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WorksheetsEnzymes
Total questions: 16
Worksheet time: 8mins
What are isoenzymes?
Enzymes that are tissue specific but catalyze the same reactions
Enzymes that exist in the same tissue but catalyze different reactions
Enzymes that are tissue specific and catalyze different reactions
Enzymes that exist in the same tissue and catalyze the same reactions
What is the difference between a coenzyme and a cofactor?
Coenzymes are inorganic, cofactors are organic
Coenzymes are organic, cofactors can be organic or inorganic
Coenzymes are complete enzymes, cofactors are inactive
Coenzymes are inactive, cofactors are complete enzymes
What distinguishes non-genetic variants from genetic variants?
Non-genetic variants are encoded by distinct genes
Non-genetic variants involve post-translational modifications
Genetic variants involve post-translational modifications
Non-genetic variants have no modifications
Which of the following is an example of an inorganic cofactor?
NAD
FAD
Zn
NADP
What is a common characteristic of inorganic cofactors?
They are proteins
They are vitamins
They are metal ions
They are carbohydrates
How many digits are typically in an enzyme's code number?
Two
Three
Four
Five
How is each enzyme identified in the enzyme nomenclature system?
By its molecular weight
By a systematic code number
By its structural formula
By its color
What does the term "oxidation" refer to in a chemical reaction?
Loss of electrons
Gain of electrons
Loss of protons
Gain of protons
For Enzyme nomenclature, what does the first digit represent?
Major class the enzyme belongs to
The subclass that looks at what type of chemical reaction the enzyme uses
The subclass or group being actued upon
Differentiates between closely related enzymes
For Enzyme nomenclature, what does the second digit represent?
Major class the enzyme belongs to
Differentiates between closely related enzymes
The subclass or group being actued upon
The subclass that looks at what type of chemical reaction the enzyme uses
This group of enzymes utilizes a water molecule to split a substrate/analyte.
ISOMERASES
HYDROLASES
LIGASES
DEHYDROLASES
This group of enzymes causes the nonhydrolytic removal of a group or addition of a group to a substrate.
Hydrolases
Oxidoreductases
Dehydrolases
Lyases
All of the following facts regarding enzymes are true, EXCEPT?
Enzymes are not altered or consumed during a reaction
Only a small amount of enzymes are required
Reactions call for a large amount depending on the substrate concentration
Enzymes accelerate the speed at which a chemical reaction reaches equillibrium
In first order kinetics the rate/velocity of the reaciton is independent of the susbtrate concentraiton.
True
False
In zero order kinetics the rate/velocity of the reaciton is dependent on the susbtrate concentration.
True
False
These enzymes are predominately found in the bloodstream, either circulating freely or in association to cellular debris.
Secreted enzymes
Cellular enzymes
Tissue enzymes
Plasma enzymes
