O Level Biology Practical 2020 Answers ((link))

Use to carefully grasp the banana slice. Ensure the forceps are clean and dry before use. Lift the slice slowly to avoid splashing acid, and gently drain excess acid by holding the slice over the beaker before transferring it to the white tile. Always wear safety goggles and wash hands after handling.

Expected Observations : A color change from yellowish-brown to blue-black indicates the presence of starch. Experiment B: Enzyme Catalysis (Amylase or Catalase) o level biology practical 2020 answers

Repeating the experiment at least three times to calculate a reliable average and identify anomalies. Key Strategies for Success in O-Level Biology Practicals Use to carefully grasp the banana slice

Expected graphs plotted "Time taken for color change" against "Concentration of glucose". Drawing & Identification: o level biology practical 2020 answers