In Reference to the Interaction Between T-Cell Receptors and Their

question 67

Multiple Choice

In reference to the interaction between T-cell receptors and their corresponding ligands,which of the following statements is correct?

• A)The organization of the T-cell receptor antigen-binding site is distinct from the antigen-binding site of immunoglobulins.
• B)The orientation between T-cell receptors and MHC class I molecules is different from that of MHC class II molecules.
• C)The CDR3 loops of the T-cell receptor α and β chains form the periphery of the binding site making contact with the α helices of the MHC molecule.
• D)The most variable part of the T-cell receptor is composed of the CD3 loops of both the α and β chains.
• E)All of the above statements are correct.

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Definitions:

Chemical Energy

The potential of a chemical substance to undergo a transformation through a chemical reaction or to transform other chemical substances.

Mechanical Energy

The sum of potential and kinetic energy in physical systems, often involved in performing work or causing motion.

Kinetic Energy

The energy that an object possesses due to its motion, which is dependent on the mass of the object and the square of its velocity.

Heat Energy

Energy that results from the random movement of atoms, ions, or molecules; the greater the amount of heat energy in an object, the higher the object’s temperature.