So basically the reason this is called an antisense because this has a complementary nucleotide sequence to this strand here. So this three to five strand is known as the antisense strand and our RNA polymerase uses the antisense strand to basically direct the synthesis of our RNA molecule and the other strand is known as the sens strand or the coating strand. So once again notice that just like DNA polymerase RNA polymerase can only read the DNA strand in the three to five direction and it can synthesize the RNA strand shown in green in the five to three direction. Now another important distinction that must be known between DNA polymerase and RNA polymerase is the following. DNA polymerase has the ability to basically correct any mismatches that are made with our base pairs. However, RNA does not have this proofreading mechanism and that means many more errors are actually formed during the process of transcription than the process of replication.