Answer:
Each B cell produces a single species of antibody, each with a unique antigen-binding site
Explanation:
The correct option is C, PROTEINS.
Protein are macro molecules which are made up of units called amino acids. There are twenty different amino acids, each with a unique R group. The elements find in protein include carbon, oxygen, nitrogen, etc. Nitrogen is one of the most important constituent of proteins. <span />
Both phenotypes will be shown.
