Biology Discussion Notes
Thursday 10/30/2014
Goals for the Day
1. Be able to determine the reactants and
products of a chemical equation.
2. Be able to define activation energy
3. Be able to DRAW & describe what an
enzyme is and what it does
Question of the Day 10/30
What are the 3 things that affect
enzyme activity?
ENZYMES
Three things that effect enzyme activity
1.Temperature
2. pH (acidic or basic)
3. Concentration (how many enzymes are working)
Enzymes
Enzyme – A protein that acts as a catalyst
Catalyst – a substance that speeds up a chemical
reaction without being used up or destroyed.
Enzymes are responsible for almost ALL
chemical reactions in living things (Organisms).
Catalase
2H2O2
Catalase
2H2O + O2
Enzymes
How does an enzyme speed up a chemical
reaction?
ENZYMES speed up a chemical reaction by
lowering the activation energy
(
)
Enzymes
ENZYMES speed up a chemical reaction by
lowering the activation energy (the amount of
energy required to start a reaction)
ENERGY
ACTIVATION
ENERGY
Reactants
Products
TIME
ACTIVATION
ENERGY
with
ENZYME
Enzymes
Why do we put the enzyme above
the arrow, and not on the side of
the reactants or products?
Example of a chemical equation
Reactants
Product
AB
ENZYME
A+B
ENZYMES
Enzymes do not ever get used up.
Enzymes do not die, but they can
denature – the _________ is changed
and they become unusable, ruined, and
no longer work
ENZYMES
Question: If an enzyme is denatured, and
its _____________ changes, what
happens when it is cooled down? Can it
work again?
ENZYMES
Enzymes do not ever get used up.
Enzymes do not die, but they can
denature – the _________ is
PERMENANTLY changed and they
become unusable, ruined, and no longer
work
What are the 2 things that
chemical reactions can do?
• Hint they both start with a “B”
Types of Enzymes
Anabolic Enzyme – helps to build a molecule
Example of reaction helped by anabolic enzymes:
Enzymes
Catabolic Enzyme – helps to break something
down
Example of reactions helped by catabolic enzymes:
Enzyme Lab
• Check & complete Lab questions with group
• Work on Enzymes study guide
Species of the day 10/30
• Common Vampire Bat -Desmodus rotundus
Species of the day 10/30
• Common Vampire Bat -Desmodus rotundus
Common Vampire Bat Range
Species of the day 10/30
• Common Vampire Bat -Desmodus rotundus
The enzymes in this bat help it
stay alive by lowering the
____________ __________ of
its metabolic reactions (the
chemical reactions that keep it
alive).