When a Signal Is Initiated by the Binding of an Extracellular

question 40

Multiple Choice

When a signal is initiated by the binding of an extracellular ligand, what is the immediate outcome of that signal?

• A)A protein in the middle of an intracellular signaling pathway is activated.
• B)A protein at the top of an intracellular signaling pathway is activated.
• C)A protein at the top of an extracellular signaling pathway is activated.
• D)A protein at the top of an intracellular signaling pathway is deactivated.
• E)A protein at the bottom of an intracellular signaling pathway is activated.