The diagram below represents stages in respiration in yeast cells - Leaving Cert Biology - Question c - 2015
Question c
The diagram below represents stages in respiration in yeast cells.
Glucose
Stage 1
Pyruvic acid
Anaerobic pathway
Compound A + Gas X
Gas X
Acetyl CoA
Hydroge... show full transcript
Worked Solution & Example Answer:The diagram below represents stages in respiration in yeast cells - Leaving Cert Biology - Question c - 2015
Step 1
Name Stage 1 and state its location in yeast cells.
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Answer
Stage 1 is Glycolysis, which occurs in the cytosol or cytoplasm of yeast cells.
Step 2
Copy the table below into your answer book and complete it by inserting a letter or name, from the diagram above, to identify a compound which has the number of carbon atoms shown.
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Answer
Number of carbon atoms
Compound
6
Glucose (or Compound C)
3
Pyruvic acid
2
Acetyl CoA (or Compound A)
Step 3
Name Gas X and Gas Y.
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Answer
Gas X is Carbon dioxide (CO₂) and Gas Y is Oxygen (O₂).
Step 4
Name the compound D and give two functions of this compound in yeast cells.
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Answer
Compound D is Water (H₂O). Two functions of this compound in yeast cells are: 1) It acts as a solvent and biochemical reactant, and 2) It helps maintain constant temperature and provides a medium for chemical reactions.
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