The Reverse transcriptase enzyme may use all the following as its substrates except________, and one may use ______ as the template for cDNA synthesis. dATP, dCTP, dTTP, dGTP/ any RNA ssRNA as the template/any RNA except tRNA and rRNA ssDNA as the template/ only mRNA DNA primers/synthetic RNA The Reverse transcriptase enzyme may use all the following as its substrates except________, and one may use ______ as the template for cDNA synthesis. dATP, dCTP, dTTP, dGTP/ any RNA ssRNA as the template/any RNA except tRNA and rRNA ssDNA as the template/ only mRNA DNA primers/synthetic RNA .