8.3 Patterns In Nature
Plan, choose equipment ore resources and finish a first hand investigation to gather data and use available evidence to identify the following substances in tissues:
- Glucose
- Starch
- Lipids
- Proteins
- Chloride ions
- Lignin
Experiment: Chemicals in Cellular Tissue
Aim: To use symptomatic tests to determine wether the following chemicals are present in apple, potato and tuna cellular tissue: glucose, starch, lipids as oils, protein, sodium chloride salt, and lignin.
surmisal: Apple, potato and tuna do not contain whatever of the above chemicals.
Method:
1. The cellular tissue willing motif to be mashed into pulp. A small amount of distilled water will need to be added to this pulp ONLY FOR glucose sodium and chloride tests.
2. account book colour changes in a table.
3. Test glucose by adding a some drops of benedicts solution to a sample distribution of apple in a test pipage because lightly heat over flame.
And so on…
| raise |Reagent |Treatment |Result |
|Glucose |Benedicts solution |Add a few drops to a sample in a test tube and |Turns orange |
| | |warm gently over a bunsen flame.
| |
|Starch |Iodine solution |Add a few drops to sample in a testube |Turns Black/purple |
|Lipids | brownness paper |Rub a small sample onto the core group of the paper|Paper turns clear/ transparent |
| | |and hold up to the light | |
|Protein |Biuret Reagents (sodium hydroxide)|Danger: Caustic...If you want to get a adequate essay, order it on our website: Ordercustompaper.com
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