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WorksheetsChapter 4: Biocatalysis
Total questions: 20
Worksheet time: 15mins
Enzymes are composed of what organic molecule?
Sugars
DNA
Proteins
Fatty Acids
What happens to an enzyme when it is denatured?
Activation energy is lowered.
It becomes stronger.
It loses its shape.
Activation energy is raised.
Based on the graph, what temperature does this enzyme work best?
15 C
40 C
30 C
20C
In the diagram, what is letter A?
product
substrate
enzyme-substrate complex
active site
.
Which line represents an enzyme-catalyzed reaction?
Line 1
Line 2
In a chemical reaction, a reactant binds to an enzyme at a region known as the
catalyst.
product.
substrate.
active site.
Significantly changing the pH, the enzyme is exposed to will cause the enzyme to _____________.
increase enzymatic action
fit better with the substrate
denature
evaporate
the amount of energy needed to start the reaction
cofactor
activation energy
catalyst
specificity
The suffix found in names of enzymes; all enzymes end in this suffix
-ise
-ase
-ose
-ame
Which of the following conclusions can be drawn from this graph?
The optimum pH of the enzyme is 6.6.
The optimum pH of the enzyme is 5.8
The enzyme’s activity increases as pH increases 5.0 to 9.0
The enzyme’s activity is greater around pH of 8.0 .
Which of these is most likely an enzyme?
Sucrose
Galactose
Fructose
Amylase
Which cofactors are not permanently bound to enzymes?
Metal Ion cofactors
prosthetic groups
Some cofactors change the charge distribution on the surface of substrate or enzyme molecules. Suggest what importance this has?
Makes the temporary bonds of ES complexes easier to form
Makes the permanent bonds of ES complexes easier to form
Makes it easier to form EP complexes
Makes it easier for products to bind to the active site
State the function of X?
Binding site of substrate
Binding site of cofactor
Binding site of reactant
Binding site of inhibitor
Enzyme that join the ends of two strands of nucleic acid is
Ligases
Hydrolases
Transferases
Isomerases
Which of these statements are true about competitive inhibitor?
Inhibitor and substrate has similar structure
The inhibitor binds to the allosteric site
The conformation of active site changed due to the inhibitor
Quantity of product formed is the same as reaction with inhibitor
.
Which of these are competitive inhibitor?
answer choices
Hydrogen cyanide
Malonic acid
Mercury
Isoleucine
Give one similarities between competitive inhibitor and non-competitive inhibitor action
Both caused enzyme's conformation changed
The maximum rate of reaction is not reached
Reaction becomes slower
The rate of reaction can be increased by increasing the substrate concentration
what impedes enzymatic reactions by binding to another part of the enzyme?
noncompetitive inhibitor
competitive inhibitors
coenzymes
cofactors
Competitive inhibition can be overcome by _______________
increase the concentration of substrate
reduce the concentration of enzyme
increase the concentration of enzyme
reduce the concentration of substrate
