the steps to the krebs cycle

• what is the first step top the kreb's cycle?

  the acetyl group is released from acetyl co enzyme A and combines with a four-carbon compound called oxaloacetate to form a six carbon compound called citrate.
• whqat is the second step to the kreb's cycle?

  The citrate is decarboxylated and hydrogenated, producing a five carbon compound and one molecule of reduced NAD
• what is the third in the kreb's cycle?

  the five carbon compound from the previous step is further decarboxylated and hydrogenated to produce a four carbon compound, a molecule of carbon dioxide, and one molecule of reduced NAD
• what is the fourth step of the kreb's cycle?

  The four-carbon compound temporarily combines with and is then released from coenzyme A. At this state, substrate level, phosphorylation takes place and produces a molecule of ATP.
• what is the fifth step of the kreb's cycle

  The four carbon compound is hydrogenated to produce a different four carbon compound and a molecule of reduced FAD
• what is the sixth step of the kreb's cycle

  Rerrangement of the atroms in the four carbon molecule catalysed by an isomerase enzyme, followed by further hydrogenation, regenerates a molecule of oxaloacetate and so the cycle continues.
• For each molecule of glucose, how many turns are there of the kreb's cycle?

  2
• how many molecules of reduced NAD are formed from the link reaction?

  2
• How many molecules of reduced FAD are formed per molecule of glucose, in the link reaction?

  0
• How many molecules, per glucose molecule, of carbon dioxide are formed in the link reaction?

  2
• How many molecules, per glucose molecule, of ATP are formed by the link reaction?

  0
• How many molecules, per glucose molecule, of reduced NAD are formed during the kreb's cycle?

  6
• How many molecules of reduced FAD, per glucose molecule, are formed in the kreb's cycle?

  2
• How many molecules, per molecule of glucose, of carbon dioxide are formed in the kreb's cycle?

  4
• how many molecules, per molecule of glucose, of ATP are formed in the kreb's cycle?

  2
• Although oxygen isnt directly used in the link reaction and kreb's cycle, these stages will not occur in the absence of oxygen so they are aerobic.