In fact, the mere presence of a nucleus is considered one of the defining features of a eukaryotic cell. This structure is so important because it is the site at which the cell's DNA is housed and ...

additional DNA is found on one or more rings called plasmids. Eukaryotic cell DNA in a nucleus, plasmids are found in a few simple eukaryotic organisms. Prokaryotic cell DNA is a single molecule ...

During DNA replication, the unwinding of strands leaves a single strand vulnerable. How does the cell protect these strands from damage? How would you identify the protein that serves as a ...

This is exactly what scientists suspect happened to form a whole new type of cell ... rise of early eukaryotic cells, many researchers tell The Scientist it’s entirely possible that some questions ...