BIO I- Metabolism
Metabolic reactions fall under two general categories: anabolic and catabolic. What type of chemical reactions are these two classes of metabolic reactions?
Anabolic reactions are endergonic reactions, whereas catabolic reactions are exergonic.
A drug binds to the active site of an enzyme. If it is bound to the active site of the enzyme, it prevents substrate binding. This drug would be considered a(n)
Competitive Inhibitor
The mathematical expression for the change in free energy of a system is ΔG=ΔH-TΔS Which of the following is correct?
Delta G is the change in free energy
Which of the following statements regarding enzymes is true?
Enzymes increase the rate of a reaction by lowering the activation energy barrier.
Why is ATP an important molecule in metabolism?
It provides energy coupling between exergonic and endergonic reactions.
The Law of Thermodynamics that states that energy cannot be created or destroyed is:
The First Law of Thermodynamics
The Law of Thermodynamics that states that increases in entropy are favored is:
The Second Law of Thermodynamics
A particular chemical reaction is exergonic. What can you say about the relationship between the reactants and the products in this exergonic reaction?
The reactants have more free energy than the products
If the ΔG of a reaction was -31.45 kJoules, you would know that:
The reaction is spontaneous.
Which of the following is true for all exergonic reactions?
The reaction proceeds with a net release of free energy.
Which of the following is true for anabolic pathways?
They consume energy to build up polymers from monomers.
Why do we have storage macromolecules, such as fats, in our bodies?
We can break down these macromolecules to provide energy for the endergonic reactions in our bodies.
Which of the following types of reactions would decrease the entropy within a cell?
anabolic reactions
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
catabolism
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
changing the shape of the enzyme's active site
The synthesis of sugar molecules through the process of photosynthesis requires energy absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?
endergonic
Whenever energy is transformed, there is always an increase in the
entropy of the universe
The active site of an enzyme is the region that
is involved in the catalytic reaction of the enzyme
The chemistry of living systems representing all chemical reactions is called
metabolism
Energy is defined as
the capacity to do work
