Question

The sequence of nucleotides in a single strand of DNA is shown. TGA -

GTG-AAT CAT. Which of the following represents the complementary
DNA strand?

Answer 1

Adenine always pairs with thymine and cytosine always pairs with guanine.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Answer: ACT - CAC - TTA - GTA

When it comes to DNA strands, certain bases can only match with one other base and not anymore.

So if we have an adenine (A) molecule, you can only expect thymine (T) to follow. And when you have a cytosine (C), you can only expect guanine (G) at the end of it.

So for the strand, TGA - GTG - AAT - CAT, the complementary strand on the other side of this one would be

ACT - CAC - TTA - GTA