Aerobic and Anaerobic Respiration Flashcards
What is aerobic respiration?
Aerobic respiration is respiration using oxygen. It’s the most efficient way to transfer energy from glucose. It goes on all the time in plants and animals.
Where does most of the reactions in aerotic respiration happens?
It happens inside mitochondria.
What is the symbol equation for aerobic respiration? (Inverse of the photosynthesis equation)
Glucose + oxygen → carbon dioxide + water.
OR
C₆H₂O₆ + 6O₂ → 6CO₂ + 6H₂O.
What does anaerobic means?
Anaerobic means “without oxygen”. It’s the incomplete breakdown of glucose, making lactic acids.
When do we start using anaerobic respiration?
When we do vigorous exercise and our body can’t supply enough oxygen to our muscles, they start doing anaerobic respiration as well as aerobic respiration.
What is the word equation for anaerobic respiration?
Glucose → lactic acid.
Why does anaerobic respiration does not transfer nearly as much energy as aerobic respiration?
This is because glucose is not fully oxidised (because it does not combine with oxygen). So, anaerobic respiration is only useful in emergencies, e.g. during exercises when it allows us to keep on using our muscles for a while longer.
Plants and yeast cells can respire without oxygen too, but what do they produce?
They produce ethanl (alcohol) and carbon dioxide instead of lactic acid.
What is the word equation for anaerobic respiration?
Glucose → ethanol + carbon dioxide.
What is anaerobic respiration in yeast cells called? What is it used for?
It is called fermentation. In the food and drinks industry, fermentation by yeast is of great value because it’s used to make bread and alcohol drinks.
How does the bread rise?
In bread-making, it’s the carbon dioxide from fermentation that makes the bread rise.
What produces alcohol?
In beer and wine-making, it is the fermentation process that produces alcohol.
