1. 9.3 Getting Energy to Make ATP
Cellular Respiration
Fermentation
Photosynthesis vs. Cellular Respiration

2. Cellular Respiration
Process by which mitochondria break down food to make ATP
3 Steps of Cellular Respiration
1. __________________
2. _______________ (Krebs Cycle)
3. ___________________________
1st stage: Anaerobic 2–3 stages: Aerobic

3. Glycolysis = No Oxygen
Series of chemical rxns in the cytoplasm that breaks down _____________, a 6 carbon compound, into 2 molecules of ________________, a 3 carbon compound.
2ATP used to start glycolysis and 4ATP produced = not efficient source of energy
What is the net ATP produced? #NADH? #Hydrogens?

4. Citric Acid Cycle = Oxygen
Pyruvic acid from the cytoplasm moves into the ______________.
Before it can begin the CAC, it must undergo some changes before it enters the _______________________.
Pyruvic acid gives off a molecule of ______ and combines with coenzyme A, to form ________________.
Acetyl-CoA produces NADH and H+ and this begins the ____________________________.

5. Citric Acid Cycle continued
1: Acetyl CoA reacts with 4C compound to form a Citric Acid (4 + 2 = __C)
2: CO2 produced, converting a 6C molecule to a ___C molecule.
(6-1 = __) During this time NADH and H+ is produced.
3: Another molecule of CO2 released, makes a 4C compound, 1 ATP, and 1 NADH
4: 4C compound goes through a series of reactions and produces FADH2, NADH, and H+
Carbon chain rearranged and starts all over again when set up with Acetyl – CoA
(NAD + and FAD are used as electron carriers for the ETC of the mitochondria)
For every turn of the cycle 1 ATP and 2 CO2 molecules produced

6. Electron Transport Chain
Inner membrane of the mitochondrion
1: _______and _______deliver energized electrons to the mitochondrial membrane
2: Electrons are passed from protein to protein, releasing _______along the way. Some of the energy is used directly to form ________ or H+ ions into mitochondria.
Inside becomes __________charged, so outside the membrane becomes ____________. This drives the energy for _________ production
3. Final electron acceptor = Oxygen. It reacts with 4 H+ and 4 electrons to form 2 ______ molecules.
Adds _______ ATP molecules to the 4 already produced.
Why is oxygen so important to the process?

7. Lactic Acid Fermentation
Follows glycolysis and provides a means of producing ATP until oxygen is readily available
Aerobic or anaerobic?_______________________
2 molecules of _______________ produced in glycolysis use NADH to form 2 molecules of _______________.
Releases NAD+ and 2 ATP for each _____________ molecule
Lactic acid is transferred from muscle cells, to the liver that converts it back to pyruvic acid. Lactic acid that builds up in muscle cells = muscle ______________.

8. Alcoholic Fermentation
Used by yeast cells and some bacteria to produce _______ and ______________.
Glucose Glycolysis (2 pyruvic acids)  carbon dioxide + alcohol + 2 ATP
Efficient?_________________________

9. Comparison of Photosynthesis and Cellular Respiration
Photosynthesis (Chloroplasts)
_________synthesized
Energy from sun stored in ___________________
____________ given off
Produces sugars from PGAL
Requires _____________
Occurs only in presence of ____________________
Cellular Respiration
(Mitochondria)
__________ broken down
Energy of _______ released
______________ taken in
Produces _____________ and _______________
Does not require ________
Occurs in all living _______

11. Homework/Classwork WS 9.3 9.3 Section Assessment Q1 and 5 pg 237
Photosynthesis/Cellular Respiration Flow Chart – Fill in with a partner