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 ... 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 fungus that I studied during my course 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, while yeast, such as Saccharomyces cerevisiae, 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 substance that supplies essential nutrients, such as carbohydrates, proteins, and minerals, to support the growth of microorganisms or cells.
Step 4
Name the nutrient medium that you used.
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The nutrient medium I used was 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, including bacteria and fungi, to prevent contamination during the experiment.
Step 6
Describe, in words and/or labelled diagram(s), how you conducted the investigation.
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To conduct the investigation, I performed the following steps:
Cutting Leaves: I cut fresh leaves into small pieces.
Attaching to Lid: These pieces were attached to the lid of a sterile Petri dish using tape.
Sealing the Dish: I sealed the Petri dish tightly to prevent contamination.
Inverting the Dish: The dish was inverted to create a suitable environment for the yeast to grow.
Incubation: The dish was incubated at room temperature for a specified period, monitored for growth.
Step 7
What was the result of your investigation?
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The result of my investigation was the growth of pink colonies on the malt agar, indicating successful yeast growth. If the colonies did not develop, it would suggest poor conditions for growth or contamination.
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