![DNA polymerases cannot initiate DNA synthesis - they can only add on to an existing strand of DNA … | Basic anatomy and physiology, Biology facts, Teaching biology DNA polymerases cannot initiate DNA synthesis - they can only add on to an existing strand of DNA … | Basic anatomy and physiology, Biology facts, Teaching biology](https://i.pinimg.com/originals/ab/3e/61/ab3e61d54c9aa45574e26b831b5e46fe.jpg)
DNA polymerases cannot initiate DNA synthesis - they can only add on to an existing strand of DNA … | Basic anatomy and physiology, Biology facts, Teaching biology
![There are four basic components required to initiate and propagate DNA synthesis. They are: substrates, template, primer and enzymes. There are four basic components required to initiate and propagate DNA synthesis. They are: substrates, template, primer and enzymes.](https://www2.csudh.edu/nsturm/CHEMXL153/GeneticsImages/DNASynthesis/DirectionalityDNARep.gif)
There are four basic components required to initiate and propagate DNA synthesis. They are: substrates, template, primer and enzymes.
![Primer-Independent DNA Synthesis by a Family B DNA Polymerase from Self-Replicating Mobile Genetic Elements - ScienceDirect Primer-Independent DNA Synthesis by a Family B DNA Polymerase from Self-Replicating Mobile Genetic Elements - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2211124717314869-fx1.jpg)