O Level Biology Practical 2020 Answers High Quality -

Ensure the relative sizes of structures (e.g., the cortex vs. the vascular bundle) match the actual specimen.

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remained blue or took the longest (over 120 seconds), indicating it was the "healthy" sample with no glucose. ) showed intermediate results. 2. Biological Drawing & Microscopy o level biology practical 2020 answers

Based on examiner feedback, here are the that lost marks: Ensure the relative sizes of structures (e

Water moved into potato cells by osmosis down a water potential gradient, making cells turgid (increase in length/mass). and starch using standard reagents.

A major component of the 2020 paper involved identifying unknown nutrients in a given solution (Sample X) and investigating the effects of temperature or pH on enzyme-catalyzed reactions. 1. Benedict's Test for Reducing Sugars

: Identifying reducing sugars, proteins, fats, and starch using standard reagents.