Question

What are the four different types of DNA nucleotides?

Answer 1

Different types of DNA nucleotides:

1. Guanine, cytosine, adenine, and thymine are the four different nucleotide types that can be found in DNA.
2. They fall under the purine and pyrimidine categories of nitrogenous bases.
3. Cytosine and thymine are pyrimidines, while adenine and guanine are purines.
4. In the DNA polymer, these four bases couple together to form complementary pairings, with guanine exclusively pairing with cytosine and adenine pairing with thymine.
5. Cytosine and guanine make three hydrogen bonds, while adenine and thymine form two.
6. The three main components of a nucleotide in DNA are deoxyribose, a phosphate group, and one of the four nitrogenous bases.
7. The carbons of the five-carbon sugar deoxyribose join the phosphate group.
8. The nitrogenous bases are arranged in a ladder-like manner inside the DNA helix, which is made up of these two structures and is also known as the DNA backbone or two-strand helix.