Most molecularbiologists think that viruses originated from fragements cellularn

Question

Most molecularbiologists think that viruses originated from fragements cellularnucleic acid. Which of the following observations supports thistheory? A) Viruses can infect both prokaryotic and eukaryoticcells' B) Viruses can reproduce only inside host cells. C) Viruses are enclosed in protein capsids rather than plasmamembranes. D) Viruses contains either DNA or RNA. E) Viral genomes are usualy more similar to the genome of thehost cell than to the genomes of viruses that infect other celltypes. Most molecularbiologists think that viruses originated from fragements cellularnucleic acid. Which of the following observations supports thistheory? A) Viruses can infect both prokaryotic and eukaryoticcells' B) Viruses can reproduce only inside host cells. C) Viruses are enclosed in protein capsids rather than plasmamembranes. D) Viruses contains either DNA or RNA. E) Viral genomes are usualy more similar to the genome of thehost cell than to the genomes of viruses that infect other celltypes.

Explanation / Answer

E A viral genome usuallyhas more in common with the genome of its host than with those ofviruses infecting other hosts. Perhaps the earliestviruses were naked bits of nucleic acids that passed between cellsvia injured cell surfaces. The evolution of capsidgenes may have facilitated the infection of undamagedcells.

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