Exemplar Problems
Question:
If the sequence of one strand of DNA is written as follows:
5’ -ATGCATGCATGCATGCATGCATGCATGC-3'
Answer:
To find the sequence of the complementary strand in the 5’→3’ direction, we pair the bases:
A (Adenine) pairs with T (Thymine)
T (Thymine) pairs with A (Adenine)
G (Guanine) pairs with C (Cytosine)
C (Cytosine) pairs with G (Guanine)
The complementary strand is:
3’ -TACGTACGTACGTACGTACGTACGTACG-5'