→ The best 2021 answer sets explain denaturation clearly.
Visking tubing and agar lack the active transport and complex structure of real cells.
From scanning the 2021 examiner reports (based on real candidate performance), the top three answer errors were:
In the 2021 practical, candidates were given a stained cross-section of a leaf or onion cells. The carried 5–6 marks. Here is what examiners actually accepted.
