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Cellular Respiration and Fermentation. sun. light energy. . CO 2. +. H 2 O. +. +. O 2. C 6 H 12 O 6. glucose. H 2 O. ATP energy. +. . +. +. O 2. CO 2. H 2 O. C 6 H 12 O 6. even though this equation is a bit of a lie … it makes a better story. Energy cycle.

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Presentation Transcript
energy cycle

sun

light

energy

CO2

+

H2O

+

+

O2

C6H12O6

glucose

H2O

ATP

energy

+

+

+

O2

CO2

H2O

C6H12O6

even thoughthis equationis a bit of a lie…it makes a

better story

Energy cycle

Photosynthesis

plants

CO2

O2

animals, plants

Cellular Respiration

ATP

The Great Circleof Life,Mufasa!

slide3
ATP
  • ATP is biological energy
    • ATP + water  ADP + P = energy
    • When you break the bond you get energy
    • ATP = stored energy
    • ADP = used energy
cellular respiration

ATP

energy

+

+

+

C6H12O6

6O2

6CO2

6H2O

Cellular Respiration
  • Process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.

38 ATP

produced

Glucose

slide5

Oxygen required

2 ATP needed

Cytoplasm

If no oxygen is present then fermentation occurs

CO2 released

2 ATP produced

34 ATP produced

4 ATP produced

glycolysis occurs in cytoplasm
Glycolysis(occurs in cytoplasm)
  • Break down glucose into 2 pyruvate molecules
    • Glucose has 6 carbon
    • Pyruvate has 3 carbon
  • No oxygen in required (anaerobic)
  • Needs 2ATP to happen
  • Generates 4ATP
  • Net gain of 2ATP at the end of the process
after glycolysis
After Glycolysis
  • If oxygen is present, pyruvate moves to mitochondria where cellular respiration occurs.
  • If not oxygen is present, pyruvate is used for alcoholic or lactic acid fermentation.
cellular respiration occurs in two steps
Cellular respiration occurs in two steps
  • Kreb’s cycle or citric acid cycle
    • Produced 2ATP
  • Electron transport chain
    • Produced 34 ATP

Both processes require oxygen and occur in the mitochondria

kreb s cycle
Kreb’s cycle
  • Pyruvic acid produced from glycolysis is used to make
    • Carbon dioxide
    • NADH
    • ATP
    • FADH2
  • 4 ATP are produced for immediate use for cell processes
  • NADH and FADH2 carry electrons to the electron transport chain to make more energy
  • CO2 is released from the cell
electron transport chain
Electron transport chain
  • The ETC used high energy electrons from the Kreb’s cycle to convert ADP to ATP.
  • ETC is composed of a series of carrier proteins in the inner membrane of the mitochondria.
  • Water is produced and released at the end of the ETC.
  • 34 ATP are produced in the end
fermentation
Fermentation
  • Two types
    • Alcoholic fermentation
    • Lactic acid fermentation

Both processes do not require oxygen (anaerobic) and occur after glycolysis.

alcoholic fermentation
Alcoholic fermentation
  • Yeasts and a few other microorganisms use this process
  • CO2 bubbles that are released from this process cause bread to rise.
  • Also used to make beer and wine
lactic acid fermentation
Lactic acid fermentation
  • Occurs in humans and other eukaryotes
  • Muscle cramps are caused by a build up of lactic acid
    • When you exercise vigorously, the large muscles run out of oxygen quickly.
    • Your muscles quickly produce ATP using lactic acid fermentation.
    • Lactic acid builds up which causes your muscles to ache.
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