what is it?. respiration what are two types of fermentation? alcoholic fermentation lactic acid...
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Alcoholic FermentationPyruvic acid + NADH --> alcohol + CO2 +NAD+
What process produces the NADH?
Is this process aerobic or anaerobic?
Lactic Acid FermentationPyruvic acid + NADH --> lactic acid + NAD+
Where do the pyruvates come from?
Does this fermentation produce CO2?
Where is the NAD+ going to be reused?
• Lactic acid is produced in your muscles during rapid exercise when the body cannot supply enough oxygen.
• You produce lactic acid during short intense work like sprinting because you can not supply oxygen fast enough to the muscle cells.
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Aerobic respirationWhat is the correct sequence of events in this process?Glycolysis --> Krebs cycle --> Electron transport chain
C6H12O6 + 6O2 --> 6CO2 + 6H20 + ENERGY
What are the reactants in cellular respiration?food (glucose) and oxygen
Some of the energy released is captured as ATP and some is lost as heat.
How many ATP’s are recovered from one glucose molecule?
36What are the products of respiration?
carbon dioxide and water and energy
Glycolysis
1) Where does it occur?
cytoplasm
2) What is the starting molecule?
glucose
3) What is needed to get the process started?
an energy input = 2 ATP’s
Glycolysis
• What happens if oxygen is not present during glycolysis?
the pyruvates will be consumed by fermentation
Electron carriers?
• NADH
• FADH2
• During what processes are these compounds produced?
NADH - during glycolysis and Krebs cycle
FADH2 - during Krebs cycle
Aerobic vs Anaerobic
What does aerobic mean?
process that requires oxygen
Does glycolysis require oxygen?
no
Does the Krebs cycle require oxygen?
yes
Krebs Cycle
• What product from gylcolysis begins the Krebs cycle?
Pyruvic acid
• Where does this cycle take place in the cell?
mitochondria
Krebs cycle
• What does the Krebs cycle produce?
NADH, FADH2, CO2, and some ATP
• Which of these products are important to the electron transport chain?
NADH, FADH2, these are the electron carriers that allow for the production of much more ATP
Electron Transport Chain
• How do the electrons get transported to the special proteins involved?
carried by carrier molecules NADH, FADH2
• What is the primary function of the chain?
to make ATP
Electron Transport Chain
• Oxygen and water --- how is oxygen used in cellular respiration?
The oxygen atoms are the final electron acceptors and then they can attach with two H+ ions to form water at the end of the transport chain
Which process does not release energy from glucose?Glycolysis
Fermentation
Photosynthesis
cellular respiration
How are cellular respiration and photosynthesis almost
opposite processes?• Oxygen
photosynthesis produces it
respiration uses it to break down food
• Carbon dioxide
respiration produces it
photosynthesis uses it to make glucose