O Level Biology Practical 2020 Answers _best_

| Exam Series | Paper Code | Paper Type | Availability | |-------------|------------|------------|--------------| | May/June 2020 | 5090/61 | Alternative to Practical | Question paper + mark scheme available | | October/November 2020 | 5090/31 | Practical Test | Question paper available | | October/November 2020 | 5090/61 | Alternative to Practical | Question paper available |

After placing a variegated leaf in sunlight, the green areas (containing chlorophyll) turn blue-black with iodine, while white areas remain brown. Explanation:

The factor you measure (e.g., the time taken for the iodine solution to stop turning blue-black).

Sample B had the shortest time to change color, indicating the highest concentration of reducing sugar. Common Error: Failing to include units (e.g., ) in table headers. 3. Biological Drawings & Magnification o level biology practical 2020 answers

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Provide a list of all necessary food tests. Let me know how you'd like to narrow down the list .

Use a sharp HB pencil. Do not shade, sketch, or leave gaps in your lines. | Exam Series | Paper Code | Paper

Based on examiner feedback, here are the that lost marks:

| pH | Color Change | Amylase Activity | | --- | --- | --- | | 4 | Blue-black | Low | | 5 | Purple | Moderate | | 6 | Brown | High | | 7 | Yellow-brick red | Very high | | 8 | Yellow-brick red | Very high |

Plotting independent and dependent variables accurately, drawing lines of best fit. Common Error: Failing to include units (e

In some versions of the 2020 paper, students tested "urine" samples for glucose concentration using the . Time to color change (s) Final Color Estimated Glucose Concentration A Red precipitate High (e.g., 0.62 B Red precipitate Highest (e.g., 0.95 D

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