(i) Fermentation is a process that does not use ......... - Leaving Cert Biology - Question 9 - 2022
Question 9
(i) Fermentation is a process that does not use ..........
(ii) Name the gas produced during alcohol fermentation.
(b) (i) Draw a labelled diagram in the space... show full transcript
Worked Solution & Example Answer:(i) Fermentation is a process that does not use ......... - Leaving Cert Biology - Question 9 - 2022
Step 1
Fermentation is a process that does not use ..........
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Answer
Oxygen
Step 2
Name the gas produced during alcohol fermentation.
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Answer
Carbon dioxide
Step 3
Draw a labelled diagram in the space below of the apparatus that you used to prepare alcohol in the laboratory.
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Answer
The diagram should include a fermentation vessel (e.g., a container). A water bath can be depicted where the fermentation occurs, along with a stopper and an outlet for gases. Ensure correct labels are included for every component.
Step 4
Describe one safety precaution you took during the activity.
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Answer
Wore a lab coat to protect against spills or accidents.
Step 5
Give a suitable temperature for this activity.
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17°C to 32°C
Step 6
How did you know alcohol production had stopped?
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There were no more bubbles being produced in the fermentation apparatus.
Step 7
Briefly describe how you set up the control for this activity.
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Set up a control with no yeast (or sugar) in a similar environment to compare results.
Step 8
Name the test, or the chemicals you used, to show that alcohol was present.
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Answer
Lodoforn (or sodium hypochlorite and potassium iodide)
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