O Level Biology Practical 2020 Answers 【No Survey】
| Sucrose (M) | Final length (mm) | Change (mm) | | :--- | :--- | :--- | | 0.0 | +3 | Increase | | 0.2 | +1 | Increase | | 0.4 | 0 | No change | | 0.6 | -2 | Decrease | | 0.8 | -4 | Decrease |
: Slices of banana were subjected to three treatments: immersion in dilute hydrochloric acid (HCl), mechanical chopping into small pieces, or left completely untreated as a control. Suggested Data & Answers :
Plotting independent and dependent variables accurately, drawing lines of best fit. o level biology practical 2020 answers
It improves the of the results by minimizing the effect of anomalies or outliers.
A student tested a solution X. Benedict’s test remained blue. Iodine test turned blue-black. Biuret test remained blue. Ethanol emulsion test remained clear. Identify X. | Sucrose (M) | Final length (mm) |
The exam typically consists of two to three experiments or investigations, each assessing different aspects of biological inquiry.
Calculations required measuring the realistic length of the specimen and including proper units (cm/mm). 2. 5090 Alternative to Practical (Paper 6) A student tested a solution X
Don’t just memorize answers. Learn why iodine turns blue-black (amylose helix trapping iodine) and why catalase works best at pH 7. That’s how you beat the 2021, 2022, and 2023 practicals too.
Osmosis/diffusion experiments (e.g., potato/tissue mass changes)