DNA Structure: A-, B- and Z-DNA Helix Families

dna structure  DNA is composed of two chains of repeating nucleotides Each nucleotide consists of three components These components are: Phosphate Group; 2-deoxyribose sugar DNA is a double helical structure composed of nucleotides The two helices are joined together by hydrogen bonds The DNA also bears a sugar-phosphate backbone

DNA is the genetic material contained in the cells of living organisms It is stored in structures called chromosomes  A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits Each of these chains is known as a DNA chain, or a DNA

Chromosomes are structures that look like thread, which live in the nucleus of cells Chromosomes contain DNA and protein, and they DNA supercoiling describes a higher-order DNA structure The double-helical structure of DNA entails the interwinding of two complementary strands around one