5.4 Proteins perform most function in cells

The functions of Protein

protein is a polymer conrtucted from a set of just 20 kinds of monomers called amino acids.

Proteins are responsible for almost all of the day to day functioning of organisms.

Amino acids

amino acids consists of a central carbon atom bonded to four partners. The side of amino acid serine contains a hydroxyl group that attracts water.

Building a Protein

*a polypeptides are cells that create protein by linking amino acids together into a chain.

Our body can make variety of proteins by arranging different amino acids in different orders.

Protein shape

Protein in a simple form of amino acids can not function properly.

* the protein's shape is influenced by the surrounding environment , which is aqueous.

Denaturation is a process in which an unfavorable change in temperature or other qualities of environment can cause a prtoein to unravel and lose its shape.

Concept check.

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

-I see animal coats and muscles. They help you keep warm and stay healthy.

2.Relate two amino acids, polypeptides and proteins.

-Polypeptides help produce proteins. Proteins are produced by the linking of amino acids.

3.Which parts of an amino acid's sturcture are the same in all amoni acids?Which part is unique?

-They all containn hydroxyl groups. They attracts water