"each lymphocyte has thousands of receptor proteins in its membranes. what is the job of these receptor proteins? "

Some of these receptors bind to antigens in the blood. The antigen are then endocytosed and identified.  Some of the receptors such as the MHC II are used in antigen-presentation. They display the antigen for identification and activation of other lymphocytes.

b.have there own function.

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;