Chromosomes are cellular structures that contain the genetic material. A chromosome is comprised of a single DNA molecule that may be either circular or linear.

The chromosomes of sperm cells are tightly packaged into a complex of DNA and protamines. Converting the chromatin from a nucleohistone to a nucleoprotamine structure may serve both biophysical ...

State University of New York at Fredonia Department of Biology Professor William D. Brown, universally acclaimed by students ...

当“低精力”成为社交平台高频词，你是否也陷入过自我怀疑：这到底是懒，还是身体发出的求救信号？关键差异，藏在6字核心里——“ 有动力，没精力 ”才是低精力的真实写照，而“有精力，没动力”才是纯粹的懒。