Question

T=A & C=G Why?
Why can these nitrogenous bases match with their own partner, but not others?

Answer 1

Hint: This is to do with complementary base pairing.

Cytosine can form 3 hydrogen bonds with Guanine
Adenine can form 2 hydrogen bonds with Thymine.
Or simply, C bonds with G and A bond with T. It's called complementary base pairing because each base can only bond with a specific base partner AND the structures complement each other (kinda similar to a lock and key).
C will only bond with G and A will only bond with T in DNA.

Answer 2

agreed :)

Answer 3

Thank you @butterflydreamer

Answer 4

you're welcomeeee :)))!