(a)
(i) Name the fungus, other than yeast, that you have studied as part of your course - Leaving Cert Biology - Question 9 - 2018
Question 9
(a)
(i) Name the fungus, other than yeast, that you have studied as part of your course.
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(ii) Give one way t... show full transcript
Worked Solution & Example Answer:(a)
(i) Name the fungus, other than yeast, that you have studied as part of your course - Leaving Cert Biology - Question 9 - 2018
Step 1
Name the fungus, other than yeast, that you have studied as part of your course.
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Answer
Rhizopus
Step 2
Give one way the fungus you have named in part (i) differs from yeast.
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Answer
Rhizopus is multicellular or has hyphae (or mycelium or rhizoids) and produces zygospores.
Step 3
Mention two aseptic techniques you carried out to ensure a pathogen-free environment.
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Minimal opening of containers and washing the bench with disinfectant/flamming instruments.
Washing hands or wearing gloves to avoid contamination.
Step 4
What type of agar is recommended for optimal growth of yeast and other fungi?
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Answer
Malt agar, which allows for nutrient availability.
Step 5
Describe how the plates were stored, from introduction of the yeast source until yeast growth was visible on the agar.
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The plates were stored right-side up for the first 24 to 48 hours, then placed upside down in an incubator at temperatures between 15 °C and 30 °C for 2 to 7 days.
Step 6
How did you identify the leaf yeast growing on the agar?
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The leaf yeast was identified by the pink colonies formed on the agar.
Step 7
Suggest a reason why few or no leaf yeasts may have grown on the agar.
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Possible reasons include air pollution, time of year, recent rainfall, unsuitable temperature, or damage to the leaves during handling.
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