Cellular Respiration By: Viviana Arellano

Chemical Formula

(products) c6h12o6 + 6o2 ---> 6co2 + 6h2o (reactants)

Steps Glycolisis

  • Glycolisis occurs in the cytoplasm( cytosol)
  • Phosphate group is transferred from ATP to glucose, creating a glucose with 6 phosphates
  • The glucose-6-phosphate is turned into a fructose-6-phosphate
  • The fructose is then split to form two three-carbon sugars.
  • One of the initial three-carbon sugars loses 2 electrons and 2 protons reducing NAD+ to NADH in additon prodcucng an H+
  • Then, ADP is given a phosphate which it will use to create a molecule of ATP and creating a 3-phosphate
  • One of the 3-phosphates makes 4 ATP where 2 Of them are used and your end product is 2 ATP
  • The other 3 - phosphate group in the net converts to glucose giving you an end product of 2 pyruvates plus a molecule of water

Steps of Krebs Cycle

  • two carbons pieces of pyruvate is used to make acetyl-CoA
  • During the above process carbon dioxide is produced as well as a formed NADH molecule.
  • The two-carbon acetyl from the acetyl-CoA is converted into a 4-Carbon molecule, this making a 6-carbon compound
  • Carbon dioxide is released from the 6-Carbon making it a 5-Carbon compound. This is where hydrogen is removed and moved to transfer from NADH to NAD+
  • Again NADH and Carbon Dioxide are produced. Besides this a molecule of ATP is produced. After this a 4-Carbon molecule is formed.
  • The hydrogen that is removed is then used to form NADH and FADH2. This reaction regenerates the 4-Carbon .
  • This process has to be done twice to break the pyruvate molecule.

Steps of Electron Transport Chain

  • Sunlight hits the chlorophyll and causes the electrons to get excited
  • The excited electrons start to travel through the transport chain
  • The water molecule then splits to fill the electrons that have moved. This split will produce oxygen and hydrogen molecules.
  • The electrons continue their journey, while the electrons are being pumped it gives the protons energy to go from the membrane to the thylakoid space.
  • The loose hydrogen move from high to low concentration and into the ATP Synthase.
  • The first electrons will now move further down the chain and get hit by the light causing the electrons to get excited again.
  • The electrons will then continue through the second transport chain.
  • These electrons will be used to create NADPH, and later used in the Calvin cycle .

Importance of Cellular Respiration

Cellular respiration is very important because it provides energy for all living organisms to preform their necessary functions to maintain life.


  • "Khan Academy." Khan Academy. N.p., n.d. Web. 06 Dec. 2016
  • https://biomanbio.com/HTML5GamesandLabs/PhotoRespgames/photointeractivehtml5page.html
  • "Animation: How the Krebs Cycle Works (Quiz 1)." Animation: How the Krebs Cycle Works (Quiz 1). N.p., n.d. Web. 26 Jan. 2017.


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