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Question 20N.3.SL.TZ0.a

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.3.SL.TZ0.a
Level SL Paper 3 Time zone TZ0
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 1]
20N.3.SL.TZ0.a

The diagram shows an aerated fermenter commonly used in biotechnology.

[Source: Adapted from GYassineMrabetTalk, CC BY-SA 3.0
https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons.]

Outline a reason for inserting steam into the fermenter before fermentation.

[1]

Markscheme

sterilizes/kills unwanted microorganisms in the fermenter;

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