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Paper 1
Bioenergetics
Respiration
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Biology > Paper 1 > Bioenergetics > Respiration
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Respiration
A process that supplies the
energy
needed for
biological
processes
Respiration is an exothermic reaction because it releases energy and it takes place
continually
in all living cells
Types of respiration
Aerobic
respiration
Anaerobic
respiration
Aerobic respiration
1.
Glucose
reacted with
oxygen
gas
2. Produces
carbon dioxide
and
water
3. Releases
energy
Aerobic
respiration
Glucose
molecule has been fully
oxidized
Glucose
Oxygen
Carbon dioxide
Water
Anaerobic respiration in muscles
1.
Glucose
converted to
lactic acid
2. Does not require
oxygen
Anaerobic
respiration releases much
less
energy than aerobic respiration
Anaerobic respiration in plants and yeast
1.
Glucose
converted to
ethanol
and carbon dioxide
2. Does not require
oxygen
Fermentation
Anaerobic respiration in
yeast
cells used to make alcoholic drinks and
bread
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