Shared Flashcard Set

Details

Cellular Respiration
N/A
15
Biology
Undergraduate 1
03/29/2009

Additional Biology Flashcards

 


 

Cards

Term

 

Cellular Respiration

Definition

aerobic degeneration of sugar into carbon dioxide and water, releasing ATP

 

C6H12O6 + 6O26CO2 + 6H2O + energy

Term

Fermentation

 

Definition
anaerobic partial degredation of sugars
Term
Oxidation
Definition
atom LOSES an electron (hydrogen and energy)
Term

Reduction

 

Definition
an atom GAINS an electron (hydrogen and energy)
Term
Phosphorylation
Definition
adding a phosphate group to ADP to create ATP
Term
Substrate Level Phosphorylation
Definition
  • occurs in glycolysis and Krebs cycle

 

  • an enzyme transfers a P from a substrate to ADP
Term
Oxidative Phosphorylation
Definition
  • Occurs in the Electron Transport Chain (ETC)

 

  • Energy is released through a series of redox reactions along a gradient

 

  • Creates a lot of ATP
Term

Three phases of Cellular Respiration

Definition
  1. Glycolysis
  2. Krebs cycle/Citric Acid cycle
  3. Electron Transport Chain (ETC)
Term
Glycolysis
Definition
  • the sugar breaking step
  •  substrate level phosphorylation
  • occurs in cytosol of the cell
Term
Glycolysis - energy investment phase
Definition
2 ATP used to break a 6-carbon sugar into 2 3-carbon sugars (G3P: glyceraldehyde-3-phosphate) 
Term
Glycolysis - Energy payoff phase
Definition

results in:

  • 4 ATP molecules, net of 2
  • 2 molecules of NADH
  • 2 pyruvate molecules
Term
The Krebs Cycle (Citric Acid cycle)
Definition
  • cyclic series of redox reactions that occur in the mitochondria membrane
  • oxidation of acetyl CoA
  • reduction of electron carriers
Term
conversion of pyruvate to acetyl CoA
Definition
  • junction between glycolysis and the citric acid cycle
  • CO2 molecule diffuses out of cell and NADH is generated (1 per pyruvate)

 

Term
Krebs Cycle yields
Definition
  • 8 NADH
  • 2 FADH2
  • 2 ATP
  • 6 CO2
Supporting users have an ad free experience!