2024HSCShort answer

Q22 (a)

2 marks

Question

A student designed and conducted a practical investigation to test for the presence of microbes in water and food samples.
Justify a safety precaution required to prevent infection when conducting the investigation.

Try the question before revealing the answer.

Solution

Criteria	Marks
Justifies a safety precaution used to prevent infection	2
Provides some relevant information	1

Sample answer:

The wearing of gloves to prevent contact with skin and the subsequent entry of pathogens into skin/mouth

Answers could include:

Keeping the petri dish closed and wiping down the benchtop with an antiseptic after viewing the microbes – this will kill any pathogens that may have escaped the petri dish and could be transferred to the student.

Supplied marking guidance · human reviewed

Compare this with your working, not only your final sentence.

Syllabus alignment

Module 7 · Infectious Disease

Causes of Infectious DiseaseDesign and conduct microbial testing of water or food samples.

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