Galen, the personal physician to Roman Emperor Marcus Aurelius, and his 22 thick volumes of medical treatises dominated medical practice for 1,300 years.
In many ways his legacy was disastrous for medicine because no one challenged his teachings.
The phosphate groups are yellow, the deoxyribonucleic sugars are orange, and the nitrogen bases are green, purple,pink, and blue.
DNA is in each cell in the organism and tells cells what proteins to make. The DNA in a person is a combination of the DNA from each of their parents.
Part of an organism's DNA is "non-coding DNA" sequences. Some noncoding DNA is transcribed into non-coding RNA molecules, such as transfer RNA, ribosomal RNA, and regulatory RNAs.
They have haunted our imaginations since history has began.
In legends and rituals, in monuments and stories, the dead are always there.