Question

Molecule that can be covalently linked to a non-immunogenic antigen to make it an immunogen is called a/an

Answer 1

HERE IS YOUR ANSWER

All immunogens are antigens, but all antigens may not be immunogens, some very small molecules called haptens can bind to antibodies or B-cell receptor but they cannot initiate an immune response

Answer 2

Carrier

Any molecule that can be linked to an non immunogenic antigen to make it an immunogen is called carrier.