Download Enzymes

 HAPPY MONDAY 
Bellwork:
1. Organize Buff Binder
2. Study for Vocab Quiz
3. Quickwrite: Summarize what you have learned
about carbohydrate, lipids, and proteins in 41 words.
In your summary, you must use the words
Monomer
Polymer
Carbohydrate
Lipid
Protein
4 calories/gram
9 calories/gram
1:2:1
Amino Acid
Fatty Acid
Monosaccharide
Open House Tonight
6pm-7:30pm
Notecard check
Thursday
Quiz!
Essential Question:
What is the function of
an enzyme?
Enzymes Notes
I. What is an enzyme?
A. Some chemical
reactions that make life
possible are too slow to
make them practical for
living tissue.
B. A catalyst is a substance
that speeds up the rate
of chemical reactions.
C. Enzymes are proteins that act as biological
catalysts.
1. Enzymes speed up chemical reactions that take
place in cells.
2. Enzymes are very specific, generally catalyzing
only one chemical reaction.
3. For this reason, part of an enzyme’s name is
usually derived from the reaction it catalyzes.
Enzymes usually end in the suffix “–ase”.
Ex. Alcohol dehydrogenase catalyzes the reaction that
removes water from alcohol.
II. How do enzymes work?
A. Enzymes provide a site where reactants can be brought
together to react.
B. The reactants of enzyme-catalyzed reactions are
known as substrates.
C. The substrates bind to a site on the enzyme called the
active site.
D. The fit between the enzyme and its substrate are so
precise that it is often compared to a lock and key.
E. The enzyme and substrate are bound together and
form the enzyme-substrate complex.
F. Once the reaction is over, the products of the reaction
are released and the enzyme is free to start the process
again. reuseable
Lock-and-key Diagram
Draw, color,
and label
this
diagram
Reactant Reactant
Product
Enzyme animation
Enzyme
Enzyme
Enzyme
Enzyme animation
G. Enzymes play
essential
roles in
regulating
chemical
reactions,
making
materials
that cells
need,
releasing
energy, and
transferring
information.
H. Enzymes work by lowering the
activation energy required to start
a chemical reaction.
I. Like all biological molecules, enzymes work
best under certain internal conditions.
J. This is another reason why maintaining
homeostasis is important for living things.
Draw, color, and label
this diagram
Enzyme animation
Enzyme/Substrate Activity:
Design your own connecting analogy to demonstrate
an enzyme and substrate.
Color them and label the following:
enzyme
substrate
enzyme-substrate complex
Then fill in the following analogy:
Enzymes and substrates fit together like _______ and
_______.
The Enzyme Lingo
• Enzyme: a protein that speeds up chemical reactions
• Catalyst: substance that speeds up the rate of a
chemical reaction
• Substrate: the substances that reacts with the
enzyme
• Active Site: place where the substrate bonds to the
(the “reactant” in the reaction…remember reactants and
enzyme
products?)
• Enzyme-Substrate Complex: substance formed when
the enzyme and substrate bond together
As always, summarize what you have
learned about enzymes in 30 words. In
your summary, you must use the
words:
enzyme
substrate
active site
enzyme-substrate complex