Respiration in Single-Celled Organisms (AQA A-Level Biology): Flashcards
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Practise the cards
10 cards from this deck
Type of organism used in respiration practical
Type of organism used in respiration practical
Single-celled organism (yeast)
Role of methylene blue in respiration practical
Role of methylene blue in respiration practical
Electron acceptor (redox indicator)
Methylene blue colour change during respiration
Methylene blue colour change during respiration
Blue to colourless
Independent variable (yeast respiration)
Independent variable (yeast respiration)
Temperature
Dependent variable (yeast respiration)
Dependent variable (yeast respiration)
Time for methylene blue to become colourless
Formula: rate of respiration
Formula: rate of respiration
Why buffer the yeast-glucose solution?
Why buffer the yeast-glucose solution?
Maintain constant pH (prevents confounding enzyme effects)
Equilibration time in water bath
Equilibration time in water bath
10 minutes
Yeast respiration at optimum temperature
Yeast respiration at optimum temperature
Highest rate of respiration
Effect of very high temperature on enzymes
Effect of very high temperature on enzymes
Denaturation (reduces/stops respiration)