1502560
Description
Flashcards by itstinachen, updated more than 1 year ago
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Created by itstinachen
over 9 years ago
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| Question | Answer |
| What is the role of phosphofructokinase? | an alloseric enzyme that catalyzes the third step of glycolysis |
| Which factors affects phosphofructokinase? | ATP inhibits when accumulated ADP stimulates Citrate inhibits when accumulated |
| less ATP will be produced when ATP levels are _____ and ADP levels are ____ | high, low |
| A high concentration of NADH in a cell indicates that ______________________(sentence). In this case, NADH allosterically inhibits ___________ _______________ and reduces the amount of ______________ that is fed into the Krebs cycle, restricting the amounts of NADH produced. | the electron transport chains are full of electrons and ATP production is high. pyruvate decarboxylase acetyl-CoA |
| Why is the final electron acceptor (oxygen) so important? | - so ATP could be produced - the continual transfer of electrons throughout ETC (to sustain conc. difference) - which depends on the availability of oxygen. without O2 to free up cytochrome oxidase, NADH and FADH2 cant pass e- down ETC and the H+ can't be pumped into the intermembrane space ---/ ATP synthesis |
| Acetyl-CoA regulates ______________ production. Explain how oxaloacetate affects ATP | oxaloacetate. Low oxaloacetate concentration levels indicates high [acetyl-CoA], activating the enzyme that produces oxaloacetate, and ATP overall |
| __________ and ____________ are major intersections of other related catabolic pathways of cellular respiration | glycolysis and krebs cycle |
| In the first stage of protein metabolism, amino groups are removed from the amino acids in a process called _________________. | deamination |
| what does deamination do? | it's the first stage of protein catabolism. the process converts the amino group of the amino acids into ammonia (NH3) as a waste product into the urea |
| leucine is converted into _____________, alanine is converted into ______________, and proline is converted into __________________. | acetyl-CoA pyruvate a-ketoglutarate |
| What happens to glycerol during lipid catabolism? | The glycerol portion may be converted into glucose in a process called gluconeogenesis, or it may be changed into dihydroxyacetone phosphate (DHAP) and then 3-phosphoglycerate (G3P) and fed into the glycolytic pathway for energy production. |
| where is ß-oxidation found? | fatty acids undergo ß-oxidation, 2C fragments are sequentially removed (combines with CoA to form acteyl-CoA and enter krebs cycle.) |
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