Transcript Cellular Respiration

Cellular Respiration
http://www.biology.clc.uc.edu/courses/bio104/atp.htm
Vocabulary
• Anaerobic- without oxygen
• Aerobic- with oxygen
Cellular Respiration
• The process by which living
things release the energy
(ATP) stored in organic
molecules
Equation
• C6H12O6 + 6O2 -----> 6CO2 +
6H20 + energy (heat and ATP)
Cell Respiration
Glycolysis
aka: Step 1
• A series of 10 reactions
• The process breaks down
glucose into 2 pyruvate
molecules and 2 ATP
• Occurs in cytosol/cytoplasm
Glycolylsis
• Glucose (6 carbon sugar) is
broken down into 2 Pyruvate
acids (3 carbon sugars)
Glycolysis
Fermentation
aka: Step 1.5
• The process by which
pyruvate is converted in the
absence of oxygen into
either alcohol or lactic acid
Alcohol Fermentation
Lactic Acid
Fermentation
Fermentation
Plant Vs. Animal
• Alcohol
Fermentation
• Creates CO2
• EX= Root
beer and
ethanol
• Lactic Acid
Fermentation
• No CO2
• EX= Muscle
Aches and
cheese
Availability of Oxygen
AKA: Aerobic Respiration
• If no oxygen is available- the
process stops.
• If oxygen becomes available,
the process moves onto
oxidative reduction & the kreb’s
cycle.
• Possible for 36 ATP to be
made.
Oxidative Reaction
• The process by which
pyruvate is broken down in
the presence of oxygen into
a two-carbon molecule (acytl
COA) which enters the Krebs
cycle.
Oxidative Reduction
Continued
• Carbs are broken down into
water and CO2.
• Removal of H+ = Oxidation
• Addition of H+= Reduction
• OIL RIG
Krebs cycle
aka: Step 2
• H+ is added to NAD+
• NADH is produced to supply
the electron transport system
• Occurs in mitochondrial
matrix
Krebs cycle cont.
• The two-carbon fragment
joins with a four-carbon
sugar. Eight additional
reactions occur releasing
carbon dioxide and 2 ATP
Krebs cycle
• The NADH transports hydrogen
atoms and electrons to the
electron transport chain
• ATP is generated and the
hydrogen joins oxygen
• 2 H+ + O H2O(water)
Simple Krebs Cycle
Products of Krebs Cycle
• 1 glucose= 2 turns on the
cycle
• Plus- 6NADH, 2FADH, 2ATP
and acetyl co A.
Electron Transport
Chain
Electron Transport Chain
aka: Step 3
• NADH2 releases H+ and eare transferred to eacceptors.
• E- get passed along in redox
reactions. (hot potato)
• Most (34) ATP is made here
E.T.C. cont.
• When e- run out of energy,
oxygen binds with H+ to form
water.
E.T.C. Drawing
ATP
• In the presence of oxygen,
up to 36 additional ATP are
produced
ATP Yield
• Glycolysis=
2 ATP
• Kreb Cycle =
2 ATP
• E.T.C. =
34 ATP
• ____________________
• Total Possible = 38 ATP
http://www.biology.clc.uc.edu/courses/bio104/atp.htm
• Add animation
http://www.phschool.com/science/biology_place/labbench/lab5/c
ellular.html
• Recipes- http://biology.clc.uc.edu/Courses/bio104/cellresp.htm
• animation
http://www.life.uiuc.edu/plantbio/cell/images/ATPSynthesis.gif