A.Some viruses, such as tobacco mosaic virus,have a helical symmetry with the capsid surrounding an RNA genome. B.Many viruses that infect bacteria,such as the T-even bacteriophage, have a complex capsid with DNA contained within 1 the head structure
A.Some viruses, such as tobacco mosaic virus, have a helical symmetry with the capsid surrounding an RNA genome. B.Many viruses that infect bacteria, such as the T-even bacteriophage, have a complex capsid with DNA contained within the head structure
C.Some animal viruses. such as adenovirus,have isometric symmetry and a DNA genome. D.Others,such as coronavirus,have complex capsids and an envelope with protruding proteins surrounding an RNA genome
C.Some animal viruses, such as adenovirus, have isometric symmetry and a DNA genome. D.Others, such as coronavirus, have complex capsids and an envelope with protruding proteins surrounding an RNA genome
Helical viruses Helical viruses resemble long rods that may be rigid or flexible.Surrounding the nucleic acid,their capsid is a hollow cylinder with a helical structure.An example of a helical virus that is a rigid rod is the tobacco mosaic virus
Helical viruses resemble long rods that may be rigid or flexible. Surrounding the nucleic acid, their capsid is a hollow cylinder with a helical structure. An example of a helical virus that is a rigid rod is the tobacco mosaic virus. Helical viruses T117.gif
Polyhedral viruses The capsid of most polyhedral viruses is in the shape of a regular polyhedron with 20 triangular faces and 12 corners The capsomeres of each face form an equilateral triangle. An example of a polyhedral virus is the adenovirus. Another is the poliovirus
The capsid of most polyhedral viruses is in the shape of a regular polyhedron with 20 triangular faces and 12 corners. The capsomeres of each face form an equilateral triangle. An example of a polyhedral virus is the adenovirus. Another is the poliovirus. Polyhedral viruses
Enveloped viruses The capsid of viruses is covered by an envelope. Enveloped viruses are roughly spherical but variable in shape.When helical or polyhedral viruses are enclosed by envelopes,they are called enveloped helical and enveloped polyhedral viruses
The capsid of viruses is covered by an envelope. Enveloped viruses are roughly spherical but variable in shape. When helical or polyhedral viruses are enclosed by envelopes, they are called enveloped helical and enveloped polyhedral viruses. Enveloped viruses