What is the shape of mumps virus?
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What is the shape of mumps virus?
The complete mumps virion has an irregular spherical shape, with a diameter ranging from 90 to 300 nm and averaging about 200 nm. The nucleocapsid is enclosed by an envelope that has three layers and is about 10 nm thick.
What is the shape of virus?
Most viruses have icosahedral or helical capsid structure, although a few have complex virion architecture. An icosahedron is a geometric shape with 20 sides, each composed of an equilateral triangle, and icosahedral viruses increase the number of structural units in each face to expand capsid size.
What are the 3 shapes of viruses?
Viruses are classified into four groups based on shape: filamentous, isometric (or icosahedral), enveloped, and head and tail.
What is the structure of the measles virus?
Measles virus (MV) is a member of the genus Morbillivirus of the family Paramyxoviridea. It is an enveloped, non-segmented, single-stranded, negative-sense RNA virus. Measles virions are seen as pleomorphic spheres with a diameter of 100–250 nm on electron microscopy.
Is mumps virus DNA or RNA?
Mumps virus is a 15.3-kb enveloped, nonsegmented, negative-strand RNA virus in the Paramyxoviridae family.
What is a filamentous virus?
Filamentous bacteriophage is a family of viruses (Inoviridae) that infect bacteria. The phages are named for their filamentous shape, a worm-like chain (long, thin and flexible, reminiscent of a length of cooked spaghetti), about 6 nm in diameter and about 1000-2000 nm long.
Viruses come in many shapes and sizes, but these are consistent and distinct for each viral family. In general, the shapes of viruses are classified into four groups: filamentous, isometric (or icosahedral), enveloped, and head and tail.
Is mumps RNA or DNA?
Mumps virus is a paramyxovirus in the same group as parainfluenza and Newcastle disease viruses, which produce antibodies that cross-react with mumps virus. The virus has a single-stranded RNA genome. The virus can be isolated or propagated in cultures of various human and monkey tissues and in embryonated eggs.
What is the shape of the measles virus capsid?
But unlike most viruses, which have rigid capsids, measles and its relatives rely on a relatively flexible helical container. “Conceptually, the capsids are helical, but in reality they are more like floppy springs,” Bhella says.
What is the name of mumps virus?
Mumps is an acute, self-limited, systemic viral illness characterized by the swelling of one or more of the salivary glands, typically the parotid glands. The illness is caused by the RNA virus, Rubulavirus. Rubulavirus is within the genus Paramyxovirus and is a member of the family Paramyxoviridae.