Draw a labelled diagram of a single, reproducing, yeast cell - Leaving Cert Biology - Question 7 - 2011
Question 7
Draw a labelled diagram of a single, reproducing, yeast cell.
Answer the following questions in relation to your investigation into the growth of leaf yeast.
(i) F... show full transcript
Worked Solution & Example Answer:Draw a labelled diagram of a single, reproducing, yeast cell - Leaving Cert Biology - Question 7 - 2011
Step 1
Draw a labelled diagram of a single, reproducing, yeast cell.
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Answer
To answer this part, the diagram should include the following labeled parts:
Nucleus
Bud
Cell wall
Cytoplasm
Make sure to use appropriate scientific conventions for your diagram.
Step 2
From what plant did you obtain the yeast?
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You could obtain the yeast from any valid plant such as Ash or Privet.
Step 3
Name the nutrient medium on which you grew the yeast.
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The nutrient medium used for growing the yeast is Agar.
Step 4
Outline the steps you followed to get the yeast cells onto the nutrient medium.
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Cut a leaf (or leaf section) from the plant.
Stick it to the lid of a Petri dish using tweezers.
Place the dish upside down, ensuring the agar is facing up.
Allow it to rest for approximately 24 hours.
Step 5
How long did it take for the yeast to become visible on the nutrient medium?
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It took 72 hours or approximately 3 days for the yeast to become visible.
Step 6
How did you recognise the yeast?
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The yeast was recognized by the formation of pink colonies or pink spots on the nutrient medium.
Step 7
Describe one aseptic technique you carried out during this investigation.
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One aseptic technique used was swabbing the bench with a disinfectant before starting the experiment to prevent contamination, as well as sterilizing instruments before usage.
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