Flashcards by itstinachen, updated more than 1 year ago
Created by itstinachen almost 6 years ago


- factors affecting the production of ATP - controlling cellular respiration - protein & lipid catabolism

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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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