enzyme activity how to interpret enzyme graphs (next slide)
TRANSCRIPT
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ENZYME ACTIVITY
How to interpret enzyme graphs
(NEXTSLIDE)
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Reading Graphs
Which graph shows the amount of substrate going to zero faster?
Time (sec)
Sub
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Time (sec)
Sub
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So…
Nope, the amount of substrate gets to zero in less time in the OTHER graph.
Time (sec)
Sub
stra
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Time (sec)
Sub
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So…
YES!! The amount of substrate gets to zero in less time in this graph.
Time (sec)
Sub
stra
te
Time (sec)
Sub
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So…
Which enzyme works FASTER?
Time (sec)
Sub
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Time (sec)
Sub
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So… Nope, not this one. The faster the enzyme
works, the faster the substrate will decrease.
Time (sec)
Sub
stra
te
Time (sec)
Sub
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So…
YES!! This enzyme works faster because the substrate decreases faster!!
Time (sec)
Sub
stra
te
Time (sec)
Sub
stra
te
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What do you think can affect the speed of an enzyme?
TEMPERATURE
AMOUNT OF LIGHT
pH
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What do you think can affect the speed of an enzyme?
RIGHT!! Changing the pH of the reaction can affect the speed of an enzyme.
ANYTHING ELSE?
TEMPERATURE
AMOUNT OF LIGHT
pH
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What do you think can affect the speed of an enzyme?
RIGHT!! Changing the temperature of the reaction can ALSO affect the speed of an enzyme.
TEMPERATURE
AMOUNT OF LIGHT
pH
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What do you think can affect the speed of an enzyme?
RIGHT!! Changing the temperature of the reaction can affect the speed of an enzyme.
ANYTHING ELSE?
TEMPERATURE
AMOUNT OF LIGHT
pH
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What do you think can affect the speed of an enzyme?
RIGHT!! Changing the pH of the reaction can ALSO affect the speed of an enzyme.
TEMPERATURE
AMOUNT OF LIGHT
pH
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What do you think can affect the speed of an enzyme?
Sorry, most enzymes are NOT affected by the amount of light…
Pick again
TEMPERATURE
AMOUNT OF LIGHT
pH
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Factors affecting enzyme speed
We can make a graph of enzyme speed at different temperatures.
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Graph of ENZYME SPEED
Speed of enzyme Temperature (°C)
What should go on the X axis?
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Graph of ENZYME SPEED
Speed of enzyme Temperature (°C)
Nope, the speed of the enzyme is what we are MEASURING,it should go on the Y axis.
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Graph of ENZYME SPEED
RIGHT! Temperature should go on the X axis.
Temperature (°C)0 20 50 6010 4030
What should go on the Y axis?(HINT: This is what we areMEASURING)
Amount of substrate
Speed of enzyme
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Graph of ENZYME SPEED
Temperature (°C)0 20 50 6010 4030
What should go on the Y axis?(HINT: This is what we areMEASURING)• We’re not measuring the
amount of substrate this time.
Amount of substrate
Speed of enzyme
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Graph of ENZYME SPEED
Temperature (°C)0 20 50 6010 4030
RIGHT!!The speed of enzyme should go on the Y axis.
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REMEMBER!! The enzyme is working FASTERAs you go UP the Y axis.
SLOW
FAST
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
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Amylase is found in saliva. Click on the red button that is approximately at body temperature
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
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Amylase is found in saliva. 5°C is close to freezing.
TOO COLD!!
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
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Amylase is found in saliva. 22°C is close to room temperature.
TOO COLD!!
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
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Amylase is found in saliva. 55°C is 131°F.
TOO HOT!!
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
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Amylase is found in saliva. 37°C is body temperature. RIGHT!! Amylase will work best
at about 37°C because it is normally found in your mouth
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
FAST
Amylase works slowlyAt very low temperatures
Because it is not closeTo body temperature
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
FAST
Amylase will work Faster as it getsCloser to bodyTemperature.
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
Sp
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SLOW
FAST Amylase will work fastest
at bodyTemperature.
The temperature where Amylase works BEST is called the OPTIMUM TEMPERATURE
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
Sp
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SLOW
FAST As the temperature gets too hot,Amylase doesn’t work as well.
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
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SLOW
FAST Click on the OPTIMUM TEMPERATURE
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Let’s GRAPH!!
Temperature (°C)0 20 50 6010 4030
Sp
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SLOW
FAST Click on the OPTIMUM TEMPERATURE
RIGHT!!
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What is the optimum temperature for this enzyme?
Temperature (°C)0 20 50 6010 4030
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SLOW
FAST
10°C
20°C
30°C
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What is the optimum temperature for this enzyme?
Temperature (C)0 20 50 6010 4030
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SLOW
FAST
10°C
20°C
30°C
REMEMBER: The OPTIMUM is the temperature the enzyme
works fastest at.
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What is the optimum temperature for this enzyme?
Temperature (°C)0 20 50 6010 4030
Sp
eed
of
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me
SLOW
FAST
10°C
20°C
30°C
REMEMBER: The OPTIMUM is the temperature the enzyme
works fastest at.
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Right!!
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What is the optimum pH for this enzyme?
pH0 4 10 122 86
Sp
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SLOW
FAST
9
10
11
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What is the optimum pH for this enzyme?
pH0 4 10 122 86
Sp
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SLOW
FAST
9
10
11
Look closely…
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What is the optimum pH for this enzyme?
pH0 4 10 122 86
Sp
eed
of
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me
SLOW
FAST
9
10
11
Look closely…
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Right!!
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What is the optimum temperature for this enzyme?
Temperature (°C)20 40 70 8030 6050
Sp
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SLOW
FAST
20°C
63°C
48°C
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What is the optimum temperature for this enzyme?
Temperature (°C)20 40 70 8030 6050
Sp
eed
of
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me
SLOW
FAST
20°C
63°C
48°C
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What is the optimum temperature for this enzyme?
Temperature (°C)20 40 70 8030 6050
Sp
eed
of
enzy
me
SLOW
FAST
20°C
63°C
48°C
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Right!!
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What temperature does the enzyme work best at?
Time
Sub
stra
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Temperature =
25°C
Time
Sub
stra
te
Temperature =
35°C
Time
Sub
stra
te
Temperature =
30°C
At 25°C At 30°C At 35°C
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REMEMBER: the faster the substrate decreases, the faster the
enzyme is working
Time
Sub
stra
te
Temperature =
25°C
Time
Sub
stra
te
Temperature =
35°C
Time
Sub
stra
te
Temperature =
30°C
At 25°C At 30°C At 35°C
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REMEMBER: the faster the substrate decreases, the faster the
enzyme is working
Time
Sub
stra
te
Temperature =
25°C
Time
Sub
stra
te
Temperature =
35°C
Time
Sub
stra
te
Temperature =
30°C
At 25°C At 30°C At 35°C
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TO SHOW HOW WELL YOU UNDERSTOOD, COMPLETE
THIS SHORT QUIZ
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QUIZ - QUESTION 1
Where in your body is the amylase enzyme found?
SALIVA STOMACHLIVER
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QUIZ - QUESTION 1
Where in your body is the amylase enzyme found?
SALIVA STOMACHLIVER
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QUIZ - QUESTION 1
Where in your body is the amylase enzyme found?
SALIVA STOMACHLIVER
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Right!!
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QUIZ - QUESTION 2
Click on the CATALYST in this reaction:
STARCH SUGAR
AMYLASE
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QUIZ - QUESTION 2
REMEMBER: The catalyst performs the reaction, but isn’t used up
STARCH SUGAR
AMYLASE
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QUIZ - QUESTION 2
REMEMBER: The catalyst performs the reaction, but isn’t used up
STARCH SUGAR
AMYLASE
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Right!!
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QUIZ - QUESTION 3 Click on the substrate that is most likely to
react with the enzyme below:
PROTEIN LIPIDSTARCH
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QUIZ - QUESTION 3 REMEMBER: The subtrate that fits into a
protein will be the one that reacts with it.
PROTEIN LIPIDSTARCH
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QUIZ - QUESTION 3 REMEMBER: The subtrate that fits into a
protein will be the one that reacts with it.
PROTEIN LIPIDSTARCH
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Right!!
PROTEIN
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QUIZ - QUESTION 4
What is the most likely name of the enzyme in question 3 that reacts with protein?
PROTEINOSE
PROTEINASEPROTEINZYME
PROTEINATION
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QUIZ - QUESTION 4
NOPE: sugars end in -OSE, not enzymes (sucrose, lactose, glucose)
PROTEINOSE
PROTEINASEPROTEINZYME
PROTEINATION
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QUIZ - QUESTION 4
NOPE: think about “lactase” and “amylase”
PROTEINOSE
PROTEINASEPROTEINZYME
PROTEINATION
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QUIZ - QUESTION 4
NOPE: think about “lactase” and “amylase”
PROTEINOSE
PROTEINASEPROTEINZYME
PROTEINATION
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Right!!
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QUIZ - QUESTION 5 Click on the part of the graph that shows
the OPTIMAL temperature for this enzyme
Temperature (°C)
Enz
yme
Act
ivity
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QUIZ - QUESTION 5 REMEMBER: the OPTIMAL temperature
for an enzyme is the temperature where the enzyme works BEST (highest activity)
Temperature (°C)
Enz
yme
Act
ivity
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Right!!
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QUIZ - QUESTION 6 Click on the graph that shows the optimum
pH for this enzyme.
Time
Sub
stra
te
Time
Sub
stra
te
Time
Sub
stra
te
pH = 5.0 pH = 3.0pH = 7.0
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QUIZ - QUESTION 6
REMEMBER: Substrate decreases in LESS time if the enzyme works faster
Time
Sub
stra
te
Time
Sub
stra
te
Time
Sub
stra
te
pH = 5.0 pH = 3.0pH = 7.0
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QUIZ - QUESTION 6
REMEMBER: Substrate decreases in LESS time if the enzyme works faster
Time
Sub
stra
te
Time
Sub
stra
te
Time
Sub
stra
te
pH = 5.0 pH = 3.0pH = 7.0
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Right!!
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Right!!
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You have successfully completed the enzyme powerpoint.