BIOL - Aerobic and Anaerobic Respiration
Biology, aerobic respiration, anerobic respiration - IGCSE | IBDP | DSE | GCE | IAL | AP Biology
All living organisms need energy to perform cell activities and maintain organization.
ATP is the molecule that provides energy to cells, and ATP is released during respiration.
Respiration is a chemical reaction where food molecules are broken down to release energy.
There are two types of respiration: aerobic respiration and anaerobic respiration.
Aerobic respiration happens when there is oxygen.
In the presence of oxygen, aerobic respiration will release a large amount of energy because glucose is completely broken down:
glucose + oxygen → carbon dioxide + water
C6H12O6 + 6O2 → 6CO2 + 6H2O
Aerobic respiration takes place in mitochondria of cells.
Anaerobic respiration does not require oxygen and releases a relatively small amount of energy because glucose is broken down incompletely.
glucose → lactic acid
During vigorous exercise, not enough oxygen can be provided for aerobic respiration, so energy will be provided through anaerobic respiration. As a result of anaerobic respiration, lactic acid will build up in muscles.
In plants and yeasts:
glucose → carbon dioxide + ethanol
Anaerobic respiration is called fermentation in plants and yeasts and is used for brewing alcohol drinks and bread making.
👆 For IGCSE Biology, it is important to know the word and chemical equation for aerobic and anaerobic respiration 👆
Experiment to Determine the Production of Carbon Dioxide from Respiration
There are two ways to experimentally determine the production of carbon dioxide from respiration:
1. Using hydrogencarbonate indicator
Hydrogencarbonate indicator shows the presence carbon dioxide:
2. Using limewater
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