How Is Expression of OR Proteins Controlled

question 19

Multiple Choice

How is expression of OR proteins controlled?

• A) Expression is controlled by stimuli from the environment.
• B) Expression is activated by feedback mechanisms from the olfactory sensory system.
• C) Each olfactory neuron produces only one OR receptor protein.
• D) All neurons produce the OR proteins, as there is no reason to increase or decrease expression.
• E) Each neuron produces a subset of related OR proteins, under control of a common stimulus.