1. A Phosphate Group: This is a negatively charged molecule that acts as the backbone of the DNA molecule.
2. A Deoxyribose Sugar: This is a five-carbon sugar that forms the structural core of the nucleotide.
3. A Nitrogenous Base: This is the part that carries the genetic information. There are four types of nitrogenous bases in DNA:
* Adenine (A)
* Guanine (G)
* Cytosine (C)
* Thymine (T)
Important Note: The base pairs in DNA are always complementary, meaning that adenine always pairs with thymine (A-T), and guanine always pairs with cytosine (G-C).
Summary:
A DNA nucleotide is a building block of DNA that consists of a phosphate group, a deoxyribose sugar, and one of four nitrogenous bases (adenine, guanine, cytosine, or thymine).
