Transcript Aim: Why are Enzymes necessary for our survival?

LO: SWBAT explain why enzymes are
necessary for our survival
DN: What are proteins? Give some
examples of proteins.
HW:Read pages 49-53, page 49-vocab (7)
Tuesday: page 58# 15, 16, 19, 20, 21, 22
Wednesday: Castle Learning (enzymes)
What role do enzymes play in
our bodies?
Enzymes speed up
chemical reactions
A+B
C
Let’s Review Chemical
Reactions:
• A+B
Raw Materials
C
Products
or
• C
A+B
What Reaction is this?
A+B
AB + H2O
Enzyme
Dehydration Synthesis
If an enzyme is added to the reaction, then it
will speed up the reaction.
In other words, we will produce A-B more
quickly.
What is a Catalyst?
A catalyst is any substance that speeds up a chemical
reaction without itself being changed.
Why are enzymes called organic catalysts?
They are PROTEINS!!
What are some important reactions
that enzymes need to speed up?
Digestion
Photosynthesis
Synthesis
Cell Respiration
What are Substrates and Active
Sites?
A+B
AB
AB
Substrates- are the reactants that bind to the enzyme
Active Site- is the place on the enzyme where the
substrates bind
Think of enzymes and
substrates as a lock and key
Substrate
Enzyme
Active Site
Enzyme-Substrate Complex
Enzyme
Substrate
Is formed when the substrate is bound to the enzyme
Enzyme-substrate specificity
Enzymes are SPECIFIC (in shape)
for the SUBSTRATES they attach
to, just like a lock and key.
How do enzymes work?
AB
Enzymes bind to the reactants so the chemical
reaction can take place (that is why AE is lowered).
ENZYME
A+B
AB
What do you think determines the
shape of enzymes?
Enzyme
1)The sequence (order) of amino acids in a
protein determine its shape
2) The shape of a protein determines its activity
WHAT CHANGES?
The enzyme
it can
A-B + H2Odoesn’t change,
A+B
be reused What reaction is this?
Enzyme
Hydrolysis
Some common enzymes
PROTEIN
protease AMINO ACIDS
Hydrolysis
Can you ID the substrate, product,
enzyme, active site, & enzyme substrate
complex?
Active Site
Substrate
Enzyme – Substrate
Complex
Product
Enzyme