A biology problem by Emmanuel Effiong
Biology
Level
2
A DNA strand with the sequence 5' CGA TTG 3' which of the following would be complementary to the sequence
(5' CAA TCG 3')
(5' CUU TCG 3')
(5' GCT AAC 3')
(5' GCU AAC 3')
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1 solution
Using Chargaff's rule. On the complementary strand, we would have the sequence 3' GCT AAC 5' . But this is not fully complementary(3'>5'). To make it complementary, we inverse it and write 5' CAA TCG 3'. This the answer.