dna

• DNA, or deoxyribonucleic acid, is a double-stranded molecule that contains the genetic instructions used in the development and functioning of all known living organisms.
• Each nucleotide in the DNA molecule has three parts: a sugar, a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine).
• The nitrogenous bases in DNA are adenine, thymine, cytosine, and guanine.
• DNA is the genetic material that contains instructions for building an organism.
• Bases are attached to the sugars on one side of the backbone.
• Adenine and Thymine form two Hydrogen Bonds
• Each strand of DNA has a sugar-phosphate backbone with alternating sugars (deoxyribose) and phosphates.
• Cytosine and Guanine form three Hydrogen Bonds
• Hydrogen bonds hold the strands together
• The double helix structure allows for easy replication of DNA during cell division.
• The sequence of nucleotides determines the genetic information encoded by the DNA molecule.
• dna is located in the nucleus of all cells