Answer :
Question: Horseradish Peroxidase is bound to?
Explanation:
Remember that Horseradish Peroxidase or HRP is typically conjugated to an antibody, protein A, protein G, or avidin, although HRP can readily be conjugated to a wide range of different types of molecules. On the other hand, HRP is often conjugated with secondary antibodies in immunochemical.
Answer: we can conclude that the correct answer is:
1. Secondary antibodies.
2. Protein A.
3. Protein G.
4. Avidin.