Biology: Chapter 8
Which of the following is (are) true for anabolic pathways?
They consume energy to build up polymers from monomers
Which of the following statements is true concerning catabolic pathways?
They supply energy, primarily in the form of ATP, for the cell's work.
Which of the following statements describes enzyme cooperativity?
A substrate molecule bound to an active site of one subunit promotes substrate binding to the active site of other subunits.
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
Catabolism
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 increase the rate of a reaction by lowering the activation energy barrier.
Which of the following is true of enzymes?
Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
Why is ATP an important molecule in metabolism?
It provides energy coupling between exergonic and endergonic reactions
According to the induced fit hypothesis of enzyme catalysis, which of the following is correct?
The binding of the substrate changes the shape of the enzyme's active site.
Which of the following is most similar in structure to ATP?
an RNA nucleotide
Allosteric enzyme regulation is usually associated with
an enzyme with more than one subunit.
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
by changing the shape of the enzyme's active site
The active site of an enzyme is the region that
is involved in the catalytic reaction of the enzyme.