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cellular respiration
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Subdecks (2)
DNA replication and mitosis
cellular respiration
32 cards
photosynthesis
cellular respiration
16 cards
Cards (61)
Mitochondria
The site of
aerobic
respiration
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Cellular respiration
Glucose
(C6H12O6) is broken down to H2O and CO2, and produces LOTS of
ATP
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Mitochondria
Contain the
outer
membrane which regulates
molecules entering
and exiting
Contain the inner membrane which is
folded
into cristae to increase
surface area
for respiration reactions
Contain the matrix which is the
jelly-like
filling with many enzymes and is the site of the
Krebs
cycle
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Role of mitochondria
To produce
ATP
, which is used by cells for energy in active transport,
protein synthesis
, and movement
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Cells with
high energy demand
(e.g. muscle, secretory, sperm) have more
mitochondria
with more folded cristae to allow more reactions and ATP production
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Aerobic
respiration
Glucose
+ Oxygen → Carbon dioxide + Water (+ ATP +
Heat
)
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Aerobic respiration
Requires
oxygen
to break down
glucose
Starts in
cytoplasm
but mainly occurs in
mitochondria
Has three stages: Glycolysis,
Krebs
Cycle,
Electron transport chain
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Glycolysis
Occurs in cytoplasm, breaks down
glucose
to pyruvate, produces
2 ATP
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Krebs cycle
Occurs in
mitochondrial
matrix, breaks down
pyruvate
to produce CO2 waste and hydrogen atoms
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Electron transport chain
Occurs on
cristae
, hydrogen atoms ionised to H+ and their electrons passed between molecules to generate
36
ATP
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Anaerobic
respiration
Takes place in cytoplasm, does not require
oxygen
, only produces 2 ATP per
glucose
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Respiration is an
enzyme-mediated
process
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Factors affecting respiration rate
Temperature
pH
Concentration
of substrates (glucose, oxygen)
Inhibitors
Demand
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See all 61 cards
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