Cellular respiration
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Cellular Respiration. 7.3 Aerobic Respiration. Stages Aerobic Respiration. Stage 1: Stage 2: Stage 3: Stage 4: Glycolysis occurs in _______________________

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Cellular Respiration

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Cellular respiration

Cellular Respiration

7.3

Aerobic Respiration


Stages aerobic respiration

Stages Aerobic Respiration

  • Stage 1:

  • Stage 2:

  • Stage 3:

  • Stage 4:

  • Glycolysis occurs in _______________________

  • Stage 2 – 4 occurs in ________________________- possess _____________________ membrane: outer membrane as well as an inner membrane (highly folded)- ____________________________ space between both membranes (fluid filled)- inner membrane contains mitochondrial __________________________ (protein-rich liquid that fills interior)


Aerobic cellular respiration overview

Aerobic cellular respiration: Overview


Aerobic respiration an overview

Aerobic respiration: An overview

A series of enzyme controlled reactions

  • ______________________ is used to oxidize glucose

  • ________________________ to form ___________

  • ________________________ to form ___________

    During the oxidation of glucose:

  • Electrons transferred to electron carriers, _________ and _________

  • Electrons then passed through an ________________ ____________________________

    • The ________________________ from the electrons will be used to pump _______________.

    • The energy from the _____________________ of protons will be used to make _________.


Stage 2 pyruvate oxidation

Stage 2: Pyruvate Oxidation

  • Recall: reactions of glycolysis produced TWO ________________________, TWO __________, and 2 ________________- does not require _______ ; occurs in ________________________

  • Pyruvate Oxidation: chemical pathway that connects glycolysis to Krebs cycle

  • 2 pyruvate molecules are moved from the cytoplasm to the ___________________ of the mitochondria

    • ______________ is removed from each _____________________ molecule and released as a ____________________ product (1/3 of what you exhale)


Stage 2 pyruvate oxidation cont

Stage 2: Pyruvate Oxidation Cont.

  • The remaining 2-carbon portions are oxidized by ______________; As a result, the NAD+ molecule gains two hydrogen atoms and the remaining ________________ molecule becomes ________________________

  • _________________________ (Co-A) attaches and forms ________________________

  • Acetyl-coA enters stage 3 (Krebs cycle) and NADH goes to _______________________

  • 2 ___________ diffuses out of the mitochondria and cell.


Stage 3 krebs cycle

Stage 3: Krebs Cycle

  • This is an _________ step and cyclic stage

    • cyclic because one of the products of step 8, is a reactant in step 1

  • At the end of the Krebs Cycle, all __________ carbons have been oxidized to _____________ and released from the cell as metabolic _________________

  • All that remains is some free ____________________ in the form of ____________ and high energy ____________ and _______________

    • These energy carriers enter the ___________


Krebs cycle the details

Krebs Cycle: The Details

  • Cycle occurs ________________ for each ______________________ molecule

  • Acetyl CoA adds 2-carbons to ___________________, producing _______________________

  • Citrate loses a __________ molecule, and the resulting compound is ___________________, reducing NAD+to _________________

  • Another CO2 is ______________, and the resulting compound is oxidized, reducing NAD+ to NADH

  • ADP is ___________________________ to _________

  • Two hydrogen's are transferred to ______________ to form __________________

    Kreb Cycle


Krebs cycle overview

Krebs Cycle Overview

1 Glucose=

EACH _____________________ molecule produced in glycolysis (2) must enter the Krebs Cycle

Therefore the cycle occurs ____________________ for every _____________________ molecule


Stage 4 etc

Stage 4: ETC

  • _____________________________________: release the _______________________ they received during glycolysis and the Kreb’s cycle to ETC- ______________________ of the ETC transfer the electrons and use the energy released to pump _____________________ ions (protons)

  • Hydrogen ions (protons) are pumped from the _____________________ to the ___________________ space

    • Creates a _______________________ gradient


Stage 4 etc cont

Stage 4: ETC Cont.

  • ____________________: final electron _________________ at the end of the ETC- oxygen accepts the electrons, combines with ___________ and becomes __________________

  • The accumulated hydrogen ions (protons) diffuse back into the matrix through _________________________________- The energy released from the diffusion fuels the formation of _____________ (by pumping H+ ions into intermembrane space)

  • ETC: - __________________ delivers electrons continuously- __________________ delivers ____________________ energy electrons in different place than NADH (cannot pump as many H+ ions)

  • Electron Transport Chain animation

  • Electron Transport Chain

  • Electron Transport Chain


Stage 4 cont chemiosmosis

Stage 4 Cont: Chemiosmosis

  • H+ ions accumulate in ________________________ space from ETC- creates an _________________________ gradient

  • H+ ions (protons) move from intermembrane space to ___________________________________- energy in gradient forces them through

  • Energy ________________________ as H+ ions pass through = binds ADP with Pi to produce _________!

  • Energy removed from 1 NADH = ______ ATP’s; 1 FADH2 = ______ ATP’s

    Oxidative _________________________________: Because the energy needed to add the _______ group to ADP is derived from the ___________________ of a glucose molecule aka oxidative ATP synthesis


Final points

Final Points…

  • ATP is now sent to the _______________________ to be utilized by the cell

  • All stages are dependent on __________________ for the production of ____________________

  • Last stages are dependent on the availability of _______________________ (from food– glucose) and _______________________


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