DNA replication is the process in which the double-stranded deoxyribonucleic acid. All cells in the human body undergo this process in order to create new cells. Both of the DNA strands carry the same information therefore they are both used in the process. The original DNA strands run complementary to and parallel to each other. Therefore only the leading strand can start replicating at 3’ while the other goes the opposite way since they are complementary.

DNA replication is semi conservative meaning that the new DNA has an old and new strand. The process involves large numbers of nucleoside triphosphates. A nucleoside triphosphate is not that much different from a nucleoside. The only difference is that instead of having only one phosphate molecule, it has three. There are also eight types of nucleoside triphosphates which are deoxyribose adenosine triphosphate, deoxyribose thymine triphosphate, deoxyribose cytosine triphosphate, deoxyribose guanine triphosphate, ribose adenosine triphosphate, ribose thymine triphosphate, ribose cytosine triphosphate, ribose guanine triphosphate.
Video demonstrating DNA replication - thanks to free science lectures on youtube.