You Are Studying a Newly Discovered Growth Factor

question 17

Multiple Choice

You are studying a newly discovered growth factor. You find that this growth factor stimulates the proliferation of chicken cells grown in the laboratory. You have also found that the receptor that binds the growth factor is a receptor kinase. Which of the following mutations would you expect to promote uncontrolled cell proliferation?

• A)a mutation that prevents dimerization of the receptor
• B)a mutation that destroys the kinase activity of the receptor
• C)a mutation that inactivates the phosphatase that dephosphorylates the activated receptor
• D)a mutation that prevents the binding of the normal extracellular signal to the receptor

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Definitions:

Run Winding

The winding in a motor that is energized during normal operation to produce torque.

Fractional Horsepower

A term describing motors that have a power rating less than one horsepower, often used in low-power applications.

Induction Motors

A type of electric motor that operates on the principle of electromagnetic induction, where the rotor is not directly supplied with electrical power but obtains it via magnetic fields from the stator.

Chemical Reaction

A process that leads to the transformation of one set of chemical substances to another.