[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$flf5WKv1EBfvX8gcZuxyaeXn9a7ASedZQZ67NR2bsq8I":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",184745194,[8,9,10,11],"1","2","3","4",{"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","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",[21,32,38,43,52,61,70,79,85,88],{"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":37,"source":30,"type":31},[],184745187,[9,10,11,36],"5","____ cysteines form a cystine by reversible formation of a disulfide bond via oxidation",{"answer":39,"createTime":5,"id":40,"options":41,"question":42,"source":30,"type":31},[],184745188,[9,10,11,36],"Desmosine is formed from ___ lysine residues, which is found in the fibrous protein elastin",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":30,"type":31},[],184745189,[47,48,49,50],"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":53,"createTime":5,"id":54,"options":55,"question":60,"source":30,"type":31},[],184745190,[56,57,58,59],"Acetylation","Phosphorylation","Glycosylation","Prenylation","_______________ is the most common type of regulatory modification of proteins",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":30,"type":31},[],184745191,[65,66,67,68],"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":71,"createTime":5,"id":72,"options":73,"question":78,"source":30,"type":31},[],184745192,[74,75,76,77],"net electric charge","size","binding affinity","number of amino acid residues","Ion-exchange chromatography separates proteins based on their differences in _____________________",{"answer":80,"createTime":5,"id":81,"options":82,"question":84,"source":30,"type":31},[],184745193,[83,8,9,10],"0","When pH = pI, the net charge of a protein is _____",{"answer":86,"createTime":5,"id":6,"options":87,"question":19,"source":30,"type":31},[],[8,9,10,11],{"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 ________"]