WorksheetsIb Bio Biotech
Total questions: 25
Worksheet time: 9mins
An enzyme is a
carbohydrate.
protein.
lipid.
nucleic acid.
The region on the surface of the enzyme that the substrate binds to is the
active site.
activation energy.
lock-and-key model.
catalysis.
What suffix is commonly applied to enzymes?
-ase
-ose
-ter
-ice
Enzymes act as catalysts to __________ the rate of a biochemical reaction by ___________ the activation energy needed for the reaction to occur.
increase, lowering
decrease, lowering
increase, raising
decrease, raising
T/F: The lock-and-key model indicates that one enzyme binds to one specific substrate both structurally and chemically.
true
false
According to the induced fit model, as a substrate approaches an enzyme, it induces a ______________ in the active site.
conformational change
chemical change
color change
The coming together of a substrate and the enzyme's active site is known as
collision.
activation energy.
denaturation.
increasing pH.
Collisions are the result of _______ of the substrate and enzyme. Successful collisions are ones in which the substrate and active site correctly ______.
random movements, align
repulsion, repel
cooling, attract
denaturation, match up
After an enzyme is denatured, the substrate can ______ to the active site.
bind
no longer bind
Low temperatures result in _______ thermal energy for the activation of an enzyme-catalyzed reaction.
insufficient
overabundant
As temperature increases toward the optimal level, the kinetic energy of the enzyme and substrate ________, resulting in ________ collisions.
increases, more frequent
increases, less frequent
decreases, more frequent
decreases, less frequent
At temperatures above the optimum temperature, enzyme stability will _______ as the thermal energy disrupts _______ bonds.
decrease, hydrogen
decrease, ionic
increase, hydrogen
increase, ionic
The loss of enzyme shape is called
denaturation.
stress.
random movement.
alignment.
T/F: All enzymes have the same optimum pH range.
true
false
The graph for substrate concentration vs enzyme activity plateaus because
all active sites are full and the enzymes are working at their maximum efficiency.
the enzymes are used up and there aren't any left.
Enzymes used in industry are commonly
immobilized.
replaced after every catalysis reaction.
unstable.
unconcentrated.
_______ is the enzyme that hydrolyzes _______ into glucose and galactose.
Lactase, lactose
Lactose, lactase
Which of these are common uses for enzymes in industry:
Detergents
Making paper
Making carbonated drinks
Producing biofuel
Textiles
What is enzyme immobilisation?
Enzymes being used in industry
Enzymes denaturing in an acidic pH
Enzymes attached to a surface
Enzymes denaturing due to temperature.
Lactase breaks down lactose into:
galactose + glucose
glucose + glycogen
galactose + glycogen
galactose + glycerol
Choose the correct answer.
A
B
C
D
Choose the correct answer.
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B
C
D
Choose the correct answer.
A
B
C
D
Choose the correct answer.
A
B
C
D
Choose the correct answer.
A
B
C
D
