7 Circle all of the following that are inverted repeats in D

7. Circle all of the following that are ‘inverted repeats’ in DNA. (12 points) GAATTC AAATTT GACGAC GTCGAC CACACAC GGGCAT GGGCCC GGGTTT

Solution

Ans: The intervening sequence of nucleotides between the initial sequence and the reverse complement can be any length including zero. When the intervening length is zero, the composite sequence is a palindromic sequence.

GAATTC

AAATTT

GTCGAC

Initial sequence 5’GAATTC3’ –The complement is created y base pairing 3’CTTAAG5’ – The reverse complement is 5’GAATTC3’

AAATTT –TTTAAA-AAATTT

GTCGAC-CAGCTG-GTCGAC