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Biology Practical 2025
Summary of O level Combined Biology Practical from 2005 to 2023
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Practical Notes
1a: Biological drawing
1b: Examples of common Biological drawings ***
1c: Prepare animal and plant slide***
2a: Movement of substances in potato strips (osmosis) [2011, 2017] ***
2b: Movement of substances using visking tubing [2008]***
2c: Movement of substances (average change in diameter of eggplant and Chinese leek)***
3a: Nutrients (Food test)
3b: Samples of Food test results [2012, 2016, 2006]***
3c: Energy in food [2010, 2023]
3d: Test for bile salts *** (for more information)
4a: Effect of temperature on enzyme activity (catalase and hydrogen peroxide) [2016]***
4b: Enzyme (digestion of starch by amylase) [2008, 2019]
4c: Effect of pH on rate of enzyme activity***
4d: Effect of temperature on breakdown of fats in milk by lipase [2015] ***
5a: Plant nutrition (Test starch in leaf) [2005, 2013]***
5b: Plant Nutrition (Effect of light on rate of photosynthesis) [2014]***
6a: Photosynthesis and respiration [2012]***
6b: Respiration (Goat's respiratory tract) ***
7a: Transpiration [2006]***
7b: Capillary action, stained xylem [2018]
7c: Respiration (Seed germination) [2009]
8a: Reproduction in Plant [2007]***
9: Planning Experiment
Pure Bio 1: Homeostasis ***
Pure Bio 2: Serial dilution and determining concentration of unknown solution using colour standard ***
Biology Practical 2025
1c: Prepare animal and plant slide***
How to use the microscope
Slides that the students prepare
Onion cells
Cheek cell
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