1. GLYCOLYSIS
2. KREBS CYCLE
3. ELECTRON TRANSPORT CHAIN
They say how an enzyme perfectly fits into its substrate is alike a "lock and key".
Only one specific enzyme can fit a specific substrate.
The best description about the brain stem is: it is the most important organ of our body's survival. It connects the brain and the spinal cord, controls the vital organs like the lungs and heart and it also coordinates the many essential body reflexes.
Answer:
No harm upon ecosystems or the environment, prevention of any harmful contributions to air, water and land pollution.
