Answer BOTH parts of this question (use
diagrams if necessary)

1) DESCRIBE and DEFINE how the (i) effective, (ii) toxic
and (iii) lethal doses for a compound can be determined. [15
marks]

2) Why is calculation of LD₅₀ not very useful
for the determination of compound toxicity? [5 marks]

Please answer the question completely and concisely.

Please answer it by typing and not
handwriting. However, It’s fine to draw any diagrams
by hand and then scanning that it.

P.S: This is a past exam paper question.