Write the complimentary DNA strand

A-C-T-C-G-G-T-A-A

T-G-A-G-C-C-A-T-T

Explanation:

In DNA, the bases pair like this:

A with T and C with G

So, for this strand:

A-C-T-C-G-G-T-A-A,

the complementary DNA strand would be:

T-G-A-G-C-C-A-T-T