O Level Biology Practical 2020 Answers High Quality Now

Upper epidermis, Palisade mesophyll, Spongy mesophyll, Xylem, Phloem, Stoma (lower surface).

In the 2020 practical, a common question asked students to investigate the effect of pH on the rate of digestion of egg albumen (protein) by pepsin. o level biology practical 2020 answers

The 2020 O Level Biology Practical (Paper 3) covered experiments involving beetroot pigment release food tests for glucose . You can access the full 2020 Mark Schemes for the October/November and May/June sessions through PapaCambridge Save My Exams Core Practical Themes & Answers Beetroot Pigment Experiment (5090/31 & 32): Observation You can access the full 2020 Mark Schemes

Unexpectedly for a practical, students were asked to analyze fruit fly data, including genetic diagrams and distinguishing between continuous and discontinuous variation. Commonly Reported Mistakes & Challenges : Reliability is improved by repeating the experiment

A central part of the exam involved investigating the breakdown of hydrogen peroxide by catalase. Students had to construct data tables, plot graphs, and explain why catalase is substrate-specific.

: Reliability is improved by repeating the experiment and calculating an average. Resources for O Level Biology Practical Preparation Past Papers & Mark Schemes Practical Manuals Alternative to Practical (Paper 6) Official CAIE Resources PastPapers.co