Catabolism
Digestion.
The process that breaks up molecules into smaller units is called catabolism. Large molecules, such as nucleic acids, are broken down into smaller molecules, such as amino acids.
Chemical digestion
nuclear explosions or bacteria
They are called enzymes.
Weathering and erosion breaks rocks into smaller pieces.
weathering
Digestive System.
Alcohol has no affect on metabolism; metabolism breaks alcohol down in the body.
The process of photosynthesis breaks up CO2 molecules.
It breaks down the proteins into smaller molecules the body can use
catabolism,where energy is rich complex macromolecules are degrade into small molecules.Energy released during this process is trapped as chemical energy usually as ATP. Ananolism,(biosynthesis) the cell synthesise complex molecules from simpler precursors.this needs energy.