This question tests your ability to use universal indicator paper correctly and record a value.
Understanding the structural breakdown and underlying scientific principles of past papers like the 2020 session is one of the most effective ways to prepare for upcoming practical examinations. Overview of the 2020 Biology Practical Exam
(Note: This analysis focuses on the widely sat format. If you are sitting a different exam board, the concepts regarding planning and data analysis will still apply.)
"Human error" or "misreading the stopwatch" are never accepted.
To investigate the effect of light on the growth of radish seeds. o level biology practical 2020 answers
Benedict’s solution changes color based on concentration: Blue →right arrow →right arrow →right arrow →right arrow Brick-red.
Water moves from a higher water potential (inside the cell) to a lower water potential (outside) via partially permeable membranes. 3. General Tips for Answering Practical Papers
The experiment involved three treatments: a banana slice dipped in to lower the pH, a slice cut into small pieces to increase surface area, and an untreated slice as a control.
Ensure the independent variable (e.g., Temperature) is in the first column and include units (e.g., ) only in the headers. Occupy more than half the grid. Use a cross ( This question tests your ability to use universal
Candidates were provided with "urine" samples (A, B, C, and D) and tasked with determining their glucose concentration using the Benedict's Test Objective:
The 2020 O Level Biology Practical exams focused on core experimental skills, including nutrient testing, enzyme activity, and specimen observation. Below are the key questions and recommended answers based on the major 2020 paper variants. 1. Food Tests and Enzyme Activity
In 2020, students were instructed to observe a specimen, cut a cross-section, and produce a detailed biological drawing. Rules for an O-Level Biological Drawing
: Analyzing catalase activity by counting oxygen bubbles from hydrogen peroxide. Improvement If you are sitting a different exam board,
Never write a number down without its corresponding unit ( cm3c m cubed ∘Craised to the composed with power C
Spend the first few minutes understanding the layout of the experiments.
Add 2 cm³ of Sample X, followed by an equal volume of Biuret reagent (or sodium hydroxide followed by copper(II) sulfate dropwise). Shake well. Expected Observations & Interpretation: Solution remains blue: Proteins absent. Solution turns violet/purple: Proteins present. 3. Iodine Test for Starch