DP Chemistry (last assessment 2024)

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Question 19N.3.hl.TZ0.25b

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.hl.TZ0.25b
Level hl Paper 3 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 1]
19N.3.hl.TZ0.25b

The discovery of penicillins contributed to the development of antibiotics.

(b)

Outline the impact of antibiotic waste on the environment.

[1]

Markscheme

«leads to bacterial» resistance «to antibiotics»
OR
destroys useful/beneficial bacteria
OR
useful/beneficial/less harmful bacteria replaced with «more» harmful bacteria ✔

NOTE: Accept “affects/disturbs micro-ecosystems”.

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