There are so many examples for that in different areas, like biology experiment carried out in our lab recently.
Here's one linhttps://www.creative-biogene.com/support/Lentiviral-Vectors-the-Application-for-CAR-T-Therapies
k:
Answer is: each base can attch to only one other type of base
Bacteria reproduce by Binary Fission (also known as "Budding"), a simple process in which many prokatyoric organisms reproduce; it involves cell division after the replication of the nucleoid.
We have evidence from different studies all over the world