* DNA Base Pairing: In DNA, the bases pair up specifically:

* Adenine (A) pairs with Thymine (T)

* Guanine (G) pairs with Cytosine (C)

* Your Sequence: You provided the sequence "TCG GA".

* Complementary Strand: To find the complementary strand, pair each base with its counterpart:

* T pairs with A

* C pairs with G

* G pairs with C

* G pairs with C

* A pairs with T

* Result: The complementary DNA strand is AGC CT.