Proteins

1
Proteins Enzymes

• pp. 100-105

2
Protein Function

• Protein is a polymer.
• All proteins are made up of various combinations
  of 20 amino acids.

3
Proteins

• Responsible for day-to-day functioning in
  organisms.

4
Amino Acids

• The monomer that makes up proteins
• Amino acids are linked together by a dehydration
  reaction.

5
Amino Acids

• A link of amino acids is called a polypeptide
  chain.

6
Protein Shape

• A polypeptide chain must be packaged into a
  protein before it can function.
• Temp., pH, and salinity can change the shape, or
  denature, proteins.

7
Denaturation

• When a protein is denatured, it loses shape and
  its ability to work properly

8
Enzymes

• A catalyst is a chemical that speeds up
  reactions.
• Enzymes are proteins that are catalysts.

9
Enzymes

• Enzymes speed up reactions in the body.
• They lower activation energy (needed to start a
  reaction)

10
How Enzymes Work

• Enzymes react with substrates to speed up
  reactions.
• The substrate binds to active sites.

11
How Enzymes Work

• Once the substrate binds, the reaction is sped
  up.
• The substrate is converted to products.
• The products are released

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