Biology Notes
~~notes from General Biology I for Science Majors~~ Transformed bacteria revealed the link between genes and DNA Genes - heritable information storage units Chromosomes - threadlike structures containing genes DNA is composed of four nucleotides Nucleotides of DNA are made of: -Phosphate group -Deoxyribose (sugar) - 1 nitrogen-containing base either: Adenine (A) Guanine (G) Thymine (T) Cytosine (C) The DNA of any species contains equal amounts of adenine and thymine and equal amounts of guanine and cytosine DNA is a double helix of two nucleotide strands Sugar-Phosphate Backbone - a major feature of DNA structure, formed by attaching the sugar of one nucleotide to the phosphate from the adjacent nucleotide in a DNA strand Hydrogen bonds between complementary bases hold the two DNA strands toget