Which Is NOT Correct Concerning the Accepted Models That Describe

question 46

Multiple Choice

Which is NOT correct concerning the accepted models that describe cooperative binding?

• A) In the sequential model, the binding of a ligand changes the conformation of the subunit to which it binds, in turn inducing a change in neighboring subunits.
• B) All known allosteric proteins exhibit either the concerted or sequential model exclusive of the other.
• C) Both models incorporate a low affinity T-state and a higher affinity R-state.
• D) Both models explain the sigmoid-shaped binding curve.
• E) In the concerted model, all molecules exist either in the T-state or the R-state.

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Definitions:

Quaternary

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Hemoglobin

A molecule found in red blood cells responsible for transporting oxygen from the lungs to the tissues throughout the body and bringing carbon dioxide from those tissues back to the lungs.

Metabolism

This is the set of life-sustaining chemical reactions in organisms, involving the conversion of food to energy, the elimination of nitrogenous wastes, and the synthesis of necessary compounds.

Triglycerides

A type of fat found in the blood, originating from foods or produced by the body, used for energy storage.