[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f5l8SW-4a915TOcQ5mSli0KbO4AQeB0wZ-OXhyy2KCxA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2025-06-08 23:17:14",196530093,[8,9,10,11],"ATP","acetyl-CoA","long-chain fatty acids","fructose 1,6-bisphosphate",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},81,"ecb63186fd2348dd972900f765a15722","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe91b8b9d3b83a0d6a9d655b826214095.jpg","Biochemistry 《生物化学》一 专业基础课（全英教学）","1fd05cfa460b43e29c5bfa40739362b7","Test 15 - Lecture 15","Pyruvate kinase is activated by _____________________",[21,26,35,44,49,55,64,73,82,91],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],196530094,[30,31,32,33],"1,000","1,500","2,000","2,500","In humans, about ______ genes (~12% of all genes) encode regulatory proteins, including a variety of receptors, regulators of gene expression, and more than 800 different protein kinases",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],196530095,[39,40,41,42],"0.9","1.7","4.6","10.7","Average half-life of proteins in mammalian liver is ____ day(s)",{"answer":45,"createTime":5,"id":46,"options":47,"question":48,"source":24,"type":25},[],196530096,[39,40,41,42],"Average half-life of proteins in mammalian brain is ____ day(s)",{"answer":50,"createTime":5,"id":51,"options":52,"question":54,"source":24,"type":25},[],196530097,[39,40,53,42],"4.1","Average half-life of proteins in mammalian muscles is ____ day(s)",{"answer":56,"createTime":5,"id":57,"options":58,"question":63,"source":24,"type":25},[],196530098,[59,60,61,62],"2","3","4","5","For an allosteric enzyme with a Hill coefficient of ___, activity increases from 10% Vmax to 90% Vmaxwith only a 3-fold increase in [S], compared with the 81-fold rise in [S] needed by an enzyme with no cooperative effects (Hill coefficient of 1)",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":24,"type":25},[],196530099,[68,69,70,71],"1\u002F4","1\u002F3","1\u002F2","3\u002F4","By far the most common modifications are phosphorylation and dephosphorylation; up to ____ of the proteins in a eukaryotic cell are phosphorylated under some circumstances",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":24,"type":25},[],196530100,[77,78,79,80],"raise both [ATP] and [AMP]","raise [ATP] and lower [AMP]","lower both [ATP] and [AMP]","lower [ATP] and raise [AMP]","The levels of ATP and AMP are a sensitive reflection of a cell's energy status, and when the [ATP]\u002F[AMP] ratio decreases, the AMP-activated protein kinase (AMPK) triggers a variety of cellular responses to _____________________",{"answer":83,"createTime":5,"id":84,"options":85,"question":90,"source":24,"type":25},[],196530101,[86,87,88,89],"0, 1","0, 5","0, 10","0, 100","Quantitative data on metabolic flux can be used to calculate a flux control coefficient, C, for each enzyme in a pathway. This coefficient expresses the relative contribution of each enzyme to setting the rate at which metabolites flow through the pathway—that is, the flux, J. C can have any value from ___ (for an enzyme with no impact on the flux) to ___ (for an enzyme that wholly determines the flux)",{"answer":92,"createTime":5,"id":93,"options":94,"question":99,"source":24,"type":25},[],196530102,[95,96,97,98],"total kinetic properties","intrinsic regulating properties","intrinsic kinetic properties","external kinetic properties","The elasticity coefficient, ε, expresses quantitatively the responsiveness of a single enzyme to changes in the concentration of ametabolite or regulator; it is a function of the enzyme's _____________________"]