 HAPPY TUESDAY 
BELLWORK:
1. On your Bellwork Sheet write “Complete Lab
Procedures”.
2. Get together with your lab group and complete
your lab write up.
A. Group Names
B. Question: How can I decrease the dissolving
rate of a lifesaver?
C. Hypothesis
D. Procedures (Must have 5 steps)
DNA & ENZYME NOTECARDS
PERIOD 4 & 5
DUE TUESDAY (10/14/14)
Protein
DNA
Nucleotide
Nucleic Acid
Deoxyribose
Nitrogenous Base
Hydrogen Bond
Adenine
Cytosine
Guanine
Thymine
Double Helix
Antiparallel
Catalyst
Substrate
Enzyme (“-ase” must be in
your definition)
Active Site
Enzyme-Substrate Complex
ESSENTIAL
QUESTION: HOW
DOES A BIOLOGICAL
CATALYST WORK?
DESIGN AN EXPERIMENT: HOW CAN YOU DECREASE THE
DISSOLVING RATE OF A LIFE SAVER?
Due at the end of class:

Lab Report including…
 Name
 Question: How can I
decrease the dissolving
rate of a lifesaver?
 Hypothesis: “If we
_________, then the
dissolving rate of the
lifesaver will decrease.”
 Procedure: (must include
at least 5 steps)
 Data: (table, graph, etc)
Available Materials:

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Ziploc bags
Hammer
Water
Soda
Oil
Hot plate (warm up liquids)
Cups
Stirrers
Ice
NOTE! Your experiment tomorrow cannot take longer
than 15 minutes total.
DISCUSSION QUESTIONS
1.
2.
3.
4.
5.
How long did it take for the original lifesaver to
dissolve?
How long did it take for the new lifesaver to
dissolve?
Why do you think there was a difference in
time?
What is a catalyst? What is an enzyme?
How does this lab relate to enzymes and
catalyst?
ENZYMES…

Enzymes are special proteins that work in the body
to help speed up reactions

Enzymes are biological catalysts.

Catalyst: a substance that helps to speed up a chemical
reaction but is not used up in the reaction

Enzymes can be used over and over again.

amylase - in saliva
pepsin - in stomach
Lactase - breaks down lactose
DNA Polymerase I (DNA replication)
DNA Polymerase III (DNA replication)
RNA Polymerase (mRNA synthesis)
Helicase (DNA replication)
Ligase (DNA replication)
ENZYME FUNCTION
Enzymes work best under certain internal
conditions.
 Enzymes help maintain homeostasis in
living organisms.
 Enzymes reduce the activation energy
needed in a reaction and speed up the rate
at which the reaction is completed.

•Enzymes are VERY specific and perform
very specialized tasks
•Substrates are chemicals that bind to
the enzyme and become altered (bonds
formed and/or broken), producing a
product
•Enzymes have specific shapes that match
or react with specific substrates (like a
lock and key)
Draw this in
your notes
complex