O Level Biology Practical 2020 Answers Jun 2026

Observation : The water-bath at 80°C shows the highest intensity of red coloration.

: Higher temperatures damage cell membranes more extensively, leading to a darker red solution as more pigment leaks out. General Practical Guidelines

The first question typically requires students to set up an experiment, record data over time, and interpret the biochemical principles at play. In the 2020 paper, the investigation revolved around plant tissues and their interactions with specific solutions. Experimental Setup and Methodology o level biology practical 2020 answers

Example: "Describe the colour of the banana slice after 20 minutes."

Express the final answer clearly with a multiplication sign (e.g., ×15cross 15 ×4.5cross 4.5 ). Round to one decimal place if necessary. ⚠️ Critical Sources of Error and Practical Improvements Observation : The water-bath at 80°C shows the

: Using Benedict's solution to identify glucose concentrations in "urine" samples. Citrus Fruit Analysis

Accurate sketching, magnification, and measuring structures. 2. 2020 Biology Practical 5090/32 - Detailed Breakdown In the 2020 paper, the investigation revolved around

Magnification=Size of Image (Drawing)Size of Actual SpecimenMagnification equals the fraction with numerator Size of Image (Drawing) and denominator Size of Actual Specimen end-fraction