Beetroot experiment Study guides, Revision notes & Summaries

What is the premise behind the experiment? - ANSWER- Cell surface membranes made of phospholipid bilayer > selectively permeable. This can be changed by variables like temp and solvent conc. - As temp increases, enzymes like transport proteins lining the membrane may denature, allowing the red pigment to leave the membrane as it is now permeable to more susbstances. - Membrane permeability is measured using beetroot cells, which contain a purple pigment. When membranes are more permeable, ...

1. Why do we use beetroot cells to measure the effect of different variables on membrane permeability? 2. If a lot of pigment leaks out, what does this tell us about the membrane permeability? 3. If only a little amount of pigment leaks out, what does this tell us about membrane permeability? - ANSWER1. Because beetroot cells contain a coloured pigment (dark red/ purple), that leaks out. 2. High membrane permeability 3. Low membrane permeability State the independent variable, d...

PAG 5.1, 8.1, 8.3 Questions and Answers | Latest Version | Graded A+ **Question:** What is the procedure for PAG 8.3 (Effect of detergent on plasma membrane permeability)? **Answer:** To conduct PAG 8.3, follow these steps: 1. Prepare a serial dilution starting from a 10% stock solution. 2. Label beakers and test tubes with the corresponding concentrations. 3. Cut beetroot into 30mm pieces. 4. Measure 20cm3 of each concentration using a syringe and fill labeled test tubes. 5. P...

Students’ Lab Book for AQA AS & A-Level Biology 7401/7402 Covers the complete CPAC requirements for the investigation skills relevant to examinations 2 CONTENTS How to use this Lab Book – notes to teachers 9 - notes to students 12 - Practical and mathematical skills grid 13 Skills development requirements 14 Mathematical requirements & exemplifications 16 Glossary of terms 19 Suggested templates for skills development 21 (research, planning, concluding & evalu...

CONTENTS How to use this Lab Book – notes to teachers 9 - notes to students 12 - Practical and mathematical skills grid 13 Skills development requirements 14 Mathematical requirements & exemplifications 16 Glossary of terms 19 Suggested templates for skills development 21 (research, planning, concluding & evaluating) Data Tables 27 Significant figures 28 Uncertainties 29 Graphs/Bar Charts/Histograms 32 Biological drawings 41 Statistical tests 43 PART 1 AS and A-Level Investigati...

2.5 Biological Membranes YOUR NOTES 2.5.1 THE CELL SURFACE MEMBRANE Roles of Membranes Membranes are vital structures found in all cells The cell surface membrane creates an enclosed sp ace separating the internal cell environment from the external environment Intracellular membranes (internal membranes) form compartments within the cell, such as organelles (including the nucleus, mitochondria and RER) and vacuoles Membranes not only separate different areas but also control the exchange of mate...

The information provided discusses a series of laboratory practical tests designed for AQA Biology students. These tests cover topics such as membrane permeability using beetroot pigment release and investigating the effectiveness of antimicrobial substances on bacterial growth, providing hands-on experience aligned with the AQA Biology curriculum.The document contains detailed procedures for various AQA Biology practical experiments, including steps for conducting each experiment, identifying i...

IA awarded a grade of 7 in the IB. Includes all parts needed.