Pdf methylene blue photoinactivation of rna viruses. Pdf cytoplasmic inhibition of carotenoid biosynthesis. The carotenoid biosynthetic pathway in higher plants was manipulated by using an rna viral vector. Positive stranded rna serves both as genomic and mrna for these viruses. The 5 may be naked, capped or covalently linked to. The rdrp and other proteins required for viral genome synthesis are often called the. Poliovirus virion rna functions as an mrna but does not have the. The rna genome is the template for synthesis of additional. The rna virus group can be subdivided based on the type of rna that. Genomic rnas then serve as templates for synthesis of complementary. Rna viruses replicate their genomes using virally encoded rnadependent rna polymerase rdrp. Biosynthesis of dna and rna viruses compared quizlet.