Summary A Level Biology- Practical Guide

A guide for Biology practicals at AS- a summary of practical investigations from across the year. This is designed for AS3, but involves content from across the course. Colour coded document. Includes the following: Biochemical Food Tests Chromatography and Rf Values Effect of Temperature, pH, and Enzyme Concentration on Enzyme Action Dilution (Simple and Serial) Using a Colorimeter (including Calibration Curves) The Impact of Temperature on the Permeability of Cell Membranes in Beetroot Cell Fractionation Measuring Cell Length Using an Eyepiece Graticule and a Stage Micrometer Stains (including Iodine and Methylene Blue) Measuring the Average Water Potential of Cells in Plant Tissue Measuring the Average Solute Potential of Cells at Incipient Plasmolysis Preparing Root Tip Squashes (Mitosis and Meiosis) Block Diagrams Using a Respirometer to Calculate Oxygen Uptake and Carbon Dioxide Production The Heart Ecology Validity and Reliability