Which Statement About Allosteric Regulators Is True

Multiple Choice

Which statement about allosteric regulators is true?

A) The plot of reaction rate versus substrate concentration for allosteric regulators often displays a sigmoid curve.
B) All enzymes can be allosterically regulated.
C) Allosteric regulators affect substrate binding but do not affect enzyme structure.
D) Binding of allosteric regulators is nonspecific.
E) Allosteric regulators bind to the active site, blocking enzyme function.