
Enzyme
Presentation
•
Biology
•
7th Grade
•
Medium
+1
Standards-aligned
Leonita Swandjaja
Used 9+ times
FREE Resource
37 Slides • 18 Questions
1
Enzyme
Chapter 5
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3
4
Multiple Choice
How many biological molecules have you studied in the previous chapter?
3
4
5
6
5
Multiple Select
What are the biological molecules you have studied in the previous chapter?
lipid
protein
iodine
carbohydrate
DNA
6
Multiple Choice
The biological molecule with nitrogen content is ... .
carbohydrate
lipid
protein
sugar
7
Multiple Choice
The biological molecule with nitrogen content is ... .
carbohydrate
lipid
protein
sugar
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9
10
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16
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20
Multiple Choice
Catalyst is ... .
a protein which speeds up a reaction.
produced only by living organisms
killed in high temperature
not involved in a reaction
21
Multiple Choice
Enzyme ...
works only inside a living cell
produced continuously in our body
killed by extreme pH
is often called biocatalyst
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23
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25
Multiple Choice
The enzyme that works on protein is called ... .
proteinase
protease
protase
prase
26
Multiple Choice
The enzyme that works on sucrose is called ... .
sucroase
sucrose
sucrase
sucronase
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28
Lock and Key Mechanism
In the lock and key hypothesis, the shape of the active site matches the shape of its substrate molecules.
This makes enzymes highly specific.
Each type of enzyme can usually catalyse only one type of reaction (some may catalyse a few types of reactions).
29
Lock and Key Mechanism
The diagram shows how this works. In this example, the enzyme splits one molecule into two smaller ones.
30
Multiple Choice
Which molecule would most likely react with the enzyme?
A
B
C
D
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Multiple Choice
What is being represented by the letter A in the image?
Substrate
Enzyme
Product
Complex
32
Multiple Choice
Letter E...
active site
enzyme
substrate
products
33
Multiple Choice
Letter C...
active site
enzymes
substrate
products
34
Multiple Choice
What is being represented by the letter B in the image?
Substrate
Enzyme
Substrate
Product
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Multiple Choice
The graph shows the relative rates of action of four enzymes, A, B, C, and D. Which enzyme shows the greatest change in its rate of action with the least change in pH?
enzyme A
enzyme B
enzyme C
enzyme D
49
Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
50
Multiple Choice
Based on the graph, what is the optimal temperature for this enzyme?
15oC
40oC
30oC
35oC
51
Multiple Choice
52
Multiple Choice
If an enzyme becomes over heated what effect, if any, will the heat have on the enzymatic activity?
The enzyme will not store much chemical energy.
The enzyme will not be able to catalyze reactions.
The enzyme will lose its net electrical charge.
The enzyme will lose stored genetic information.
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Enzyme
Chapter 5
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