Flowers

D
Leaves

Solution

Rhizobium bacteria is found in the root nodules of leguminous plants such as peas and beans.
Question 10
1 / -0

Which of the following plant diseases is transmitted by seeds?

A
Citrus canker

B
Rust of wheat

C
Yellow vein mosaic of Okra

D
All of the above

Solution

Rust of wheat is a fungal disease in plants and is transmitted by air and seeds.

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Re-Attempt Weekly Quiz Competition

Microorganisms Friend And Foe Test - 4

Result

Microorganisms Friend And Foe Test - 4

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SHARING IS CARING

Question 1

Azotobacter

Rhizobium

Nitrosomonas

Clostridium

Solution

Question 2

i) – b), ii) – a), iii)- d) iv) – c)

i) – c), ii) – d), iii) – a), iv) – b)

i) – c), ii) – b, iii) – d), iv) – a)

i) – d) , ii) – c) iii)-a), iv) - b

Solution

Question 3

Below 0°C

0°C

Below 4°C

4°C

Solution

Question 4

Carbon dioxide

Solid waste

Soluble substances

Sludge

Solution

Question 5

All of these

Humans

Plants

Animals

Solution

Question 6

70°C for 15-30 minutes

70°C for 10-20 seconds

70°C for 10-20 minutes

70°C for 15-30 seconds

Solution

Question 7

Measles

Hepatitis

Tuberculosis

Polio

Solution

Question 8

Nitrosomonas

Nitrobacter

Bacillus ramosus

Clostridium

Solution

Question 9

Stem

Root

Flowers

Leaves

Solution

Question 10

Citrus canker

Rust of wheat

Yellow vein mosaic of Okra

All of the above

Solution

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