Transcript BELL WORK (Buff Binder): Answer the following question on

BELL WORK
Answer the following question on your bell work sheet.
You do NOT have to write the question, but you MUST
write out your entire answer.
Which of the following statements about enzymes is
false?
a) Enzymes are biological catalysts.
b) Enzymes are specific and only fit with one
substrate.
c) Many types of substrates can fit each enzyme.
d) Enzymes reduce the activation energy required
for chemical reactions.
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:
What are the similarities and
differences between
carbohydrates, lipids, proteins?
Discussion Questions
1. How long did it take for the original lifesaver
to dissolve?
2. How long did it take for the new lifesaver to
dissolve?
3. Why do you think there was a difference in
time?
4. What is a catalyst? What is an enzyme?
5. 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
EnzymeSubstrate
Complex
Biomolecule Review
• Copy information from the “Biomolecule
Sort” page into the correct boxes on your
chart. Each box will be filled.
• Write the SENTENCES in the space above
the biomolecule name.
• You may use your notes.
• You must complete the chart ON YOUR
OWN. (CHAMPS)
• Raise your hand if you have any questions.
HW#6: DNA Structure
Periods 4 and 5
Search for the YouTube video “DNA
Structure”
by Alyssa Dolny.
Complete on Page 26 of your I.A.N. using
Cornell Notes. Due on Thursday.