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Q. No.

Decomposition of organic nitrogen of dead plants and animals into ammonia is called

(1) Nitrogen Fixation

(2) Ammonification

(3) Nitrification

(4) Denitrification

Subtopic:  Ammonia Assimilation & Nitrogen Export |
 87%
Level 1: 80%+
Hints

Which of the type of fixation leads to fixation of atmospheric nitrogen to ammonia?

(1) Biological nitrogen fixation

(2) Industrial nitrogen fixation

(3) Electrical nitrogen fixation

(4) Both A and B

Subtopic:  Ammonia Assimilation & Nitrogen Export |
 75%
Level 2: 60%+
Hints

Ammonia is first oxidized to nitrite by the bacteria except

(1) Nitrosomonas

(2) Nitrococcus

(3) Nitrobacter

(4) All of these

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
 82%
Level 1: 80%+
Hints
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Nitrite is oxidized to Nitrate by the bacterium

(1) Nitrococcus

(2) Nitrosomonas

(3) Nitrobacter

(4) Thiobacillus

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
 92%
Level 1: 80%+
Hints

The nitrifying bacteria are

1. Photoautotroph 2. Chemoautotroph
3. Nitrotroph 4. Organotroph
Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
 95%
Level 1: 80%+
Hints

Denitrification occurs in

(1) Leaves

(2) Roots

(3) Soil

(4) Environment

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen Metabolism:2 | Nitrogen metabolism | Nitrogen Metabolism |
 65%
Level 2: 60%+
Hints
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Plants absorb which form of Nitrogen?

(1) Ammonia

(2) Nitrate

(3) Nitrite

(4) Nitrogen

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
 83%
Level 1: 80%+
Hints

The reduction of absorbed nitrate occurs

1. In leaves 2. In roots
3. In soil 4. In air
Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
 68%
Level 2: 60%+
Hints

Denitrification is

(1) Reduction of nitrate to nitrite

(2) Reduction of nitrate to nitrogen

(3) Reduction of nitrous to nitrite

(4) Reduction of nitrogen to ammonia

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen Metabolism:2 | Nitrogen metabolism | Nitrogen Metabolism |
 84%
Level 1: 80%+
Hints
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Denitrification is carried by

(1) Pesudomonas

(2) Thiobacillus

(3) Nitrobacter

(4) Both A and B

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen Metabolism:2 | Nitrogen metabolism | Nitrogen Metabolism |
 95%
Level 1: 80%+
Hints
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