Ch 6 Energy & Enzyme Quiz
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!
- 1.Endergonic reactions
- A.
Are always coupling reactions.
- B.
Have a negative DG and occur spontaneously.
- C.
Can only occur if there is an input of energy.
- D.
Have products with less free energy than the reactants.
- E.
All of the above are correct.
- 2.
- A.
Used to drive another exergonic reaction.
- B.
Used to drive an endergonic reaction.
- C.
Lost as nonusable heat to the environment.
- D.
Used to decrease the entropy of the universe.
- E.
All of the above are correct.
- 3.Which of the following is characteristic of enzymes?
- A.
They lower the energy of activation of a reaction by binding the substrate.
- B.
They raise the energy of activation of a reaction by binding the substrate.
- C.
They lower the amount of energy present in the substrate.
- D.
They raise the amount of energy present in the substrate.
- 4.An enzyme is generally named by adding _____ to the end of the name of the ______.
- A.
"-ose," cell in which it is found
- B.
"-ase," cell in which it is found
- C.
"-ose," substrate
- D.
"-ase," substrate
- E.
"-ase," coenzyme
- 5.Which statement describes the currently accepted theory of how an enzyme and its substrate fit together?
- A.
As the product is released, the enzyme breaks down.
- B.
The enzyme is like a key that fits into the substrate, which is like a lock.
- C.
The active site is permanently changed by its interaction with the substrate.
- D.
As the substrate binds to the enzyme, the shape of the active site changes to accommodate the reaction.
- 6.A coenzyme is
- A.
An ionic cofactor that interacts with an enzyme to allow it to work.
- B.
A protein cofactor that interacts with an enzyme to allow it to work.
- C.
A nonprotein organic cofactor that interacts with an enzyme to allow it to work.
- D.
An ionic cofactor that interacts with an enzyme to inhibit it.
- E.
A protein cofactor that interacts with an enzyme to inhibit it.
- 7.Which organelles contain functioning ATP synthetase complexes in their membranes?
- A.
Golgi complexes and lysosomes
- B.
Mitochondria and chloroplasts
- C.
Endoplasmic reticulum and vesicles
- D.
Vacuoles and vesicles
- E.
Mitochondria and endoplasmic reticulum
- 8.Since energy is completely used up by a cell, the cell requires more energy to enter it in the form of food.
- A.
True
- B.
False
- 9.All organisms produce heat during their metabolic processes.
- A.
True
- B.
False
- 10.The ultimate source of nearly all the energy that is used to support life is sunlight.
- A.
True
- B.
False
- 11.The energy of activation is the energy that must be supplied so that molecules are able to interact with each other in a chemical reaction.
- A.
True
- B.
False
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