5.4

• Protein- a polymer constructed with a set of 20 kinds of monomers that are called amino acids.

• Amino Acid- a monomer that has a central carbon that is then bonded with 4 partner in a covalent bond. Amino acids make up protein. there are only about 20 kinds of amino acids that make up the proteins.

• Polypeptide- a chain formed by amino acids that make proteins.
  
  

• Denaturation- an unnatural change in nature that causes the protein to change it's normal shape.

• Proteins form objects like hair, fur and muscles.

• The amino acids make up all the protein in the world with 20 types.

• polypeptide chains are mostly 100 amino acids long

• A protein in the form of amino acids linked together cannot function correctly

• A protein consists of more than 1 polypeptide twisted and folded together

• 1) Give at least two examples of proteins you can "see" in the world around you. What are their functions?

• Hair and fur are two types of protein that you can see in the world around you.
  

• 2) Relate amino acids, polypeptides, and proteins
• Amino acids make proteins and it makes a polypeptide chain which is usually more than 100 amino acids long.
  
  
• 3) Explain how heat can destroy a protein.
  
• Heat causes denaturation, a process when the protein breaks apart, making it malfunction. Protein is held together by weak side bonds or side bonds with water. Hot molecules can destroy this force because of the force it has.
  
• 4) Which parts of an amino acid's structure are the same in all amino acids? Which part is unique?
  all amino acids share the same 3 bonds. The center bond with the carbon, one to an hydrogen molecule, another to an amino acid and lastly, one to a carboxyl group. The part that is unique is the side group which determines what the protein would be like.