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10 Cards in this Set
- Front
- Back
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what is the purpose of the krebs cycle?
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the break down pyruvate in order to release high energy electrons that will be transported to the electron transport chain
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where does the krebs cycle take place?
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in the mitochondrial matrix
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what is the first step of the krebs cycle?
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pyruvate must be tranferred into the mitochondria from the cytoplasm using 2 electrons from glycolysis
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what is the second step of the krebs cycle?
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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
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what is the third step to the krebs cycle?
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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
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what is the is the fourth step in the krebs cycle?
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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
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what is the 5th step of the krebs cycle?
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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*
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what should you remember about the krebs cycle?
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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
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what are the important products of one turn of the krebs cycle?
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4NADH, 1FADH2, 10 electrons, 3CO2, 1 ATP
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what are the important products of the krebs cycle for one molecule of glucose?
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8NADH, 2FADH2, 20 electrons,6CO2, 2ATP
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