Question

A strand of DNA has the bases AGTAAC. Using letters, show the matching DNA strand.

Answer 1

The matching DNA strand would be A - T, G - C, A -T, A - T, C - G, or in other words TCTTG (because you had the strand AGTAAC). 

Always remember that A pairs with T, G pairs with C, T obviously pairs with A, and C obviously with G.