Question

What nitrogenous bases are found in DNA?

Answer 1

DNA:

1. DNA is a polynucleotide.
2. Each nucleotide comprises deoxyribose sugar and a nitrogenous base with a phosphate bond.

Nitrogenous bases found in DNA:

1. Adenine (A), thymine (T), guanine (G), and cytosine (C).
2. Adenine and guanine are called purine bases.
3. Thymine and cytosine are called pyrimidine bases.
4. A pairs with T and G pairs with C by 2 and 3 hydrogen bonds, respectively.