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Question

Signalling between cells usually results in activation of protein by

A
Kinases
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B
Proteases
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C
Lipases
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D
Nucleases
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Solution

The correct option is A Kinases
Signalling is the communication between cells by means of signalling molecules. When a ligand binds to its receptor, ligand-receptor complex is formed which activate protein kinases. Kinases are the enzymes that transfer phosphate group to the target cells. Phosphorylation of target cells cause different changes in the cell.
So, the correct answer is 'Kinases'.

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