Biology Chapter 6
The mechanism by which the end product of a metabolic pathway inhibits an enzyme that catalyzes an earlier step in the pathway is most precisely described as
feedback inhibition
The cellular process of synthesizing large molecules from smaller ones is defined as
Anabolism
Cooperativity is a form of allosteric activation in which
Binding of a substrate molecule to one active site in a multisubunit enzyme stimulates the binding of substances molecules to the active sites of other subunits
The active site of an enzyme is the region that
Binds substrates for the enzyme
The cellular process of breaking down large molecules into smaller ones is defined as
Catabolism
A noncompetitive inhibitor decreases the rate of an enzymatic reaction by
Changing the shape of the enzyme active site
A chemical reaction that has a positive G is best described as
Endergonic
Which of the following is a statement of the first law of thermodynamics?
Energy cannot be created or destroyed
Which of the following statements regarding enzymes is true?
Enzymes increases the rate of a reaction by lowering the activation energy barrier
Which of the following statements is a logical consequence of the second law of thermodynamics?
Every chemical reaction must increase the total entropy of the universe
Why might a severe fever result in death if it is not brought under control?
It may alter the tertiary and quaternary structures of cellular enzymes
Which of the following is the most comprehensive definition of metabolism in living organisms?
Metabolism consists of all the energy transformation reactions in an organism
Which of the following statements is true for all exergonic reactions?
The reaction proceeds with a net release of free energy
