Membrane Structure Practical. Question: Other than as carrier proteins state two functions of membrane bound proteins (2). Receptors Enzymes Structural.

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Presentation transcript:

Membrane Structure Practical

Question: Other than as carrier proteins state two functions of membrane bound proteins (2). Receptors Enzymes Structural (attached to microtubules) Click here to hide answers Click to reveal answers

Components of the membrane

Membrane Permeability practical Learning Objectives Outline the effect of changing temperature on membrane structure and permeability Completing quantitative, qualitative and evaluative tasks Success Criteria Produce a table which fulfils quantitative assessment criteria. Produce a graph and write conclusions to fulfil qualitative and evaluative assessment criteria

Beetroot practical Quantitative Task – Practical skills in Biology 1 Record all your raw data in the most suitable form in the space provided on page 2 (5 marks) Qualitative Task – Practical skills in Biology 1 Looking at the depth of colour from each of the temperatures, which temperature do you think affects membrane permeability the most? (2 marks) Evaluative task – Practical skills in Biology 1 Plot a suitable graph on the graph paper provided (3 marks) Use your raw data and graph to describe the trends (2 marks) Outline the conclusions that can be made from your results (2 marks) Assess the validity (accuracy, precision and reliability) of the conclusions that you have drawn using the raw data you have been presented with. (3 marks)

Question 3: Describe an experiment by which you could test to see whether alcohol concentration affected membrane permeability (5). Same volume discs of beetroot Same volume of alcohol Same temperature Same time in alcohol Range of alcohol concentrations Use colourimeter to read amount of pigment in solution Graph of colour intensity (% absorbance etc.) over alcohol concentration Click here to hide answers Click to reveal answers

Homework Basic membrane structure and Fluid mosaic model in the booklet