Post on 18-Jan-2016
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Cellular Respiration
Process of transferring energy in organic compounds to ATP
Equation = OPPOSITE OF PHOTOSYNTHESIS!!!
What was the equation for photosynthesis???
*Cellular respiration without oxygen (anaerobic) is less efficient than cellular
respiration with oxygen (aerobic)…
Anaerobic Respiration => 2 net ATPsAerobic Respiration => 36 net ATPs
Cellular Respiration is much like the “opposite” of photosynthesis.
C6H12O6 + 6O2 6CO2 + 6H2O + ATP
Formula for Cellular Respiration
(energy for the cell touse for other processes)
What will the cell use the ATP for?
Name some specific process of the cell.
Takes place in and around the mitochondrion.
What is the organelle of cellular respiration????
• Some of the steps in cellular respiration take place on the inner membrane of the mitochondrion, which is folded.
• What purpose do these folds serve?
Aerobic and Anaerobic C.R. begin with glycolysis…
**In the cytoplasm
**Anaerobic = NO OXYGEN needed
**Glucose is broken down to release energy – makes 2ATP
**Products used in Kreb’s Cycle and ETC
Glycolysis – Step One
Glucose
To the electron transport chain
2 Pyruvic acid
Let’s take a look at how plants and other cells use the
glucose that is produced.
Energy is packaged in glucose during the process of photosynthesis. However, the glucose molecule is bound together. Do you think cells can use this glucose in its current form?
NoSo what has to happen to the glucose, if it is bound together, in order for cells to use it?
The bond has to be broken and a more useable form of energy should be produced.
GLUCOSE( C6H12O6 )
OSE12O6 )
GLUC
( C6H
OSE12O6 )
GLUC ( C6H
OSE12O6 )
GLUC
( C6H
ENERGYATP
(Adenosine Triphosphate)
The presence or absence of oxygendetermines whether fermentation
(anaerobic respiration)or aerobic respiration will occur next…
No oxygen…
• Glycolysis still occurs
• Pyruvic acid (broken down glucose) is changed through fermentation
In Fermentation:
• No extra ATP is made
Two kinds:1. Lactic Acid Fermentation – causes
muscle fatigue 2. Alcoholic Fermentation –
makes beer, bread and wine
Anaerobic Respiration
1ST step – ________________*Takes place in ____________*Breaks down ___________*Makes ____ ATP
2ND step – ____________________
2 Types:
1. ______________2. ______________
Glycolysis
Glucose
Cytoplasm
Pyruvic acid
Electrons carried in NADH
Krebs Cycle
Electrons carried in NADH and
FADH2
Electron Transport Chain
Mitochondrion
Mitochondrion
If oxygen is present...
aerobic respiration can occur
Glucose
Glycolysis Krebs cycle
Electrontransport
Fermentation (without oxygen)
Alcohol or lactic acid
Chemical Pathways
Glucose(C6H1206)
+Oxygen
(02)
GlycolysisKrebsCycle
ElectronTransport
Chain
Carbon Dioxide
(CO2)+
Water(H2O)
Cellular Respiration
***Occurs in the mitochondrial matrix
* Makes carbon dioxide & 2 ATP
* Makes NADH, FADH2 (electron carriers) ETC!!
Citric Acid Production
Citric Acid Cycle (Krebs Cycle)–Step 2
Electron Transport Chain – Step 3
Occurs on proteins on inner membrane!
Electron carrier molecules (FADH2 & NADH) from Kreb’s Cycle
bring high energy e- formed in previous steps
Electron TransportHydrogen Ion Movement
ATP Production
ATP synthase
Channel
Inner Membrane
Matrix
Intermembrane Space
Mitochondrion
The electron carriers make 32 TOTAL!!!
Oxygen accepts e- which also combine with H+ to form water
Final Electron Acceptor = OXYGEN!Electron Transport
Hydrogen Ion Movement
ATP Production
ATP synthase
Channel
Inner Membrane
Matrix
Intermembrane Space
Mitochondrion
Aerobic Respiration
1st step – glycolysis*Makes ___ ATP*Takes place in __________
2nd step – Citric acid (Krebs) cycle*Makes ____ ATP*Makes ___________*Takes place in ____________
3rd step – Electron Transport Chain*Makes _____ ATP*Uses ______ to make _______*Takes place in _______________
Glycolysis – cytoplasmReactants: glucose
Products: 2 ATP and broken glucose
Krebs Cycle – matrixReactants: broken glucose
Products: CO2, 2 ATP, NADH and FADH2
ETC – inner membraneReactants: O2, NADH and FADH2
Product: Water and 32 ATP!!!
Cellular Respiration
Glycolysis
Citric Acid CycleKreb’s Cycle
Electron Transport Chain
Glucose
Broken glucose
2 ATP
Broken glucoseCO2
2 ATP
32 ATP
NADH and FADH
NADH and FADH
Oxygen
Water
October 14, 2009
Warm – Up: Write the question and answer!!!
1. Which process is an energy releasing one? a. Photosynthesis b. Cellular Respiration
2. Which statement is true?a. Only animal cells undergo CR. b. Only plant cells undergo CR. c. Both animals and plants undergo CR.
3. What molecule is broken down to make ATP?a. Glucose b. Water c. Carbon Dioxide d. Water
CR Review: Identify A, B, C, D, E
Review Photosynthesis and Cellular Respiration
• Make sure you know…– Equations of each!– Reactants of each!– Products of each!– How they are alike!– How they are different!– How they depend on each other!
***Check your understanding***
Explain the process of Photosynthesis to a neighbor using the following terms :
carbon dioxide light energy
glucose food
oxygen gas
process water
chloroplast plants
Write out your explanation using the above terms.
***Check your understanding*** Why do you think cells under go the process
of cellular respiration?
Explain the process of cellular respiration using the following terms:
carbon dioxide food molecules
glucose cells
oxygen gas
process ATP
Mitochondria water
Complete the following chart
Description of Process Reactants Products
Photosynthesis
Cellular Respiration
What do you notice about the reactant and products of cellular respiration in comparison to the reactants and
products of photosynthesis?
Compare photosynthesis and cellular respiration…
Photosynthesis Cellular Respiration
Comparison of photosynthesis and aerobic respiration
PHOTOSYNTHESIS AEROBIC RESPIRATION
Involves energy XRequires enzymes X XInvolves movement of e- X X
Forms CO2 & H20 XUses CO2 & H20 X Uses starches/ sugars & O2 XForms starches/ sugars & O2 X
X
Compare the 2 Processes…
• Table
• Venn Diagram
• Photosynthesis Flow Chart
• Cellular Respiration Flow Chart
Stations
• Photosynthesis Review
• Cellular Respiration (CR) Review
• Manipulative Review Station– Do the equation for Photosynthesis– Do the equation for CR
• T Chart – Compare Photosynthesis & CR
• Ring of Truth – Put the true statements inside the inner circle and the false statements outside the inner circle