C)spectrophotometryalone d)spectrophotometryandgelelectroph 3 ﹒ ThequalityofaDNAisconsideredgood/OD280ratiois:a)2 ﹒ 5 b)3 ﹒ 0 c)1 ﹒ 8 d)2 ﹒ 0 4 ﹒ ThequalityofanRNAisconsideredgoo/OD280ratiois。 ......