8. (a) (i) Name a fungus, other than yeast, that you studied during your course - Leaving Cert Biology - Question 8 - 2007
Question 8
8.
(a) (i) Name a fungus, other than yeast, that you studied during your course.
(ii) Give one way in which the fungus that you have named in (i) differs from yeas... show full transcript
Worked Solution & Example Answer:8. (a) (i) Name a fungus, other than yeast, that you studied during your course - Leaving Cert Biology - Question 8 - 2007
Step 1
Name a fungus, other than yeast, that you studied during your course.
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Answer
One example of a fungus that I studied is Rhizopus.
Step 2
Give one way in which the fungus that you have named in (i) differs from yeast.
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Answer
Rhizopus is multicellular, whereas yeast is unicellular.
Step 3
It was necessary to use a nutrient medium. What is a nutrient medium?
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A nutrient medium is a material that supplies food and necessary conditions for the growth of microorganisms. It provides the essential nutrients required for cellular processes and sustenance.
Step 4
Name the nutrient medium that you used.
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The nutrient medium I used is malt agar.
Step 5
The nutrient medium should be sterile. Explain the underlined term.
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The term 'sterile' means that the nutrient medium must be free of any microorganisms. This is important to ensure that the growth observed is solely from the yeast being tested and not from external contaminants.
Step 6
Describe, in words and/or labelled diagram(s), how you conducted the investigation.
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The investigation involved cutting leaves of the plant and attaching them to lids of petri dishes. The dishes were inverted and sealed to prevent contamination. The setup was then incubated under suitable conditions to encourage the growth of leaf yeast, while ensuring aseptic techniques were adhered to throughout the process.
Step 7
What was the result of your investigation?
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The result of my investigation was the appearance of pink colonies on the agar. This indicated the successful growth of the leaf yeast. In cases where there was no growth, a negative result was also noted.
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