Which of these is a receptor molecule? a D |
d |
A signal transduction pathway is initiated when a _____ binds to a receptor. a signal molecule |
a |
Which of these is a signal molecule? a A |
a |
A signal molecule is also known as a(n) _____. a receptor |
c |
Which of these is the second of the three stages of cell signaling? a gene activation |
d |
Which of these receptors is NOT a membrane receptor? a E |
a |
Which of these is a G-protein-linked receptor? a B |
e |
Which of these is a receptor tyrosine kinase? a D |
c |
Which of these is an ion-channel receptor? a E |
b |
The binding of signal molecules to _____ results in the phosphorylation of tyrosines. a D |
e |
Which of these receptor molecules would allow Na+ to flow into the cell? a D |
a |
Which of these extracellular signal molecules could diffuse through a plasma membrane and bind to an intracellular receptor? a glycerol |
e |
A(n) _____ is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off. a carbohydrate |
b |
_____ is a signal molecule that binds to an intracellular receptor . a A |
b |
Thyroid hormones bind to _____ receptors. a G-protein-linked |
e |
A small, nonprotein, water-soluble molecule or ion, such as calcium ion or cyclic AMP, that relays a signal to a cell’s interior in response to a signal received by a signal receptor protein. |
second messenger |
Which of these is responsible for initiating a signal transduction pathway? |
a single molecule |
What role does a transcription factor play in a signal transduction pathway? a By binding to a plasma membrane receptor it initiates a cascade. |
d |
Which of the following, when activated by a signal transduction pathway, moves from the cytoplasm to the nucleus of a cell? a relay protein |
e |
Which of these is a membrane receptor? |
A receptor site that sits in the plasma membrane. |
A signal transduction pathway is initiated when a _____ binds to a receptor. a G protein |
d |
Which of these acts as a second messenger? a G protein |
e |
Calcium ions that act as second messengers are stored in _____. a mitochondria |
d |
_____ catalyzes the production of _____, which then opens an ion channel that releases _____ into the cell’s cytoplasm. a Adenylyl cyclase … cyclic AMP … Ca2+ |
c |
A protein kinase activating many other protein kinases is an example of _____. a deactivation |
e |
The cleavage of glycogen by glycogen phosphorylase releases _____. a galactose-1-phosphate |
e |
Epinephrine acts as a signal molecule that attaches to _____ proteins. a ion-channel receptor |
c |
Which of these is a receptor for calcium ions? a calmodulin |
a |
Which of these is NOT correct? a Kinases are enzymes that phosphorylate other molecules. |
d |
A toxin that inhibits the production of GTP would interfere with the function of a signal transduction pathway that is initiated by the binding of a signal molecule to _____ receptors. a ion-channel |
b |
Mastering Biology Chapter 11 Extra Credit Assignment
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