While RNA is built on the same backbone and structural concept as DNA (read this post for a refresher!), its slight biological differences lead to significant functional diversity. We’ll examine the structure of RNA molecules first, then dig more deeply into the myriad of functions performed by these molecules within (and even outside of!) the cell. Continue reading “RNA: An Introduction”
dsDNA: The double-stranded DNA molecule that needs to be copied! It contains specific sequences called origins of replication where the molecule can begin to be unwound and copied.
This is a really well-done short illustration of DNA replication! It doesn’t go into great detail about the various enzymes involved, or the intricacies of the process, but it covers all the basics very clearly.
Since DNA is the information database of the cell, it needs to make a copy of itself every time the cell replicates. If it were unable to do so, the newly formed cell (called a daughter cell) would have no DNA of its own to direct and regulate its function, and moreover would be unable to replicate itself. Continue reading “DNA Replication”
Like a king in his castle or a wizard in his tower, the DNA of a eukaryotic cell resides in a protected nucleus, responding to events and issuing commands from afar. But just what is it?