A presentation about enzymes.

1. Biochem P3 G6
By: Joanna Fielding, period 3

2. Introduction to Enzymes
Enzymes are efficient catalysts for biochemical
reactions. Enzymes are efficient because they
speed up reactions by providing an alternative
reaction pathway. This is how they partake in
reactions.

3. Enzymes as proteins
An enzyme is a protein molecule. Enzymes are
catalysts. Catalysts are substances that speed
up a chemical reaction. The enzymes in your
mouth break down the food that you eat.The
particles of your food convert to energy for your
body.

4. Summary
Enzymes are essential for chemical reactions
taking place in the body and for the normal
activity of cells, tissues, fluids, and organs. As a
catalyst, an enzyme speeds up the chemical
reaction in your body.

5. The lock-and-key model represents which substrate fits
with the active site of the enzyme. The active site takes
on a unique shape to compliment that of the substrate. If
the substrate doesn’t fit with the active site, a
biochemical reaction will not happen. If it fits, a reaction
occurs with the enzyme.

6. Vocabulary
Enzyme- a substance
produced by a living
organism that acts as a
catalyst to bring about a
specific biochemical
reaction.
Catalyst- a substance that
increases the rate of a chemical
reaction without itself undergoing
any permanent chemical change.
Activation Energy-
Energy needed to get a
reaction started.Substrate- a substance or
layer that underlies
something, or on which some
process occurs, in particular.