Final answer:
The types of bonds that hold nitrogen-containing bases together in DNA are hydrogen and covalent bonds.
Step-by-step explanation:
The types of bonds that hold nitrogen-containing bases together to make a DNA molecule are hydrogen bonds and covalent bonds.
Hydrogen bonds form between the nitrogenous bases of DNA. These bonds are relatively weak, but they are essential for the stability and structure of DNA.
Covalent bonds, on the other hand, connect the sugar-phosphate backbone of the DNA strand. These bonds are strong and stable, providing the overall structure of the DNA molecule.
Learn more about Types of bonds in DNA