09-05- 11
 1) Chemical Elements found in lipids are
Oxygen
carbon, hydrogen and_____________.
 2) Monosaccharide (sugar) is a monomer
Carbohydrates
of___________________.
Agenda
1)
Warm-Up (5 min)
2)
Biology Homework due!
3)
Pop Warm-up check 5 min
4)
Chemistry of Life Article 20 min
5)
Chemical Rxn & Enzyme Notes 20 min
6)
Enzyme Worksheet
Scientific Method: Experiments #1-4 DUE!!
Show me the warm-up from August 30, 2011
Biomolecule: molecules that are important for our
bodies to function.
Monomer: small molecule
Polymer: large molecule
Biochemistry: chemical reactions that occur inside
of our bodies
1.
2.
3.
4.
5.
6.
Observation
Hypothesis
Experimentation
Conclusion
Theory
Inference
7. Metric System
8. Controlled
Experiment
9. Biomolecule
10.Monomer
11.Polymer
12.Biochemistry
As we have seen living things are made of
chemical compounds, but more importantly
chemistry isn’t just what life is made of, chemistry
is also what life does.
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Chemical reaction – is a process that changes
one set of chemicals into another set of
chemicals.
The elements or compounds that enter into a
chemical reaction are the reactants.
The elements or compounds produced by a
chemical reaction are known as products.


Ex) photosynthesis
Chemical reactions always involve the breaking
of bonds in reactants and the formation of new
bonds in products.
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Energy is neither created nor destroyed,
therefore energy is released or absorbed
whenever chemical bonds form or are broken.
Chemical reactions that release energy often
occur spontaneously. Chemical reactions that
absorb energy will not without a source of
energy.
Ex) 2H2 + O2 yields 2H20
The reverse reaction takes an electrical current
through water to decompose water into hydrogen
and oxygen gas.
 What
significance do these energy
changes have to do with living things?
In order to stay alive, organisms need to
carry out reactions that require
energy.
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Do all reactions occur spontaneously?
If this were true what would happen to your
textbooks?
Will wood burn only if you light it with a match.
Chemists call the energy that is needed to get a
reaction started the activation energy
Fig 2 – 19 shows, activation energy is a factor in
whether the overall chemical reaction releases
energy or absorbs energy.
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Some chemical reactions that make life possible
are too slow or have activation energies that are
too high to make them practical for life.
These reactions require catalysts or substances
that speed up the rate of a chemical reaction.
Catalysts work by lowering a reaction’s activation
energy.
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Enzymes – are proteins that act as biological
catalysts.
Enzymes speed up chemical reactions that take
place in cells.
Enzymes are very specific, generally catalyzing
only one chemical reaction.
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For a chemical reaction to occur, the reactants
must collide with enough energy so that existing
bonds will be broken and new bonds will be
formed.
Enzymes provide a place where reactants can be
brought together to react.
The reactants of enzyme – catalyzed reactions
are known as substrates.
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Fig 2 – 21 provides an example of an enzyme –
catalyzed reaction.
During the reaction, a phosphate group is
transferred from ATP to the glucose molecule.
Each protein (enzyme) has a specific shape, the
substrate binds to the active site on the protein
to help speed up the reaction.
AKA “lock and key”

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Because they are catalysts for reactions, enzymes
can be affected by any variable that influences a
chemical reaction.
Many enzymes are affected by temp, pH, etc.
•Label each fold Protein, Carbohydrate,
Lipid, Nucleic acid
•6 info. Strips (functions, chemical
makeup, monomers, examples, special
properties, and pics)
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Use your biomolecule “notes” to match
each info. box to its correct biomolecule.
Cut out each box and paste in correct
flap.
Do this with each info. strip
◦ functions, chemical makeup, monomers,
examples, special properties, and pics
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When your done, color and decorate
Turn in & start on homework
Best foldables will be displayed
DUE TODAY:
• Chemistry of Life Article
• Enzyme Notes (KEEP)
• Enzyme WS
“The most powerful weapon on earth is the
human soul on fire.”
Ferdinand Foch
DUE NEXT CLASS:
• BRING BIO. BOOK