Question is ⇒ The major second messengers are, Options are ⇒ (A) cAMP, (B) cGMP, (C) DAG, (D) All of these, (E) , Leave your comments or Download question paper.

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Question is ⇒ The major second messengers are, Options are ⇒ (A) cAMP, (B) cGMP, (C) DAG, (D) All of these, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The major second messengers are
A.	cAMP [Wrong Answer]
B.	cGMP [Wrong Answer]
C.	DAG [Wrong Answer]
D.	All of these [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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Also Read Similar Questions Below :

⇒ Which of the following is not a type of signaling molecule?
Testosterone
Insulin
Thyroxin
Adenylate cyclase

⇒ Which of the following comes under the category of cell surface receptor?
Enzyme linked receptors
Ion-channel linked receptors
G protein linked receptors
All of these

⇒ Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?
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Signal integration
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⇒ Simple nerve reflexes use signaling molecules called
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phosphodiesterase C
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⇒ 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

⇒ Which of the following statement is incorrect?
The principal lipophilic hormones that binds to receptors located in the plasma membranes are prostaglandins
Prostaglandins are synthesized from arachidonic acid
Prostaglandins act as paracrine signaling molecules
None of the above

⇒ Which of the following statements about G proteins is false?
They are involved in signal cascades
They bind to and are regulated by guanine nucleotides
They become activated when bound to GDP
They must be active before the cell can make needed cAMP

⇒ A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?
It is in the heart muscle
It is also the site of production for the signaling molecule
It contains the receptor for the signaling molecule
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⇒ 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
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⇒ The hormone or ligand can be considered as
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⇒ In vasodilation, proper nerve signals sent to blood vessels cause
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relaxation of smooth muscle cells
reduced blood pressure
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⇒ In paracrine signaling, the signaling molecules affects only
target cells close to the cell from which it was secreted
target cells distant from its site of synthesis in cells of an endocrine organ
both (a) and (b)
none of the above

⇒ The signaling molecules called steroid hormones
are made in one location of the body but have their effects some distance away
are hydrophilic and so cannot penetrate the plasma membrane
bind to cell surface receptors to trigger chemical cascades
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⇒ When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .
signaling molecule; receptor; G proteins
signaling molecule; target cell; G proteins
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⇒ Small charged molecules, often biogenic amines function as
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⇒ Two key organizing principles for large multicellular organisms are
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⇒ 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
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⇒ Which of the following is true about a hydrophilic signaling molecule?
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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
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⇒ SH₂ domains specifically bind to
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⇒ Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?
Because other body tissues use a different signaling molecule
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cGMP
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⇒ What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?
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⇒ Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it
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interferes with chemical cascades that trigger contraction of heart muscle
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⇒ Which of the following statement is correct?
Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
Cell communicate with one another in unicellular organisms using extracellular signaling antigen and antibody
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