Download Aerobic Cellular Respiration class notes.notebook

Aerobic Cellular Respiration class notes.notebook
Intro to
Cellular Respiration
Jan 16­12:16 PM
Remember Photosynthesis?
6CO2 + 6H2O C6H12O6 + 6O2
What happens to the glucose?
In the plant:
used to build cell walls
used to make ATP (energy)
this is called Respiration...
C6H12O6 + 6O2 6H2O + 6CO2 + ATP
Who else does this?
Feb 3­6:04 PM
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Aerobic Cellular Respiration class notes.notebook
We (animals) do! We need glucose to make ATP (energy), also.
When animals eat, their food is broken down into monomer form. One of these monomers is glucose.
C6H12O6 + 6O2 6H2O + 6CO2 + ATP
During Cellular Respiration if oxygen is present aerobic respiration will occur.
Location: mitochondria of a cell.
O
O
Examples of organisms that do aerobic respiration are animals and plants.
If oxygen is NOT present then anaerobic respiration will occur.
Location: cytoplasm of a cell.
Jan 16­3:22 PM
O
O
Aerobic
Cellular Respiration
Jan 16­12:16 PM
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Aerobic Cellular Respiration class notes.notebook
Let's take a closer look at a mitochondrion to see what is involved with Aerobic Cellular Respiration....
1) Matrix:
the inner space of
the mitochondria. Also home to the first rxn in Aerobic Respiration.
2) Cristae:
1.
2.
3.
4.
the folds of the inner membrane.
3) Inner membrane:
home to the last reaction in Aerobic Respiration.
4) Outer membrane
PS: Which types of cells have mitochondria? Plants and animals!!!
Jan 16­3:33 PM
Aerobic Cellular Respiration involves....
Electron Transport
Glycolysis
Three Steps:
1) Glycolysis is an anaerobic step so it takes place in the cytoplasm of
the cell.
2) The Kreb Cycle is the 1st aerobic step and it takes place in
the matrix of the mitochondria.
3) The Electron Transport Chain is the 2nd aerobic step and it takes place
in the inner membrane of the mitochondria.
Jan 16­3:47 PM
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Aerobic Cellular Respiration class notes.notebook
1) Glycolysis
Oxygen
Jan 16­3:38 PM
Glycolysis ­ is the first step in cellular respiration and does
not require oxygen to break glucose apart.
This step takes place in the cytoplasm, outside the mitochondria.
Glucose (C6H12O6) is broken down into (2) Pyruvic Acid molecules (3­Carbon each).
The H+ from the glucose is released and picked up by an electron carrier called NAD+ (NADH)
Some of the oxygen from glucose will make its way to the mitochondria.
(4) ATP are created when glucose is broken down.
However, (2) ATP are used to break down glucose, so (2) ADP +Pi are created.
So... only (2) ATP are left when Glycolysis is finished.
Jan 16­4:25 PM
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Aerobic Cellular Respiration class notes.notebook
2) The Kreb Cycle
Oxygen
CO2
Jan 16­4:22 PM
The Kreb Cycle ­ is the first step in aerobic respiration. If oxygen is present after glycolysis,
then some of the products of glycolysis will enter the mitochondria and begin
aerobic respiration.
Oxygen and the Pyruvic Acid molecules pass into the matrix of the mitochondria.
Pyruvic Acid is broken apart by an enzyme, then the carbons are combined with the oxygen to form carbon dioxide. CO2 is a waste product for animal cells so it is released from the cell. Plants, however, can use the CO2 for photosynthesis.
(1) ATP is created from each of the (2) Pyruvic Acid molecules.
The Kreb Cycle creates a total of (2) ATP when it is completed.
Jan 16­4:47 PM
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Aerobic Cellular Respiration class notes.notebook
3) Electron Transport Chain
Oxygen
Electron Transport
Chain
ADP + P
H 2O
Jan 16­4:23 PM
Electron Transport Chain ­ the second step in aerobic respiration
and the last step overall. This step
creates the most ATP!
This last step occurs in the inner membrane of the mitochondria and uses the H+ from glycolysis and oxygen left over from the Kreb Cycle.
The H+, that was carried over on NADH, will combine with oxygen to form H2O.
As water is being created, energy is being released and building up in the membrane.
This energy will create ATP from ADP + Pi, which is found in the cell.
This last step will end up producing (34) molecules of ATP from the one glucose molecule!
http://vcell.ndsu.nodak.edu/animations/etc/movie­flash.htm
Jan 16­4:56 PM
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Aerobic Cellular Respiration class notes.notebook
Let's Review.....
oxygen
Total Amount of ATP Created during Aerobic Respiration was 38 ATP
Jan 16­4:57 PM
6 O2 + C6H12O6 6 CO2 + 6 H2O + Energy 1) Glycolysis
Reactants:
C6H12O6
2 ATP
Products:
2) The Kreb Cycle
Reactants:
Oxygen
2 Pyruvic Acid
NADH
Products:
NADH
oxygen
Found:
Reactants:
oxygen
2 Pyruvic Acid
2 ATP
3) Electron Transport Chain
Products:
CO2
H2O
2 ATP
34 ATP
Found:
Found:
Matrix Inner Membrane
Cytoplasm
Jan 16­4:57 PM
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Aerobic Cellular Respiration class notes.notebook
Respiration Roadmap
2a. Krebs Cycle
2b. Electron Transport
Chain
Feb 3­9:06 PM
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Attachments
aerobic_stages_v2.html