BIO 108 Lab Midterm 2026 180 Questions – Experimental Design Microscopy Osmosis Enzymes Answers, Biology

This document provides an extensive collection of approximately 180 lab-based midterm exam questions and answers for BIO 108, focusing on experimental design, microscopy, diffusion and osmosis, enzyme activity, and photosynthesis. The content is structured in a clear question-and-answer format, making it an effective resource for reinforcing laboratory concepts and preparing for practical and theory-based assessments. The material offers in-depth coverage of essential laboratory principles, including hypothesis formation, variables (independent, dependent, controlled), experimental and control groups, and scientific methodology (pages 1–3). It also thoroughly explores microscopy techniques such as magnification, resolution, field of view, and depth of field, alongside detailed explanations of diffusion, osmosis, tonicity (isotonic, hypotonic, hypertonic), and membrane transport processes (pages 4–7). Additionally, the document covers key biochemical and physiological lab topics, including enzyme activity under varying temperature and pH conditions, photosynthesis equations, chromatography, spectrophotometry, and pigment analysis (pages 8–12). Further, the resource includes detailed explanations of cell division (mitosis stages and chromosome behavior), lab calculations (e.g., resolution formulas, Rf values), and experimental interpretation skills such as analyzing diffusion experiments and enzyme reactions (pages 13–19). These elements make it highly valuable for understanding both theoretical concepts and their practical applications in a laboratory setting. This document is ideal for undergraduate students enrolled in introductory biology lab courses such as BIO 108, General Biology Lab, Cell Biology Lab, and Life Sciences laboratory courses. It is particularly useful for first-year university students preparing for lab midterms, practical exams, or quizzes, as well as for revision and concept mastery. It may also benefit advanced high school students taking AP Biology with a laboratory component. The material aligns closely with widely used textbooks such as Campbell Biology by Lisa A. Urry et al., particularly chapters related to scientific methods, cell biology, and metabolism. It serves as an excellent companion to laboratory manuals, lecture notes, and practical exercises. Keywords: biology lab exam, experimental design, hypothesis testing, variables biology, microscopy, magnification, resolution, diffusion, osmosis, tonicity, enzyme activity, photosynthesis, chromatography, spectrophotometry, mitosis, cell division, lab techniques, membrane transport