Production of ethanol by fermentation (anaerobic respiration) (LC 2026) (Leaving Cert Biology): Flashcards
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What are the two types of respiration?
What are the two types of respiration?
Aerobic and anaerobic respiration.
What does anaerobic respiration produce in yeast?
What does anaerobic respiration produce in yeast?
Ethanol and carbon dioxide are produced.
What is the equation for ethanol production?
What is the equation for ethanol production?
C₆H₁₂O₆ + Yeast → C₂H₅OH + CO₂
What is fermentation in anaerobic respiration?
What is fermentation in anaerobic respiration?
It produces energy and ethanol without oxygen.
What is produced by animals under anaerobic conditions?
What is produced by animals under anaerobic conditions?
Lactic acid is produced by animals.
Why is glucose used in fermentation experiments?
Why is glucose used in fermentation experiments?
It's the substrate for anaerobic respiration.
How do you confirm CO₂ production in an experiment?
How do you confirm CO₂ production in an experiment?
Limewater turns milky when CO₂ is present.
What is the optimal temperature for yeast enzymes?
What is the optimal temperature for yeast enzymes?
30°C is optimal for yeast enzyme activity.
What test is used to detect ethanol presence?
What test is used to detect ethanol presence?
The iodoform test indicates ethanol by a yellow precipitate.
What should be done to prevent contamination?
What should be done to prevent contamination?
Sterilise all apparatus before the experiment.