chapters 9 and 10 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Chapters 9 and 10 PowerPoint Presentation
Download Presentation
Chapters 9 and 10

Loading in 2 Seconds...

play fullscreen
1 / 85

Chapters 9 and 10 - PowerPoint PPT Presentation


  • 113 Views
  • Uploaded on

Chapters 9 and 10. Respiration and Photosynthesis. Metabolism. Catabolism Exergonic Anabolism Endergonic. ATP-Adenosine Triphosphate. Energy Currency Couples catabolic and anabolic reactions Phosphorylation Substrate-level phosphorylation

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Chapters 9 and 10


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
chapters 9 and 10

Chapters 9 and 10

Respiration and Photosynthesis

metabolism
Metabolism
  • Catabolism Exergonic
  • Anabolism Endergonic
atp adenosine triphosphate
ATP-Adenosine Triphosphate
  • Energy Currency
  • Couples catabolic and anabolic reactions
  • Phosphorylation
    • Substrate-level phosphorylation
    • Oxidative phosphorylation
    • Photophosphorylation
oxidation reduction reactions
Oxidation-Reduction Reactions
  • Lose Electrons…Oxidize “LEO”
  • Gain Electrons…Reduce “GER”
nad electron carriers
NAD Electron Carriers
  • NAD+ often serves as an electron carrier in oxidation reactions
  • REDUCED to NADH + H+ (NADH2)
  • Must pass on the electrons to another molecule (be oxidized) and be available as a carrier again
energy production from glucose
Energy Production from Glucose
  • Complete oxidation (Respiration)

Glucose + oxygen  carbon dioxide + water

  • Partial oxidation (Fermentation)

Glucose  Variety of endproducts possible

glycolysis
GLYCOLYSIS
  • Sugar-Splitting
  • 1 Glucose (6 carbons) 

2 pyruvates (3 carbons)

fermentation
Fermentation
  • Can occur in the Absence of Oxygen
  • NADH is reoxidized by handing off electrons to pyruvate or a derivative of pyruvate
  • Various endproducts possible (ethanol - lactic acid - etc.)
  • Most of the energy of the glucose molecule is STILL trapped in the endproducts
review how each molecule of glucose yields many atp molecules during cellular respiration
Review: how each molecule of glucose yields many ATP molecules during cellular respiration
non carbohydrate energy carbon sources
Non-Carbohydrate Energy/Carbon Sources
  • LIPIDS

Lipases split lipids into:

Glycerol (enters cycle at 3PGAL step of glycolysis)

Fatty acids (disassembled 2 carbons at a time to enter the Krebs cycle at Acetyl-CoA step)

non carbohydrate energy carbon sources39
Non-Carbohydrate Energy/Carbon Sources
  • Proteins

Proteases release amino acids which are converted to glycolytic and Krebs Cycle intermediates.

heterotrophs
HETEROTROPHS
  • Acquire organic materials from compounds produced by other organisms
  • Unable to synthesize organic molecules from inorganic raw materials
  • Consumers
autotrophs
AUTOTROPHS
  • Synthesize organic molecules from inorganic raw materials
  • Photoautotrophs (Energy to synthesize from sunlight)
  • Chemoautotrophs (Energy to synthesize from oxidation of inorganic substances)
  • Producers
photosynthesis47
Photosynthesis
  • 6 CO2 + 6 H2O  C6 H12O6 + 6 O2

Plants give off oxygen. Does it come from the carbon dioxide or the water???

an overview of photosynthesis cooperation of the light reactions and the calvin cycle layer 1
An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 1)
an overview of photosynthesis cooperation of the light reactions and the calvin cycle layer 2
An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 2)
an overview of photosynthesis cooperation of the light reactions and the calvin cycle layer 3
An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 3)
the big picture
Light Reactions

Thylakoids

Captures light ENERGY to:

Split water (releasing oxygen gas)

Make NADPH

Make ATP

Calvin Cycle

In the stroma

Use ATP and NADPH to “FIX” carbon dioxide into organic molecules

The Big Picture
photosystems
PHOTOSYSTEMS
  • Two photosystems located in the thylakoid membranes
  • Photosystem I
      • (P700 chlorophyll a)
  • Photosystem II
      • (P680 chlorophyll a)
electron flow
Noncyclic

Both PS I and PS II involved

Passes electrons from water to NADP+

Produces ATP

Produces O2

Cyclic

Function is to produce additional ATP

NO NADPH produced

No water is split

(so no O2 produced)

Is cyclic

Electron Flow
remember the stomata on the leaf and gas exchange
Remember the STOMATA on the leaf and gas exchange

What happens in hot, dry conditions?

The needs of photosynthesis conflict with need for water preservation.

redox reactions
Redox Reactions

What happens to Lactic Acid???

redox reactions78
Redox Reactions

What is Oxidized?

What is Reduced?

redox reactions79
Redox Reactions

C6 H12O6 + 6 O2  6 CO2 + 6 H2O

review how each molecule of glucose yields many atp molecules during cellular respiration81
Review: how each molecule of glucose yields many ATP molecules during cellular respiration