Question

_____ region of alpha and beta chains of TCR forms pathogen-specific binding site, whereas _____ region anchors molecule on cell surface:

a. constant; variable
b. effector; constant
c. carboxy-terminal end; amino-terminal end
d. complement; effector
e. variable; constant.

Answer 1

The variable region of the T cell receptor forms the pathogen-specific binding site, while the constant region anchors the molecule on the cell surface.

Step-by-step explanation:

The region of the alpha and beta chains of the T cell receptor that forms the pathogen-specific binding site is the variable region.

This region is furthest away from the T cell membrane and its amino acid sequence varies between receptors. On the other hand, the region that anchors the T cell receptor on the cell surface is the constant region. The constant region has less variation and it spans the membrane of the T cell.