What is polyhedral occlusion bodies?
Polyhedrins are a type of viral protein that form occlusion bodies (also called polyhedra), large structures that protect the virus particles from the outside environment for extended periods until they are ingested by susceptible insects.
Which of the following virus has polyhedral?
Adenovirus is an example of a polyhedral virus. These are non- enveloped viruses surrounded by a many- sided shell or capsid with an icosahedral nucleocapsid. This surrounds the double- stranded DNA genome.
What is the common polyhedral capsid shape of viruses?
b. Polyhedral viruses consist of nucleic acid surrounded by a polyhedral (many-sided) shell or capsid, usually in the form of an icosahedron (Figure 10.2.
What are the 3 basic types of viral shapes?
Virus particles come in a wide range of sizes and shapes. Viruses may also be classified according to the structure of the virus particle, or virion. The three major shapes seen are spherical, filamentous, and complex.
What are occlusion bodies in virus?
Occlusion bodies are protein lattices that protect infectious particles after release into the environment. This strategy is mostly used by insect viruses to keep long-term infectivity of tissues after the host death.
What are polyhedral viruses?
Polyhedral viruses: These are many-sided viruses. Their capsids can have different numbers of sides. Most polyhedral viruses have 20 triangular sides and 12 vertices (corners). The polyhedral virus shown in the picture below is the adenovirus.
What is an example of a polyhedral virus?
Adenovirus is an example of a polyhedral virus. Adenoviruses are nonenveloped viruses with an icosahedral nucleocapsid which surrounds the double-stranded DNA genome.
How many sides does a polyhedral virus have?
20 triangular sides
Most polyhedral viruses have 20 triangular sides and 12 vertices (corners).
What is a polyhedral cell?
polyhedral cell. a cell that is many-sided in form.
What is ribosomes and inclusion bodies?
Ribosomes are the site of protein synthesis. Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. The ribosomes of a polysome translate the mRNA into proteins. Inclusion bodies: Reserve material in prokaryotic cells are stored in the cytoplasm in the form of inclusion bodies.
What are polyhedral cells?
Cellular structures are found in many natural systems, including biological tissue, soap foams, and polycrystalline metals. The building blocks of these three-dimensional structures are three-dimensional polyhedra.
What is polyhedral virus give example?
Polyhedral viruses consist of nucleic acid surrounded by a polyhedral (many-sided) shell or capsid, usually in the form of an icosahedron. A virus disease may be defined as a disorder caused by an ultramicroscopic agent which cannot be propagated outside a living cell. Adenovirus is an example of a polyhedral virus.
What are the structures of virus?
Viral Structure. In the simpler viruses the virion consists of a single molecule of nucleic acid surrounded by a protein coat, the capsid; the capsid and its enclosed nucleic acid together constitute the nucleocapsid. In some of the more complex viruses the capsid surrounds a protein core (Fig.
Is adenovirus a polyhedral?
What is polyhedral structure?
In geometry, a polyhedron (plural polyhedra or polyhedrons; from Greek πολύ (poly-) ‘many’, and εδρον (-hedron) ‘base, seat’) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices. A convex polyhedron is the convex hull of finitely many points, not all on the same plane.