This preview shows page 1. Sign up to view the full content.
Unformatted text preview: form amino acids for protein synthesis. It is also required for synthesis of DNA, RNA, and ATP. Various ways organisms obtain nitrogen: 1. Break down proteins and recycle the amino acids into new proteins and other nitrogenous compounds. 2. Use nitrogen from ammonium ions (NH 4 +) 3. Use nitrogen from nitrates (compounds that dissociate to form nitrate ions NO 3 -4. Use gaseous nitrogen from the atmosphere. Bacteria able to do this are called nitrogen-fixing bacteria. These may live free in the soil, but often they are found within nodules on the roots of legumesplants such as clover, soybeans, etc. This adds nitrogen to the soillike free fertilizer from the air. Rhizobium and Bradyrhizobium are the most important genera....
View Full Document
- Fall '09