O Level Biology Practical 2020 Answers [cracked]

Review: O Level Biology Practical 2020 – An Analysis of Answers and Exam Trends

Exam Session: October/November 2020 (Paper 5090/6 or Equivalent variants) Difficulty Rating: Moderate to Challenging

Sample B: Shortest time to change colour (~26s), indicating highest glucose concentration (~0.95 g/dm³). o level biology practical 2020 answers

• Volume change = 10 – 4 = 6 cm³
• Time interval = 90 – 30 = 60 seconds
• Rate = 6 cm³ / 60 s = 0.1 cm³/s

Key Table Requirements: Answers had to include correct headings (e.g., "Time taken for color change / s") and consistent units. Question 2: Biological Drawing and Magnification Review: O Level Biology Practical 2020 – An

Pro tip: 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. Volume change = 10 – 4 = 6

The examination typically consisted of two to three compulsory questions designed to test various scientific skills. Question 1: Excretion & Glucose Concentration

Tables: Ensure all raw data is recorded to the same degree of precision (e.g., all times to the nearest second).