Anabolism and catabolism are two parts of metabolism. They work together to keep the body alive and balanced.
Anabolism
- It is the building-up process.
- Small molecules join to make larger ones.
- It uses energy (needs ATP).
- Helps in growth, repair, and storage.
Examples: Making proteins from amino acids, making fats from fatty acids, making glycogen from glucose.
Catabolism
- It is the breaking-down process.
- Large molecules are broken into smaller ones.
- It releases energy (produces ATP).
- Helps in energy supply and waste removal.
Examples: Breaking down glucose for energy, digesting food, breaking down fats.
In short:
- Anabolism = builds up and uses energy
- Catabolism = breaks down and gives energy
Both are needed for life — catabolism provides energy, and anabolism uses that energy to build and repair the body.