Answer:
1. Nitrogenase
2. converted, nitrification
3. Decayed, ammonification
4. Denitrification
5. nitrite reductase
Explanation:
The nitrogen cycle refers to the series of processes that adds and removes nitrogen from the soil or atmosphere. The series of processes involved in nitrogen cycle are being described in this question as follows:
- Atmospheric Nitrogen (N2) is converted to NH3 (ammonia) in a process catalyzed by the enzyme NITROGENASE in a process called nitrogen-fixation.
- NH4+ (ammonium ion) is converted to NO2- (nitrite) and then NO3- (nitrate) in a process called NITRIFICATION.
- Atmospheric nitrogen (N2) is decomposed or broken down to NH4+ (ammonium ions) as a result of a process called AMMONIFICATION.
- Nitrate is converted to atmospheric nitrogen (N2) in a process called DENITRIFICATION.
- Nitrite conversion to ammonium ion (NH4+) is catalyzed by an enzyme called NITRITE REDUCTASE