In Reactions Catalyzed by Allosteric Enzymes

question 39

Multiple Choice

In reactions catalyzed by allosteric enzymes

• A) substrate, activators, and inhibitors all compete for the same binding site on the enzyme.
• B) there is no distinction between catalytic and regulatory subunits.
• C) the presence of an activator makes the plot of reaction rate against substrate concentration less cooperative.
• D) the presence of an inhibitor makes the plot of reaction rate against substrate concentration less cooperative.

---

Definitions:

Axon Terminal

The very end of a branch of a neuron's axon, a structure that releases neurotransmitters to signal other neurons.

Exocytosis

A process by which a cell transports secretory products through the cell membrane to the outside of the cell in vesicles.

Transporters

Proteins that move molecules across cell membranes, either into or out of the cell.

Cell Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, which regulates the passage of substances in and out of the cell.