What functions in a cell are performed by proteins and nucleic acids?

Proteins perform the following functions in a cell:
– structural (are part of the cellular structures);
– enzymatic (accelerate chemical reactions in cells);
– hormonal (hormones regulate and coordinate metabolism in different cells of the body, some of them are proteins, for example, insulin and glucagon);
– receptor (this function consists in the selective binding of hormones, biologically active substances and mediators on the surface of membranes or inside cells);
– transport (proteins carry substances in the blood, for example, hemoglobin (oxygen transport), proteins transport cations of calcium, magnesium, iron, copper and other ions in the blood.
– contractile function (actin, myosin);
– protective (blood immunoglobulins prevent the infectious process and maintain the body’s stability).

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