Question

Complementarity determining regions:

A Are restricted to light chains.
B Are in the constant part of the Ig molecule.
C Bind to Fc receptors.
D Are concerned in antigen recognition.
E Occur at the C-terminal end of the Ig peptide chains.

Answer 1

The complementarity determining regions (CDRs) occur in both heavy and light chains of antibodies and are responsible for antigen recognition.

Step-by-step explanation:

The complementarity determining regions (CDRs) are not restricted to light chains, but actually occur in both the heavy and light chains of antibodies. They are located in the variable regions of the antibody molecule, which are responsible for antigen recognition.

The CDRs make up the antigen-binding site of the antibody and have high variability in amino acid sequence, allowing for the recognition of different antigens.