Structure of DNA; drawing shows a chromosome, nucleosome, histone, gene, and nucleotide base pairs: guanine, cytosine, adenine, and thymine. Also shown is a cell and its nucleus.
Structure of DNA. Most DNA is found inside the nucleus of a cell, where it forms the chromosomes. Chromosomes have proteins called histones that bind to DNA. DNA has two strands that twist into the shape of a spiral ladder called a helix. DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands. Genes are short pieces of DNA that carry specific genetic information.
Cells or Tissue -- Normal Cells or Tissue
Science and Technology -- Genetics
|Type:||Color, Medical Illustration (JPEG format)|
|Source:||National Cancer Institute|
|Creator:||Terese Winslow (Illustrator)|
|Date Created:||January 26, 2015|
|Date Added:||May 18, 2015|
Yes - This image is copyright protected. Any use of this image is subject to prevailing copyright laws. U.S. Government has reuse rights. Please contact the rights holder of this image for permission requests.
Rights holder: Terese Winslow