Question

One strand of DNA contains the fragment CATTGCATAAGC. What would be the complementary strand to this fragment?

Answer 1

The complementary DNA strand to the sequence CATTGCATAAGC is GTAAACGTATTC, following the base pairing rules and writing in the opposite direction.

Step-by-step explanation:

If one strand of DNA contains the fragment CATTGCATAAGC, the complementary strand will be the one where each nucleotide is paired with its complement according to the base pairing rules in DNA. Adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). Therefore, the complementary DNA strand to the given sequence would be GTAACGTATT. It is important to remember that DNA strands are antiparallel, which means that if the original strand is 5' to 3', the complementary strand will be written from 3' to 5'.

Steps to Determine the Complementary DNA Strand:

1. Identify the original DNA sequence.
2. Apply the base pairing rules: A pairs with T, and C pairs with G.
3. Write the complementary bases in the opposite direction to the original strand (5' to 3' becomes 3' to 5').

So for the sequence CATTGCATAAGC, the complementary sequence would be GTAAACGTATTC.

Answer 2

GUAACGUAUUCG