Add equal volumes of Sample X and Benedict’s solution to a test tube. Heat in a boiling water bath for 2–3 minutes. Expected Observations & Interpretation: Blue solution: Reducing sugars absent.
HCl inhibited the browning enzyme, while cutting increased the surface area for oxidation. 💡 Practical Success Tips
This comprehensive guide breaks down the core questions, experimental setups, and definitive marking criteria for the , helping students maximize their marks in future lab assessments. Overview of the 2020 O Level Biology Practical Papers o level biology practical 2020 answers
Graphing : If asked to plot a graph, the independent variable (e.g., temperature or time) belongs on the x-axis, while the dependent variable (e.g., rate of reaction or color intensity) belongs on the y-axis. Experiment C: Plant Tissue Anatomy and Biological Drawing
A high-frequency practical involved measuring the rate of oxygen bubble production from liver/celery discs in hydrogen peroxide (H₂O₂), with varying pH or temperature. Add equal volumes of Sample X and Benedict’s
Why is the shoot cut underwater before assembly?
Saying "wear safety gear" is insufficient. Specify "wear safety goggles" to protect against chemicals. 5. Resources for Past Papers and Answers HCl inhibited the browning enzyme, while cutting increased
Magnification=Length of drawingLength of actual specimenMagnification equals the fraction with numerator Length of drawing and denominator Length of actual specimen end-fraction Answers were expected to be given to .