Q. Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ ____ GAATTC ____ 3′ 3′ ____ CTTAAG ____ 5′
A) Palindromic sequence of base pairs
B) Replication completed
C) Deletion mutation
D) Start codon at the 5′ end
Explanation
[Solution from source] The sequence 5′-GAATTC-3′ reads the same on the opposite strand when both are read 5′→3′, so it is a palindromic sequence. This is the recognition site of EcoRI. Nothing in it indicates deletion or a start codon (AUG/ATG). Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.