____ are proteins that are crucial to body's communication process. These are present in cell membranes but a small active part of it projects out of the membrane.

Lipids

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Enzymes

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Synapses

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Receptors

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Solution

The correct option is D Receptors
A receptor is a protein molecule usually found embedded within the plasma membrane surface of a cell that receives chemical signals from outside the cell.

Receptors are protein molecules in the target cell or on its surface that bind ligands.

Option D is correct.

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____ are proteins that are crucial to body's communication process. These are present in cell membranes but a small active part of it projects out of the membrane.

The correct option is D ReceptorsA receptor is a protein molecule usually found embedded within the plasma membrane surface of a cell that receives chemical signals from outside the cell.Receptors are protein molecules in the target cell or on its surface that bind ligands.Option D is correct.

The correct option is D Receptors
A receptor is a protein molecule usually found embedded within the plasma membrane surface of a cell that receives chemical signals from outside the cell.

Receptors are protein molecules in the target cell or on its surface that bind ligands.

Option D is correct.