O Level Biology Practical 2020 Answers May 2026

The 2020 practical often featured a microscopy slide, though in some variants, photomicrographs were provided due to social distancing protocols.

While this article reconstructs the expected answers, you should verify with official sources:

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Expected Answer:

Common 2020 Mistake: Adding CuSO₄ before NaOH. That gives a false negative because copper ions will not complex with the peptide bonds correctly. The 2020 practical often featured a microscopy slide,

Accepted labels in 2020 mark scheme:

Most O Level Biology practical exams in 2020 tested these three core areas: While this article reconstructs the expected answers ,

Let’s go through each one with the exact answers that would get full credit.

Model Answer:

In the 2020 series, many students received a set of unknown solutions (A, B, C, D) and had to identify reducing sugars, starch, protein, and fat.

This is often the most distinguishing section of the paper.