Biology (Raven), 9th Edition

Chapter 9: Cell Communication

Pre-Test

1
Which of the following is NOT a second messenger for signal transduction?
A)Calcium ions
B)Nitric oxide gas
C)ATP
D)Cyclic AMP
E)Diacylglycerol (DAG)
2
The major difference between a cell that responds to a signal and one that does not is the presence of
A)a DNA sequence that responds to the signal.
B)a nearby circulatory vessel.
C)a receptor.
D)a second messenger.
E)a transduction pathway.
3
Which of the following is NOT a consequence of binding of a signal to a receptor?
A)Change in conformation of the receptor
B)Activation of receptor enzyme activity
C)Diffusion of the receptor in the plasma membrane
D)Breakdown of the receptor to amino acids
E)Release of the signal from the receptor
4
Which of the following is NOT a common type of receptor?
A)Channel-linked
B)Enzymatic
C)G protein-coupled
D)Membrane receptors
E)Steroid
5
A nonpolar molecule such as a steroid hormone usually binds to
A)a cytoplasmic receptor.
B)a protein kinase.
C)an ion channel.
D)a phospholipid.
E)a second messenger.
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