Discovery and biotherapeutics

Antibody Engineering interview questions

Antibody binding, formats, specificity, affinity and manufacturability.

6 questions, each with a worked answer

What is the difference between affinity and avidity? Fundamentals Concept
How would you test whether an antibody binds specifically to its intended antigen? Intermediate Scenario
How does epitope density affect apparent avidity? Intermediate Concept
When are antibody competition experiments informative? Intermediate Concept
What controls help distinguish specificity from nonspecific sticking? Advanced Scenario
Why might higher affinity reduce performance in a cell-based assay? Advanced Concept

About Antibody Engineering

Antibody engineering designs and improves antibodies for therapy, diagnostics and research. It covers discovery from immunised animals or display libraries, humanisation, affinity maturation and formats such as bispecifics, fragments and antibody-drug conjugates. Binding strength is only one property: specificity, effector function, stability and manufacturability decide whether a molecule can become a product.

Developability is assessed early because problems found late are expensive.

Fundamentals: 1
Intermediate: 3
Advanced: 2

What these questions test

Characterize antibody specificity: Test affinity, selectivity and cross-reactivity using orthogonal evidence.

References

NCBI Bookshelf. National Library of Medicine. ncbi.nlm.nih.gov/books.
pmc.ncbi.nlm.nih.gov/articles/PMC13240941.
pmc.ncbi.nlm.nih.gov/articles/PMC11352713.
nature.com/articles/s41596-024-01079-8.
pubmed.ncbi.nlm.nih.gov/33928235.

Practice material written by TheBench.Bio and checked against the references above, reviewed October 23, 2026. Written to practise with, not collected from real interviews.