7/30/2019 Chapter 15 Cellular Respiration 1
http://slidepdf.com/reader/full/chapter-15-cellular-respiration-1 1/6
12/28/2011
Power point@lecture Slides Are Prepared By Biology Lecturer, KMPk
15.1: Types of respiration: aerobic and
anaerobic
15.2 : Aerobic respiration
15.3 : Anaerobic respiration :fermentation and application
What is IRREVERSIBLE INHIBITOR?Example:
Enzyme classification:
oxidoreductase transferase ,
hydrolase ,
lyase
isomerase and ligase .
a) Describe the needs for energy and the role of respiration in living organisms.
b) Describe aerobic and anaerobic respiration and therequirement for such conditions.
c) Describe the oxidation of glucose which involves
glycolysis, Krebs cycle and oxidativephosphorylation
How do living organisms get energy?
Food (e.g:carbohydrate)
Digestion (enzyme)
Glucose
Cellular respiration begins
energy
7/30/2019 Chapter 15 Cellular Respiration 1
http://slidepdf.com/reader/full/chapter-15-cellular-respiration-1 2/6
12/28/2011
Biology Unit, KMPk
Movement
Reproduction
Growth
Respiration
Excretion
NutritionExcitability/ coordination
What is cellular respiration?
The catabolic pathway of aerobic andanaerobic respiration, which break downorganic molecules and use an electrontransport chain for the production of ATP.
(Campbell,9 th edition)
9
Mitochondria
Organelle where cellular respiration takes place.
Innermembrane
Outermembrane
Innermembrane space
MatrixCristae
copyright cmassengale
- produce energy to carry out life process- cell energy= ATP
Role of Respiration
How do the catabolic pathways that decomposeglucose and other organic fuels yield energy?
Transfer of electrons during thechemical reactions
becomes oxidized
becomes reduced
Redox Reaction
The transfer of electrons during chemical reactions
releases energy stored in organic molecules. . Oxidation-Reduction reactions or Redox Reactions
TWO types:Oxidation Reduction
7/30/2019 Chapter 15 Cellular Respiration 1
http://slidepdf.com/reader/full/chapter-15-cellular-respiration-1 3/6
7/30/2019 Chapter 15 Cellular Respiration 1
http://slidepdf.com/reader/full/chapter-15-cellular-respiration-1 4/6
12/28/2011
Anaerobic Respiration andFermentation
Most cellular respiration requires O 2 to produce
ATP. (by Aerobic Respiration )
However , two mechanisms which certain cells
can generate ATP without the use of oxygen.
a. Anaerobic Respiration
b. FermentationDetail in 15.3
Anaerobic Respiration andFermentation
Anaerobic respiration differs from aerobic
respiration in 3 ways:
a. Break down glucose in the absence of oxygen.
b. Do not completely breakdown glucose into
carbon dioxide and water (but : lactic acid and
alcohol).
c. Releases less energy
A catabolic pathway for organic molecules (sugar), using oxygen as the final electron acceptor in anelectron transport chain and ultimately producingATP.
Aerobic Respiration
The Stages of CellularRespiration
The harvesting of energy from glucose has THREEstages:a. Glycolysis
- Cytoplasmb. Krebs Cycle
(Pyruvate oxidation and Citric acid cycle)- Matrix of Mitochondrion
c. Oxidative Phosphorylation :Electron Transport Chain and Chemiosmosis.- Cristae/Inner membrane or mitochondrion
Figure 9.6-1
Electronscarried
via NADH
Glycolysis
Glucose Pyruvate
CYTOSOL MITOCHONDRION
ATP
Substrate-level phosphorylation
7/30/2019 Chapter 15 Cellular Respiration 1
http://slidepdf.com/reader/full/chapter-15-cellular-respiration-1 5/6
12/28/2011
Figure 9.6-2
Electronscarried
via NADH
Electrons carriedvia NADH and
FADH2
Citricacid
cycle
Pyruvate oxidation
Acetyl CoA
Glycolysis
Glucose Pyruvate
CYTOSOL MITOCHONDRION
ATP ATP
Substrate-levelphosphorylation
Substrate-levelphosphorylation
Figure 9.6-3
Electronscarried
via NADH
Electrons carriedvia NADH and
FADH2
Citricacid
cycle
Pyruvateoxidation
Acetyl CoA
Glycolysis
Glucose Pyruvate
Oxidative
phosphorylation:electron transport
andchemiosmosis
CYTOSOL MITOCHONDRION
ATP ATP ATP
Substrate-levelphosphorylation
Substrate-levelphosphorylation
Oxidativephosphorylation
Types of ATP Production
Substrate Level PhosphorylationThe enzyme-catalyzed formation of ATP bydirect transfer of a phosphate group to ADPfrom an intermediate substrate in catabolism
Substrate
Product
ADP
PATP
Enzyme Enzyme
Example Substrate LevelPhosphorylation
Glycolysis: Energy Payoff Phase
2 NADH2 ATP
2 ADP 2
2
2 NAD + 2 H
2 P i
3-Phospho-glycerate
1,3-Bisphospho-glycerate
Triosephosphate
dehydrogenase
Phospho-glycerokinase
67
Oxidative PhosphorylationThe production of ATP using energy derivedfrom the redox reactions of an electrontransport chain.
Generates most of ATP (90%).
Types of ATP Production
30
What is cellular respiration?Types of Respiration:Aerobic RespirationAnaerobic Respiration
What is ATP?State the stage of aerobic respiration.Mode of ATP synthesis?Substrate Level PhosphorylationOxidative Phosphorylation
Conclusion
Top Related