Your heart then pumps it through your body to provide oxygen to the cells of your tissues and organs. As the cells use the oxygen, carbon dioxide is produced and absorbed into the blood. Your blood then carries the carbon dioxide back to your lungs, where it is removed from the body when you exhale.
DNA polymerase has 5'-3' activity. All known DNA replication systems require a free 3' hydroxyl group before synthesis can be initiated (note: the DNA template is read in 3' to 5' direction whereas a new strand is synthesized in the 5' to 3' directionâthis is often confused).
DNA Polymerase delta (Pol delta), the main polymerase in DNA replication, can only travel in one direction of the ladder, while having to copy both anti-parallel strands. Its dilemma is that it can only read and copy strands in the tail-to-head (called 3â to 5â) direction.