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10 Cards in this Set

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what is the purpose of the krebs cycle?
the break down pyruvate in order to release high energy electrons that will be transported to the electron transport chain
where does the krebs cycle take place?
in the mitochondrial matrix
what is the first step of the krebs cycle?
pyruvate must be tranferred into the mitochondria from the cytoplasm using 2 electrons from glycolysis
what is the second step of the krebs cycle?
pyruvate molecules are broken down into a 2 carbon molecule called Acetyl-CoA, releasing CO2 and 2 electrons which help to convert NAD to NADH
what is the third step to the krebs cycle?
acetyl-CoA combines with a 4 carbon compound to create a 6 carbon compound called citric acid, releasing 4 electrons which help to convert NAD to NADH and FAD to FADH2
what is the is the fourth step in the krebs cycle?
citric acid is broken down into a 5 carbon compound called a-ketoglutarate, releasing CO2 and 2 electron which help to convert NAD to NADH
what is the 5th step of the krebs cycle?
a-ketoglutarate is broken down into a 4 carbon compound, releasing CO2 and 2 electrons which help to convert NAD to NADH. *the energy is also provided to convert ADP to ATP*
what should you remember about the krebs cycle?
it occurs once for every one pyruvate, but glucose breaks down into 2 pyruvate molecules in the glysolysis process. so for one glucose molecule the krebs cycle turns 2 times
what are the important products of one turn of the krebs cycle?
4NADH, 1FADH2, 10 electrons, 3CO2, 1 ATP
what are the important products of the krebs cycle for one molecule of glucose?
8NADH, 2FADH2, 20 electrons,6CO2, 2ATP