Enzymes are not consumed in a reaction, but they are catalysts that allow the reaction to proceed at a faster rate. This therefore means they produce energy needed for a reaction. Take up the quiz below and test your understanding of chapter Ch. 6 on energy & Enzymes. All the best!
Are always coupling reactions.
Have a negative DG and occur spontaneously.
Can only occur if there is an input of energy.
Have products with less free energy than the reactants.
All of the above are correct.
Used to drive another exergonic reaction.
Used to drive an endergonic reaction.
Lost as nonusable heat to the environment.
Used to decrease the entropy of the universe.
All of the above are correct.
They lower the energy of activation of a reaction by binding the substrate.
They raise the energy of activation of a reaction by binding the substrate.
They lower the amount of energy present in the substrate.
They raise the amount of energy present in the substrate.
"-ose," cell in which it is found
"-ase," cell in which it is found
"-ose," substrate
"-ase," substrate
"-ase," coenzyme
As the product is released, the enzyme breaks down.
The enzyme is like a key that fits into the substrate, which is like a lock.
The active site is permanently changed by its interaction with the substrate.
As the substrate binds to the enzyme, the shape of the active site changes to accommodate the reaction.
An ionic cofactor that interacts with an enzyme to allow it to work.
A protein cofactor that interacts with an enzyme to allow it to work.
A nonprotein organic cofactor that interacts with an enzyme to allow it to work.
An ionic cofactor that interacts with an enzyme to inhibit it.
A protein cofactor that interacts with an enzyme to inhibit it.
Golgi complexes and lysosomes
Mitochondria and chloroplasts
Endoplasmic reticulum and vesicles
Vacuoles and vesicles
Mitochondria and endoplasmic reticulum
True
False
True
False
True
False
True
False
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