The binding site for an antigen is located in which region of an antibody? 1.Between the variable ...

The binding site for an antigen is located in which region of an antibody?
  1.Between the variable region of the light chain and the variable region of the heavy chain.
  2.Between the variable region and the constant region of the light chain.
  3.Between the variable region and the constant region of the heavy chain.
  4.Between the constant region of the light chain and the constant region of the heavy chain.

Question 2

How do innate and adaptive immunity differ?
  1.Adaptive immunity is a short-term response while innate immunity lasts long-term.
  2.Innate immunity is more specific to antigen type than adaptive immunity.
  3.Adaptive immunity can take advantage of a large array of potential receptors, while innate immunity has a fixed number of receptor types.
  4.Adaptive immunity can occur quickly, while innate immunity requires a longer time to develop.