It should be determined that how is hormone binding to its receptor more like an allosteric regulator binding to an enzyme than a substrate binding to an enzyme. Concept Introduction: Hormones are chemical substances synthesized in small amounts by endocrine tissues and carried by blood stream to another tissue, where it acts as a messenger to regulate the function of the target tissue or organ. A given hormone usually affects only a limited number of cells, which are called target cells and it responds to a hormone because it bears receptors for the hormone. Enzymes are proteins that increase the rate of reaction by lowering the energy of activation and so they are known as “biological catalysts” Allosteric (means “other site”) enzymes have two receptor sites in which one site fits the substrate like other enzymes and the other site fits an inhibitor or activator molecule. Secondary messengers are short lived intracellular signaling molecules. Elevated concentration of these types of messengers leads to rapid alteration in the activity of one or more cellular enzymes.

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Chapter 28, Problem 28.27AP

Interpretation Introduction

Interpretation:

It should be determined that how is hormone binding to its receptor more like an allosteric regulator binding to an enzyme than a substrate binding to an enzyme.

Concept Introduction:

Hormones are chemical substances synthesized in small amounts by endocrine tissues and carried by blood stream to another tissue, where it acts as a messenger to regulate the function of the target tissue or organ.

A given hormone usually affects only a limited number of cells, which are called target cells and it responds to a hormone because it bears receptors for the hormone.

Enzymes are proteins that increase the rate of reaction by lowering the energy of activation and so they are known as “biological catalysts”

Allosteric (means “other site”) enzymes have two receptor sites in which one site fits the substrate like other enzymes and the other site fits an inhibitor or activator molecule.

Secondary messengers are short lived intracellular signaling molecules. Elevated concentration of these types of messengers leads to rapid alteration in the activity of one or more cellular enzymes.

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