- Via intermolecular forces
- Hydrogen bonding
Take a look at the wonderful image just below.
This image shows you the nitrogenous bases that are purines and pyrimidines. The
Purines base pair with pyrimidines. This means A pairs with T and G pairs with C. They pair by forming Hydrogen bonds, a type of intermolecular bond and one of the strongest types of intermolecular bonds out there. This type of bond is different from an intramolecular bond which exists between atoms within the molecule itself.
Hydrogen bonds only occur between