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ella [17]
2 years ago
10

.............................................................................

Biology
1 answer:
Paraphin [41]2 years ago
8 0

Answer:

thanks for this information but it seems like a great opportunity to work

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Which molecule is a first messenger but not a second messenger
k0ka [10]

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Hormones act as first messenger but not as second messengers.

Explanation:

Second messenger act as signaling molecule which are secreted in response to various biological signals generated by first messenger such as hormones,neurotransmitters etc.Second messengers include various bioactive molecules such as cyclic AMP(cAMP),cyclic GMP(cGMP),inositol triphosphate(IP3),diacylglycerol(DAG),calcium ions(Ca2+) etc.

         Hormones are extracellular signaling molecules whereas second messengers are intracellular signaling molecules.

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How is osmosis difrent from diffusan
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Osmosis<span> is the phenomenon of the movement of Solvent molecules from lower solute conc. to higher solute conc. through a semi-permeable membrane to make solute conc. equal on both sides.</span>
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Organelle A is chloroplasts

Organelle B is the vacuole

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I don’t exactly understand what it means on which one is correct, but I hope this helps you.

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B) electron microscope ,
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