C)acrossatleastoneintron d)acrossatleastonestopcodon 5 ﹒ TheTmofthetwoPCRprimersshouldbe:a)differby20℃b)thesameorveryclose c)differby30℃d)differby40℃.C)combinationofdUTPandUNG d)UVirradiationofPCRreagents 7 ﹒ Themostcommonmethodtopreventanon‐specificPCRre ......