[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fKx-Qxo3_VApfUmsO_JYnL5uPbd1d-pBI726t7hnMc30":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-04-26 19:45:09",184745193,[8,9,10,11],"0","1","2","3",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},125,"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）","e9ae3d8bd84d4fb4a587a369705d2aad","Test 3 - Lecture 3","When pH = pI, the net charge of a protein is _____",[21,32,39,44,53,62,71,80,83,88],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],184745186,[25,26,27,28],"mass or 3D structure","mass or charge","3D structure or charge","mass or 2D structure","Electrophoresis separates proteins on the basis of _________________","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":38,"source":30,"type":31},[],184745187,[10,11,36,37],"4","5","____ cysteines form a cystine by reversible formation of a disulfide bond via oxidation",{"answer":40,"createTime":5,"id":41,"options":42,"question":43,"source":30,"type":31},[],184745188,[10,11,36,37],"Desmosine is formed from ___ lysine residues, which is found in the fibrous protein elastin",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],184745189,[48,49,50,51],"consensus","signature","repeat","nonconsensus","When a series of related nucleic acid or protein sequences are compared, a ____________ sequence is the one that reflects the most common base or amino acid at each position",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],184745190,[57,58,59,60],"Acetylation","Phosphorylation","Glycosylation","Prenylation","_______________ is the most common type of regulatory modification of proteins",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],184745191,[66,67,68,69],"Gly","Gln","Glu","Pro","The one-letter code for 20 amino acids was devised by the American biochemist Margaret Oakley Dayhoff, considered by many to be the founder of the field of bioinformatics. Q is ____",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],184745192,[75,76,77,78],"net electric charge","size","binding affinity","number of amino acid residues","Ion-exchange chromatography separates proteins based on their differences in _____________________",{"answer":81,"createTime":5,"id":6,"options":82,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":84,"createTime":5,"id":85,"options":86,"question":87,"source":30,"type":31},[],184745194,[9,10,11,36],"After removal of the precursor signal peptide, human proinsulin is post-translationally cleaved into three peptides: the B chain and A chain peptides, which are covalently linked via two disulfide bonds to form insulin, and C-peptide. So human insulin contains ____ chains",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":30,"type":31},[],184745195,[92,93,94,95],"Leu","Lys","Arg","His","The one-letter code for 20 amino acids was devised by Margaret Oakley Dayhoff, considered by many to be the founder of the field of bioinformatics. K is ________"]