A rod-like structure of tightly coiled DNA found in the cell nucleus of plants and animals. Chromosomes are normally found in pairs;human beings typically have 23 pairs of chromosomes.

Chromatin is found inside the nucleus of a cell, and is composed of proteins and DNA.  DNA makes up 40 percent of chromatin, while proteins make up the remaining 60 percent (Raven & Johnson,

To fit into the nucleus of a cell, DNA must be packed into folded structures called nucleosomes that in turn form higher order structures.

The technique, which offers a new way to study activities of many other proteins in general, and the new findings that clarify how DNA unwinds, ... Ha and colleagues studied the helicases found in E-coli.

Later he found a similar substance in the heads of salmon sperm cells. ... 1952: Hershey and Chase show that it is the DNA part of the T2 viral particle, not the protein part, that enters a host cell,

Problem(s): Where is DNA found in living organisms? What is DNA made of? What are nucleotides? What are the four nitrogenous bases found in DNA? Which bases pair together in a DNA molecule?

DNA has been found to have a bizarre ability to put itself together, even at a distance, ... How did the "one cell" in the beginning of evolution survived in extreme hash environment and reproduced?

Replication in eukaryotic cells must be coordinated with the stages of the cell cycle. DNA synthesis only occurs during S phase. ... When primary sequences were compared, little homloogy has been found.

A cell's ability to repair damage to its DNA is critical, and disrupting that repair function can lead to the development of cancer.

Scientists at the Weizmann Institute of Science recently discovered a new source of well-preserved ancient DNA in fossil bones. ... New life found in ancient tombs ... Stem Cell Research news