Multiple choice

Which of the following regions is responsible for antibody activity?

  1. Light chain constant

  2. Light chain variable

  3. Heavy chain constant

  4. Heavy chain variable

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  1.  Antigen-combining site of an antibody is at amino terminus.
    1.  It has both light and heavy chains.
    2. The amino acid sequence in aminoterminal is variable. This variable region determines immunological specificity.