How does a noncompetitive inhibitor limit an enzyme's activity?
A. A noncompetitive inhibitor binds to the active site of an enzyme.
B. A noncompetitive inhibitor binds to the substrate, preventing it from binding to the enzyme.
C. A noncompetitive inhibitor binds to a coenzyme or cofactor, preventing it from binding to the enzyme.
D. A noncompetitive inhibitor binds to an allosteric site of the enzyme.
D. A noncompetitive inhibitor binds to an allosteric site of the enzyme.
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Sperm pass through all of the following structures en route to the egg, except:
A. the ovaries. B. the uterus. C. the cervix. D. the vagina. E. the fallopian tubes.
Taq polymerase is commonly used in PCR reactions because it ____
a. keeps the primers from annealing to the DNA b. makes fewer DNA replication errors than other DNA polymerases c. is a heat-stable DNA polymerase d. is more efficient at replicating DNA than other DNA polymerases e. helps the primers anneal to the correct DNA sequence
Fossil fuels are considered part of the "rock" pool of carbon on Earth. Burning fossil fuels moves that carbon into the atmosphere. Increased carbon in the atmosphere can lead to increased carbon:
What will be an ideal response?
Chaperone proteins
A) ensure that a protein is folded correctly. B) cleave a phosphate from ATP to release energy. C) escort proteins to the location in a cell where they are needed. D) ensure that amino acids are placed in the correct order when forming a protein. E) ensure that DNA molecules form double-stranded helices.