The Tobacco mosaic virus infects the leaves of tobacco plant.
It is transmitted into the host cell by some vector or other mechanical means such as rubbing or handling.
Once inside the host cell, the viral RNA takes control of the host cell metabolic machinery and directs it to synthesize its own proteins and replicate its RNA molecule.
All the raw materials needed for its replication and capsomer synthesis are obtained from the host cell.
Once sufficient viral particles are formed by self assembly, they are released from the host cell by lysis.
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Image: http://erec.ifas.ufl.edu/tomato-scouting-guide/images/diseases/tobacco-mosaic135.JPG
