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- 1. Multiple Choice
Which of the following statements regarding enzyme is TRUE
Enzyme decreases the free energy change of a reaction
Enzyme changes the direction of chemical reaction
Enzyme increase rate of reaction
Enzyme prevents changes in substrate concentration
- 2. Multiple Choice
An enzyme catalyses a reaction by …
lowering the energy of activation of a reaction
supplying the energy to speed up a reaction.
lowering the free energy of a reaction.
changing the equilibrium of a spontaneous reaction.
- 3. Multiple Choice
What is the active site of an enzyme?
A region that binds allosteric regulators of the enzyme
A region that binds the products of the catalytic reaction
A region that is inhibited by the presence of a coenzyme or a cofactor
A region that is involved in the catalytic reaction of the enzyme
- 4. Multiple Choice
Zinc, an essential trace element for most organisms, is present in the active site of enzyme carboxypeptidase. The zinc most likely functions as
a cofactor necessary for enzyme activity
a competitive inhibitor of the enzyme
a non-competitive inhibitor of the enzyme
a coenzyme derived from a vitamin
- 5. Multiple Choice
Watch the animation and identify the hypothesis involved
Lock and Key hypothesis
Induced Fit hypothesis
Enzyme-Substrate hypothesis
- 6. Multiple Choice
NAD+ is the example of
metal ions
coenzyme
prosthetic group
- 7. Multiple ChoiceWhat is structure A?SubstrateActive siteEnzymeProducts
- 8. Multiple ChoiceHow do enzymes speed up chemical reaction?Increasing activation energyDecreasing activation energyIncreasing deactivation energyDecreasing deactivation energy
- 9. Multiple ChoiceIn the diagram, what is letter A?productsubstrateenzyme-substrate complexactive site
- 10. Multiple Choice
what reduces the productivity of enzymes by blocking substrates from entering active sites?
non competitive inhibitors
competitive inhibitors
coenzymes
cofactors
- Answer choicesTagsAnswer choicesTags