Advertisements
Advertisements
प्रश्न
How is nitrogen replenished in atmosphere.
Advertisements
उत्तर
Nitrogen is replenished in the atmosphere by the process of denitrification. Decomposers or dentrifying bacteria, such as Pseudomonas, reduce nitrates back to nitrogen or ammonia or some other oxides. Free nitrogen returns to the atmospheric pool, and oxides are taken up by the plants.
APPEARS IN
संबंधित प्रश्न
Write a note on nitrogen fixation?
Write the role of nitrogenase enzyme in nitrogen fixation?
When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?
In the nitrogen cycle, which of the following play an important role?
Match Column - I with Column - II.
| Column - I | Column - II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below.
The blue-green algae that take part in nitrogen fixation are also called ______.
Nitrogen is an essential component of protein, DNA, and chlorophyll.
Name the cell which is responsible for nitrogen fixation in cyanobacteria.
Consider the following statements. Which of the statements given below is incorect?
Match column I with Column II.
| Column I | Column II |
| A Acidic | (i) Phenylalanine (Phe) |
| B Neutral | (ii) Cysteine (Cys) |
| C Aromatic | (iii) Valine (Val) |
| D S(Sulphur) containing | (iv) Asparagine (Asn) |
Select the correct answer from the options given below.
