10. Cell Signaling

Signal Amplification

객관식
Phosphorylation __________.
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객관식
Kinases and phosphatases are essential to the cell because they:
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객관식
Which of the following best describes the process of signal amplification in a cell signaling pathway?
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객관식
A difference between the mechanisms of cAMP and Ca²⁺ in signal transduction is that cAMP __________ and Ca²⁺ __________.
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객관식
ATPgammaS is a form of ATP that cannot be hydrolyzed by enzymes. If this compound were introduced to cells so that it replaced the normal ATP present in the cell, which of the following would you predict?
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객관식
A mutation in the active site of adenylyl cyclase that inactivates it would most likely lead to __________.
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객관식
In liver cells, epinephrine stimulates the breakdown of glycogen. As the signal-transduction pathway progresses, __________.
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객관식
In eukaryotic cells, which of the following is a second messenger that is produced as a response to an external signal such as a hormone?
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객관식
What role do phosphatases play in signal transduction pathways?
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객관식
Second messengers tend to be water-soluble and small. This accounts for their ability to __________.
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객관식
Phosphorylation cascades are useful signal transduction pathways because they ________.
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객관식
In the inherited disorder Wiskott-Aldrich syndrome, __________.
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객관식
IP₃ (inositol trisphosphate) is produced as a result of __________.
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객관식
IP₃ (inositol trisphosphate) acts by __________.
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객관식
During the transduction of a signal, one molecule or ion may be closely associated with the activity of another. Which of the following pairs correctly combines two associated molecules?
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