Key Area 6: Metabolic Pathways
(A)
Metabolism
KA 6:
Metabolic
Pathways
(E) Control
of
metabolic
pathways
through
inhibitors
(B)
Control of
metabolic
pathways through
enzymes
(C) Induced
fit and
Active sites
(D)
Effect of substrate
and end-product
concentrations
Metabolic Pathways (a)
• Revise your knowledge on the properties of
enzymes
• State what is meant by metabolism and metabolic
pathway
• State what is meant by an anabolic pathway (and
make reference to energy)
• State what is meant by a biosynthetic reaction
• State what is meant by an catabolic pathway (and
make reference to energy)
• Give an example of an anabolic and catabolic
reaction
Key Words
•
•
•
•
•
•
•
•
•
Anabolism
Catabolism
Biosynthetic
Enzyme
Metabolism
Substrate
Active site
Activation energy
Specificity
•
•
•
•
•
Induced Fit
Degradation
Synthesis
Amylase
Catalase
TASK:
Think / Pair / Share
What do all these words
mean?
What Can You Remember
about…
ENZYMES
Multi Choice Quiz!
Q1. Enzymes…
a) speed up reactions and
remain unchanged
b) slow down reactions and
remain unchanged
c) speed up reactions and
are used up in the reaction
d) slow down reactions and
are used up in the reaction
Q2. Enzymes are made of…
a) protein
b) carbohydrate
c) fats
d) minerals
Q3. What is an active site?
a) The place on a substrate
where the enzyme binds.
b) The place on the
substrate where the
product binds.
c) The place on the product
where the substrate binds.
d) The place on an enzyme
where the substrate binds.
Q4. Which term best describes a
denatured enzyme?
a) Its active site has
changed shape.
b) Dead.
c) Working at its
fastest rate.
d) Attached to the
substrate.
Q5. What will bind to an active site?
a) All types of
substrate molecule.
b) All types of product
molecule.
c) One type of
substrate molecule.
d) One type of product
molecule.
Q6. Enzymes will work at …
a) only one pH
b) all pHs
c) a range of pHs
d) acidic pHs
Q7. Which graph shows the effect of
temperature on enzyme activity?
a)
a)
activity
activity
b)
temperature
temperature
d)
activity
activity
c)
temperature
temperature
Q8. Which of the following is correct?
a) The substrate of
phosphorylase is hydrogen
peroxide.
b) The substrate of
phosphorylase is glucose-1phosphate.
c) The substrate of
phosphorylase is protein.
d) The substrate of
phosphorylase is starch.
Q9. Which of the following is correct?
a) Starch
catalase
maltose
b) Starch
amylase
maltose
c) Starch
amylase
glucose
d) Starch
catalase
glucose
Q10. Which of the following is correct?
a) Amylase is a synthesis enzyme.
Catalase is a breakdown enzyme.
b) Phosphorylase is a synthesis enzyme.
Catalase is a breakdown enzyme.
c) Catalase is a synthesis enzyme.
Amylase is a breakdown enzyme.
d) Amylase is a synthesis enzyme.
Phosphorylase is a breakdown enzyme.
Q1. Enzymes…
a) Speed up reactions and
remain unchanged
b) slow down reactions and
remain unchanged
c) speed up reactions and
are used up in the reaction
d) slow down reactions and
are used up in the reaction
Q2. Enzymes are made of…
a) Protein
b) carbohydrate
c) fats
d) minerals
Q3. What is an active site?
a) The place on a substrate
where the enzyme binds.
b) The place on the
substrate where the
product binds.
c) The place on the product
where the substrate binds.
d) The place on an enzyme
where the substrate binds
Q4. Which term best describes a
denatured enzyme?
a) The active site has
changed shape
b) Dead.
c) Working at its
fastest rate.
d) Attached to the
substrate.
Q5. What will bind to an active site?
a) All types of
substrate molecule.
b) All types of product
molecule.
c) One type of
substrate molecule
d) One type of product
molecule.
Q6. Enzymes will work at …
a) only one pH
b) all pHs
c) A range of pHs
d) acidic pHs
Q7. Which graph shows the effect of
temperature on enzyme activity?
b)
activity
activity
a)
temperature
temperature
d)
activity
activity
c)
temperature
temperature
Q8. Which of the following is correct?
a) The substrate of
phosphorylase is hydrogen
peroxide.
b) The substrate of
phosphorylase is glucose-1phosphate
c) The substrate of
phosphorylase is protein.
d) The substrate of
phosphorylase is starch.
Q9. Which of the following is correct?
a) Starch
catalase
maltose
b) Starch
amylase
Maltose
c) Starch
amylase
glucose
d) Starch
catalase
glucose
Q10. Which of the following is correct?
a) Amylase is a synthesis enzyme.
Catalase is a breakdown enzyme.
b) Phosphorylase is a synthesis enzyme.
Catalase is a breakdown enzyme.
c) Catalase is a synthesis enzyme.
Amylase is a breakdown enzyme.
d) Amylase is a synthesis enzyme.
Phosphorylase is a breakdown enzyme.