Flashcards
ATP
Cards in this deck (12)
- 1What is the role of phosphofructokinase?an alloseric enzyme that catalyzes the third step of glycolysis
- 2Which factors affects phosphofructokinase?ATP inhibits when accumulated
ADP stimulates
Citrate inhibits when accumulated - 3less ATP will be produced when ATP levels are _____ and ADP levels are ____high, low
- 4A 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 - 5Why 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 - 6Acetyl-CoA regulates ______________ production. Explain how oxaloacetate affects ATPoxaloacetate.
Low oxaloacetate concentration levels indicates high [acetyl-CoA], activating the enzyme that produces oxaloacetate, and ATP overall - 7__________ and ____________ are major intersections of other related catabolic pathways of cellular respirationglycolysis and krebs cycle
- 8In the first stage of protein metabolism, amino groups are removed from the amino acids in a process called _________________.deamination
- 9what 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
- 10leucine is converted into _____________, alanine is converted into ______________, and proline is converted into __________________.acetyl-CoA
pyruvate
a-ketoglutarate - 11What 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.
- 12where 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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- - factors affecting the production of ATP - controlling cellular respiration - protein & lipid catabolism
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- itstinachen
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