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Biochemistry - Cell Signalling and Transduction

Exercise : Cell Signalling and Transduction - Section 1
  • Cell Signalling and Transduction - Section 1
11.
Which of the following is true about a hydrophilic signaling molecule?
Its receptor is located in the cytosol of the target cell
It might trigger a signal cascade that causes some effect in a cell
Since it can enter the cell, it directly affects some specific cell process
It is a steroid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
cAMP and cGMP are derived from
ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively
GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively
ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it
mimics the action of signal receptors
is broken down into hormones that affect the heart
interferes with chemical cascades that trigger contraction of heart muscle
breaks down into nitric oxide, which increases blood flow to the heart
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
If a disease of the blood vessels caused the endothelial cells of the vessel to die, what effect would that have on the cellular activities associated with vasodilation?
Nitric oxide would no longer be produced
Smooth muscle cells could not be made to relax
It would be more difficult to increase blood flow and reduce blood pressure
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?
They destroy the receptors for key signaling molecules
They prevent the production of key signaling molecules
They alter the chemical structure of key signaling molecules
They block the normal functioning of signal transduction mechanisms
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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