In 35 cycle at 94degree C, 54degree C and 72 degree C by mistake in place of 54 degree I did 5.4 degree C and it ran for almost 25 cycle. Can i restart the PCR and what will happen if i did?
You can restart the pcr and the taq will be fine so you should get your expected bands. Unfortunately the low annealing temperature will allow the primers to anneal all over the genome so the pcr will be messy with additional bands. If all you want is a band of the right size to show the existence of a product then it may work ok but dirty but generally I would start again