Is reoviridae positive-sense?

Viruses in the family Reoviridae have genomes consisting of segmented, double-stranded RNA (dsRNA). Because of this, replication occurs exclusively in the cytoplasm, and the virus encodes several proteins which are needed for replication and conversion of the dsRNA genome into positive-sense RNAs.

Is reovirus negative-sense?

Reovirus Replication Cycle. ; negative-sense strands are used as templates for positive-sense strands. These (+) sense strands serve as late mRNAs and as templates for (-) sense strand synthesis. The capsid is assembled and the particles are released.

What causes reoviridae?

Reovirus. Reovirus is a nonenveloped double-stranded RNA virus. This virus was initially not known to be related to any specific disease, and so was named Respiratory Enteric Orphan virus. However, some members of the reovirus family have been shown to cause mild illnesses such as diarrhea [5,30].

Which of the following are unique characteristics of reoviruses?

Important features of the orthoreoviruses (or “reoviruses”) include a diameter of 70 nm; a double capsid; ether and acid stability; a genome of 10 segments of double-stranded RNA; three serotypes designated types 1, 2, and 3; and the ability to infect humans as well as various other animals.

What is the shape of pox virus?

Poxviruses are brick or oval-shaped viruses with large double-stranded DNA genomes. Poxviruses exist throughout the world and cause disease in humans and many other types of animals. Poxvirus infections typically result in the formation of lesions, skin nodules, or disseminated rash.

Are retroviruses positive or negative sense?

The retroviral RNA molecules are positive sense in polarity, equivalent to mRNA. During reverse transcription, the first strand of DNA synthesized is minus in polarity since it is synthesized from the positive-sense RNA molecule, which is used as the template.

Is Covid 19 positive or negative sense?

Coronavirus infection, like many other positive-sense RNA viruses, manifests in the generation of ER-derived and interconnected perinuclear double-membrane structures such as double-membrane vesicles (DMVs), convoluted membranes and the recently discovered double-membrane spherules112,114,115,116.

What is an example of a retrovirus in humans?

The retrovirus known as human immunodeficiency virus (HIV) causes acquired immunodeficiency syndrome (AIDS) in humans.

What are the characteristics of the family Reoviridae?

Members of the family Reoviridae have segmented, dsRNA genomes. The number of genome segments ranges from 9 to 12. Reovirus replication is cytoplasmic and a unique feature of these viruses is that transcription takes place from within capsids. Virions are unenveloped, with two or three capsid layers (double or triple layer capsids).

What kind of RNA does a reovirus have?

Originally, reoviruses were classified as echoviruses, in the family Picornaviridae. (source: Wong ) The reovirus genome is monomeric and consists of ten to twelve segments (depending on the genus) of linear, double-stranded RNA.

How are reoviruses transmitted from insect to plant?

Most of the plant-infecting reoviruses are transmitted between plants by insect vectors. The viruses replicate in both the plant and the insect, generally causing disease in the plant, but little or no harm to the infected insect.

Where does replication take place in a Reoviridae virus?

Viruses in the family Reoviridae have genomes consisting of segmented, double-stranded RNA (dsRNA). Because of this, replication occurs exclusively in the cytoplasm and the virus encodes several proteins which are needed for replication and conversion of the dsRNA genome into (+)-RNAs.