Which describes the action of a ligand's competitive antagonist?
A. It decreases the amount of ligand required to activate the protein.
B. It blocks the binding of the ligand to its binding site and prevents activation of the protein.
C. It binds to a different binding site on the protein, altering the protein shape so that a ligand cannot bind.
D. When present, it increases the binding of a ligand to its receptor.
B
You might also like to view...
Hormones influence cellular operations by changing which of the following features of cytoplasmic enzymes?
A) quantities B) types C) activities D) All of the answers are correct. E) None of the answers are correct.
Label B represents which of the following structures?
A) uterine tube
B) fornix
C) pubic symphysis
D) ovary
E) uterus
The "rest-and-digest" system of the autonomic nervous system is the ________
A) parasympathetic B) sympathetic C) somatic nervous system D) peripheral nervous system
Segmental contractions are mixing contractions that occur predominantly in the _________________
A. oral cavity B. large intestine C. esophagus D. stomach E. small intestine