Notes 7.2 –
Aerobic and Anaerobic
Respiration
Cell Respiration Part 2
Page 131
Standards
CLE 3210.3.3 Investigate the relationship
between the processes of photosynthesis and
cellular respiration.
SPI 3210.3.3 Compare and contrast
photosynthesis and cellular respiration in terms
of energy transformation.
Identify the reactants and products of the Krebs
Cycle
Evaluate situations when a cell must use
anaerobic vs. aerobic respiration
Identify the reactants and products of the
Electron Transport Chain
Summarize the major events in aerobic and
anaerobic respiration
Find a Partner
With your Partner:
Review Glycolysis:
Reactants:
Glucose, 2 ATP and
NAD+
Products:
Pyruvate , H2O, 4 ATP,
and NADH
Location:
Cytosol
Review: What happens to Pyruvate?
Two possible paths:
Pyruvate
Aerobic
Respiration
Fermentation
(cytosol)
(mitochondria)
Few
Lots of
ATP
ATP
Overview of Aerobic Respiration
Two Main Parts:
Krebs Cycle (citric acid cycle) – uses pyruvate
Electron Transport Chain – uses NADH
Krebs Cycle – (citric acid cycle)
Reactants:
Pyruvate (pyruvic acid)
Products:
ATP – goes into cytosol
CO2 – is released
NADH2 – Goes to ETC
(electron transport
chain)
Electron Transport Chain (ETC)
Reactants:
NADH2 ; FADH2
oxygen
Products:
34 ATP molecules
2 molecules H2O
With your Partner
Which reaction provides the greatest net
gain of ATP?
Energy Gain
With your Partner
Even though plant cells
make some ATP during
photosynthesis why do
they need cell
respiration as well?
Fermentation (Anaerobic Respiration)
With your Partner
Brainstorm some
situations when a cell
could be devoid of
Oxygen
Fermentation (anaerobic)
Two types of fermentation:
Lactic Acid fermentation:
Performed by human muscle cells and some
microorganisms - used to make cheeses, yogurt,
sour cream.
Alcohol fermentation:
Performed by some microorganisms – used to
make ethyl alcohol.
ATP Yield = 2
With your Partner:
Determine what all of these have
in common.
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