Download CELLULAR RESPIRATION

CELLULAR
RESPIRATION
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Includes metabolic pathways
Begins with glucose and ends
with carbon dioxide & water
Overall equation (aerobic)
Glucose-high energy molecule
Electrons are removed from
substrates & received by
oxygen (oxidation)
OVERALL DESCRIPTION
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Glucose is oxidized and oxygen
is released
Glucose is released slowly and
ATP is produced gradually
Breakdown of glucose yields 38
ATP
Each reaction is catalyzed by
its own enzyme
COMPONENTS OF
OVERALL PROCESS
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Glycolysis
Transition Reaction
Kreb’s Cycle
Electron Transport
GLYCOLYSIS
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Begins with the two
phosphorylations using 2 ATP
Sugar cleavage occurs
Oxidations (dehydrogenations)
occur
2 ATP form. Aerobic or
anaerobic respiration may
follow
GLYCOLYSIS
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Definition
1. Gain of 2 ATP
2. Occurs in the cytoplasm
3. Does not require oxygen
AEROBIC RESPIRATION
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The Transition Reaction
The Kreb’s Cycle
The Electron Transport System
Pyruvic Acid broken down into
carbon dioxide and water
Takes place in the mitochondria
THE TRANSITION
REACTION
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Pyruvic acid is oxidized to
Acetyl Co A and carbon dioxide
is removed
THE KREB’S CYCLE
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1. Number of 0xidations
(dehydrogenations) occur
2. Carbon dioxide is produced
3. 2 immediate ATP are
produced per molecule of
glucose.
The cycle turns twice for each
glucose molecule.
THE ELECTRON
TRANSPORT SYSTEM
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1. Series of carriers accepts
electrons . Electrons are
passed from carrier to carrier
until received by oxygen.
Electrons pass from higher to
lower energy state
Once formed ATP diffuses out of
the mitochondria.
ANAEROBIC
RESPIRATION OR
FERMENTATION
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Pyruvic acid is a pivotal
metabolite in cellular
respiration
If oxygen is not available to the
cell, fermentation, an anaerobic
process occurs
Lactic acid or ethyl alcohol and
carbon dioxide is formed &2ATP
ENERGY YIELD FROM
GLUCOSE METABOLISM
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AEROBIC
1. From Kreb’s Cycle
2. From Electron Transport
3. From Glycolysis
ANAEROBIC
1. From Glycolysis
COMPARE END PRODUCTS FOR
BOTH PROCESSES
CRITICAL THINKING
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Cyanide interrupts the
cytochrome system of electron
transport.
Why is cyanide a universal
poison effective in all
organisims with mitochondria?
CRITICAL THINKING
The electron transport
system is the producer of
ATP from ADP in aerobic
respiration. Stopping the
electron transport system
stops ATP production. Which
stops metabolic reactions.
 This is a universal system.
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