Bacterial Identification Virtual Lab 2026 – 18 Exam Questions – PCR, Sequencing & BLAST Analysis – Molecular Biology

This document contains 18 exam questions and 100% correct answers for the Bacterial Identification Virtual Lab 2026 assessment. It focuses on the second PCR (cycle sequencing), fluorescence-tagged terminators, gel electrophoresis principles, DNA charge movement, sequence matching analysis, BLAST interpretation, homology concepts, E-values, and final species identification. The material follows the molecular workflow used in bacterial DNA identification, including PCR amplification, production of variable-length DNA fragments during sequencing reactions, electrophoretic separation based on fragment size, and bioinformatics comparison using BLAST (Basic Local Alignment Search Tool). It reinforces understanding of conserved vs. variable regions, sequence alignment scoring (bits), evolutionary assumptions based on nucleotide differences, and interpretation of statistical significance in database matches. This study guide is particularly suitable for: Microbiology students Molecular biology students Genetics students Biotechnology trainees Pre-health and biomedical science majors Clinical laboratory science students It is relevant for courses such as: General Microbiology Lab Molecular Biology Laboratory Genetics and Genomics Biotechnology Techniques DNA Sequencing and Bioinformatics Clinical Microbiology The structured question-and-answer format supports exam preparation, virtual lab assessments, and practical understanding of molecular diagnostic tools used for bacterial species identification. The final organism identified in this lab is Bartonella henselae, reinforcing real-world application of PCR and sequence alignment technologies in pathogen identification. Keywords: Bacterial Identification Virtual Lab, PCR Sequencing, Cycle Sequencing, Fluorescent Terminators, Gel Electrophoresis, DNA Charge Movement, BLAST Analysis, Homology, E-value Interpretation, Sequence Alignment, 16S rDNA, Molecular Diagnostics, Bartonella henselae, DNA Amplification, Bioinformatics