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Investigations in post-16 biology
These reliable practicals from SAPs allow students to practice a range of skills, such as microscopy skills, serial dilutions, plotting and using standard curves and developing mathematical skills. These investigations were designed for students following a Scottish Highers course but they are equally useful for other post-16 courses in biology. Some could even be adapted for secondary students of a younger age.
The investigations include:
- Investigating the hormone auxin (IAA), a plant growth regulator
- Fruit juice production and enzyme recovery
- What determines the number of spines on a holly leaf?
- The effect of phosphate on the enzyme phosphatase
- Stomatal opening and closing in commelina communis
- The response of leaf discs to green light
- The effects of IAA on root growth
- Competitive and non-competitive enzyme inhibition
- Estimating the glucose concentration of a solution
- The effects of mineral concentrations on plant growth
- Investigating potato cyst nematodes
- Examining mycorrhizae
- Protoplast isolation
- Investigation enzymes: microscale investigations with catalase
- Investigating enzymes: inhibition of catechol oxidase in bananas
- Investigating enzymes: phosphatase enzymes in plants
- Investigations into eutrophication
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Stomatal opening and closing in commelina communis
Produced by Science & Plants for Schools (SAPS), this investigation looks at stomatal opening and closing in Commelina communis (Asiatic dayflower). This is achieved by varying the turgor of the guard cells by bathing lower epidermal peels in solutions of different osmotic strengths. Changes in guard cell...
The response of leaf discs to green light
Produced by Science & Plants for Schools (SAPS), this investigation enables students to investigate the response of leaf discs from sun and shade plants to green light
Leaf discs from a sun plant and a shade plant are put in a sodium hydrogen carbonate solution. The rate of photosynthesis is seen by how...
The effects of IAA on root growth
Produced by Science & Plants for Schools (SAPS), this activity enables students to investigate the effects of the plant hormone indole acetic acid (IAA) on root growth in mustard seedlings.
Different concentrations of IAA appear to have differing effects on root growth. These effects may vary from one...
Competitive and non-competitive enzyme inhibition
Produced by Science & Plants for Schools (SAPS), this activity enables students to investigate the effect of competitive and non-competitive inhibitors on the enzyme beta-galactosidase.
The chemical ONPG (o-nitrophenyl beta-D-galactopyranoside) is degraded by the enzyme beta-galactosidase. The product is...