krebs cycle

• what is meant by a Krebs cycle


  this is a means of liberating energy for carbon bonds to provide ATP and reduced NAD
• Where does the Krebs cycle occur?


  mitochondrial matrix
• how many times will the Krebs cycle occur per glucose molecule and why


  2 time , as two pyruvate were made per glucose in glycolysis
• what happens during the conversion of pyruvate to acetyl-coenzyme A


  carbon dioxide will be produced and a molecule of reduced NAD is formed
• what happens during the Krebs after the carbon dioxide is removed from the acetyl coenzyme


  a 4 carbon molecule will combine with a two carbon portion of acetyl coenzyme a
• what happens to the coenzyme carrier molecule when a 6 carbon molecule is formed


  the coenzyme is released
• what happens in the Krebs cycle when after the coenzyme has been removed from the 6 carbon molecule


  the 6C molecule will be decarboxylated and oxidised into 5C
• when 6C is decarboxylated into 5C it loses a hydrogen as well as a carbon dioxide ,what happens to the hydrogen


  it is used to reduced nad into reduced nad
• what happens in the Krebs cycle after a 5 carbon molecule is formed


  a second oxidation occurs and another decarboxylation occurs
• what is made after a 5 carbon molecule is produced in the Krebs cycle for the 5 carbon molecule to become a 4 carbon molecule


  5C will be decarboxylated and oxides into 4C
• when 5C is being converted into 4C a hydrogen is lost ,what happens to the hydrogen


  it will reduce NAD into reduced NAD
• when 5C is being converted into 4C ,more carbon-carbon bonds are being broken what is this energy used for


  it is used to synthesize ATP from ADP and pi
• in the Krebs cycle what happens to the 4 carbon molecule that is produced from the previous 5 carbon molecule


  it is further oxidised and the hydrogens that are removed are used to form reduced nad and reduced fad to produce the starting moleuculeSee an expert-written answer!We have an expert-written solution to this problem!
• What is the starting molecule for the Krebs cycle?


  Acetyl CoA and a 4- carbon molecule
• in the Krebs cycle how many reduced NAD molecules are produced per glucose molecule


  6
• in the Krebs cycle how many carbon dioxide molecules are produced per glucose molecule


  4
• in the Krebs cycle how many reduced FAD molecules are produced per glucose molecule


  2
• in the Krebs cycle how many ATP molecules are produced by substrate level phosphorylation per glucose molecule


  2
• How many decarboxylation reactions happen in one turn of the Krebs cycle?


  2
• How many dehydrogenations occur per turn of the Krebs cycle


  4 , 3 reduced NAD and 1 reduced FAD
• what is meant by substrate level phosphorylation


  Production of ATP by transferring phosphates directly from metabolic products to ADP
• what is the fate of the reduced nad and reduced fad produced in the Krebs cycle


  they will deliver hydrogen to the electron transport chain