1. meat, fish, eggs, cheese
They help to build bones and muscles and regulate every function in the body. They also help to fight illnesses. Proteins are made up of chains of amino acids
bones, muscles, tendons, membrane proteins, transport proteins

2. Amino acids
20 Amino acids
Essential and Non-Essential

3. tending to repel or fail to mix with water. The opposite of hydrophilic.
having a tendency to mix with, dissolve in, or be wetted by water. The opposite of hydrophobic
It becomes charged which determines its shape and if it is hydrophobic or hydrophilic

4. By the way they react with water.
Hydrophobic are buried deep inside the protein.
Hydrophilic are located on the surface of the protein.
Denaturation
Proteins are specific because of its shape. When they denaturation, the shape changes and the function stops.