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Cell Signalling and Transduction

Cell Signalling and Transduction
Which of the following is not a type of signaling molecule?

Adenylate cyclase
Insulin
Testosterone
Thyroxin

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Cell Signalling and Transduction
The major second messengers are

cGMP
DAG
cAMP
All of these

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Cell Signalling and Transduction
The hormone or ligand can be considered as

both (a) and (b)
first messenger
none of these
second messenger

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Cell Signalling and Transduction
In paracrine signaling, the signaling molecules affects only

target cells distant from its site of synthesis in cells of an endocrine organ
None of these
both (a) and (b)
target cells close to the cell from which it was secreted

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Cell Signalling and Transduction
Simple nerve reflexes use signaling molecules called

G proteins
proteases
neurotransmitters
nitric oxides

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Cell Signalling and Transduction
The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

lipokinase
phospholipase C
phosphokinase C
phosphodiesterase C

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