BTL2 study guide
BTL2 · Work through your exam, one topic at a time.
BTL2 is a professional-level biotechnology certification exam organized around four equally weighted domains: cell biology and biochemistry, molecular biology and genetics, microbiology and immunology, and biotechnology applications and bioprocessing. It is aimed at candidates who already hold a foundation in the life sciences - laboratory technicians, research assistants, quality-control staff, and graduates moving into biomanufacturing or applied research roles - and who want independent evidence that their knowledge spans both bench science and production practice. The exam tests understanding rather than isolated recall: expect to interpret experimental results, reason about assay design, and connect molecular mechanisms to process decisions such as sterilization, contamination control, and scale-up. Because the four domains carry equal weight, a candidate who is strong in molecular biology but weak in bioprocessing will lose ground quickly, so plan study time across all four rather than deepening only one. The BTL2 study guide has 4 sections and about 1,199 words.
01Cell Biology and Biochemistry: Membranes, Energy, and Information Flow
A candidate must be able to move between the molecular and the cellular scale. Know the four macromolecule classes and the bond that defines each (peptide, phosphodiester, glycosidic, ester).
319 words, about 2 min02Molecular Biology and Genetics: Replication, Expression, and Inheritance
Build a single coherent picture from DNA to phenotype. Know semiconservative replication: helicase unwinds, primase lays RNA primers, DNA polymerase III extends 5' to 3' on the leading strand continuously and the lagging strand in Okazaki fragments, ligase seals nicks.
301 words, about 2 min03Microbiology and Immunology: Pathogens, Host Defense, and Control
Separate the microbial groups by structure. Bacteria are prokaryotes with peptidoglycan cell walls (Gram-positive thick, Gram-negative thin plus outer membrane with LPS), 70S ribosomes, and no membrane-bound nucleus.
295 words, about 1 min04Biotechnology Applications and Bioprocessing: From Molecule to Product
Trace a product from construct to release. Recombinant DNA work uses restriction enzymes (palindromic cut sites producing sticky or blunt ends), ligase, vectors with origin of replication, selectable marker, and promoter, and transformation methods (heat shock, electroporation, transduction).
284 words, about 1 min