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What do wood, a marshmallow and gasoline all have in common? - PowerPoint PPT Presentation


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What do wood, a marshmallow and gasoline all have in common? . They all have stored chemical energy that can be used for energy!!!! . CELLULAR RESPIRATION. C 6 H 12 0 6 + 6O 2  6H 2 0 + 6 C0 2 + 38ATP . 38 ATP for one glucose - CR: 39 % efficient - Car: 25% efficient .

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cellular respiration
CELLULAR RESPIRATION

C6H1206 + 6O2 6H20 + 6 C02 + 38ATP

38 ATP for one glucose

- CR: 39 % efficient

- Car: 25% efficient

obtaining food
Obtaining Food
  • All organisms need food for energy and building materials
energy molecules
Energy Molecules

ATP- Adenosine Triphosphate

( ENERGY CURRECNY)

High Potential Energy

ADP- Adenosine Diphosphate

AMP- Adenosine Monophosphate

exergonic reactions
Exergonic Reactions
  • Release energy
  • Spontaneous
  • Generate energy
endergonic reactions
Endergonic Reactions
  • Input of energy
check yourself
Check Yourself
  • Are Photosynthesis and Cellular Respiration exergonic or endergonic reactions?
energy
Energy
  • Potential energy
    • energy of position, stored energy
  • Kinetic energy
    • energy of motion

Sugars

  • Chemical Energy =
  • Potential Energy
entropy
Entropy

2nd Law of Thermodynamics

Entropy

cards entropy game
Cards Entropy Game
  • Cells are highly organized like the tower we built.
  • According to the Second Law of Thermodynamics, disorder (entropy) is always on the increase.

(easy to break)

  • It takes work maintain order.
  • Cells need energy: to maintain their

order

to repair themselves

to grow

to reproduce

energy molecules1
Energy Molecules

Redox Reactions- Reduction/Oxidation reactions

LEO- Lose Electrons Oxidized

GER- Gain Electrons Reduced

energy molecules2
Energy Molecules

C6H1206 + 6O2 6H20 + 6 C02 + 38ATP

H+ and 1 electron (e-)

Glucose gets oxidized to CO2

LEO- lose electrons ( or Hydrogens)

Oxygen gets reduced to H20

GER- gains electrons ( or Hydrogens)

slide20

Check yourself!

CH4 + 02 C02 + 2H20

Where does the fire come from?

types
Types
  • Anaerobic Respiration

ii. Aerobic Respiration

aerobic respiration overview
Aerobic Respiration Overview

C6H12O6 + 6O2 6CO2 + 6H2O + 38 ATP

Glucose

Oxygen

Carbon

Dioxide

Water

Energy

stages of aerobic respiration
Stages of Aerobic Respiration

1) Glycolysis[cytoplasm]sugar is split in halves called pyruvate

makes 2 ATP

2) Krebs Cycle / Citric Acid Cycle [in mitochondria]breaks down pyruvic acid into CO2

makes 2 ATP

3) Electron Transport Chain[membranes of mitochondria]H+ ions combine with oxygen, making ATP and water

makes32-34 ATP

energy molecules3
Energy Molecules
  • What happens to the thing NAD+ and FAD takes the electrons from?
    • Gets oxidized
    • parts of the broken
    • down Glucose

NAD+ and FAD

  • NAD+ is reduced  NADH
    • accepts 2 electrons and a H
    • (high energy electrons)
  • FAD is reduced FADH2
    • accepts 2 electrons and

2 Hydrogens

glycolysis overview
Glycolysis Overview
  • In the cytoplasm – O2 does not need to be present
  • Split sugar
  • Glucose 6 carbon sugar  split into two 3 carbon sugar (pyruvate)
  • 10 steps – 2 parts
    • Invest energy (spend 2 ATP)
    • 4 ATP formed
      • 2 NET ATP
    • 2 NADH formed
    • 2 Pyruvate and 2 H2O