Respuesta :
TGCATGG because A pairs with T ( I remember with apples in the tree) and C pairs with G ( I remember this one with cars in the garage)
The answer is A. GGTGACT because C always pairs with G (I remember this as the lines are curved) and A always pairs with T (I remember this as all the lines are straight). So every time C pops up the complementary base pair is G and T with A.