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14 Cards in this Set
- Front
- Back
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What is the krebs cycle?
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is a series of enzyme-catalysed chemical reactions, which is of central importance in all living cells that use oxygen as part of cellular respiration.
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Very first thing that has to happen?
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The pyruvate created from glycolysis has to move into the mitochondrian (in eukaryoitc cells).
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What are co-enzymes? Why are they important?
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- non-protein
- many are vitamin derived - functional group or electron carriers - many are made from nucleic acids Important in step three of the process. |
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Co-enzyme A/?
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Important in third step. made from vitamin B5.
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Once pyruvate is converted into Acetyl-coA, what is the first major step of the Krebs?
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Acetyl-coa turns into the 6 carbon citrate`
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Second major step?
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NADH and a CO2 is ripped off as it becomes a 5 carbon, and the same things again as it becomes a 4 carbon.
*Going between the 5 and 4 carbon creates one ATP. |
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What is FADH2?
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Flavin adenine diphosphate. An electron carrier, somewhat like NADH, but the e- it carries has less potential energy than those in NADH.
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What's important to remember about all electron carriers?
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Partially made up of nucleic acids.
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Part 3?
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The four carbon goes into the final four carbon state (oxolacetate), and then the cycle repeats with the donation of two more carbons from incoming acetyl-coa.
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Potential energy output of Krebs cycle?
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From 1 glucose -- 2 Krebs cycles
8 NADH 2 FADH2 2 ATP ** 2 of the NADH are from the conversion of pyruvate to acetyl-coA. |
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Most energy harvested is conserved by what?
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NADH
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Most ATP will be generated when?
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once NADH and FADH2 feed their electrons
into the electron transport chain & oxidative phosphorylation |
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Finish this sentence:
2 carbons enter (Acetyl-CoA) cycle and |
2 different carbons leave as CO2
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Starting with citrate, what are the 8 forms the Krebs cycle takes?
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Citrate, Isocitrate, Alpha Ketroglutarate, Succinyl CoA, Succinate, Fumarate, Malate, Oxoloacetate.
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