What type of viruses contain reverse transcriptase?

Reverse transcriptase is an RNA-dependent DNA polymerase that was discovered in many retroviruses such as human immunodeficiency virus (HIV) and avian myeloblastosis virus (AMV) in 1970.

Do all retroviruses have reverse transcriptase?

All members of Group VI use virally encoded reverse transcriptase, an RNA-dependent DNA polymerase, to produce DNA from the initial virion RNA genome. This DNA is often integrated into the host genome, as in the case of retroviruses and pseudoviruses, where it is replicated and transcribed by the host.

Is poliovirus enveloped or Nonenveloped?

Poliovirus, the causative agent of paralytic poliomyelitis, is a small non-enveloped virus, with a single strand RNA genome encased in an icosahedral protein capsid.

How do enveloped viruses differ from Nonenveloped viruses?

These differences reflect different mechanisms of cell entry and different pathways of assembly and maturation. Enveloped viruses enter by membrane fusion, either from an internal compartment following an endocytic step, or at the cell surface. Non-enveloped viruses require some form of membrane “perforation”.

Where does an enveloped virus synthesizes its proteins?

The endoplasmic reticulum–Golgi–plasma membrane system of a cell. All viral and cellular integral membrane proteins are synthesized by ribosomes bound to the endoplasmic reticulum membrane.

Which virus directed reverse transcriptase enzyme is inhibited by?

HIV
NRTIs inhibit the HIV reverse transcriptase enzyme, which is responsible for the reverse transcription of viral RNA into DNA.

Is the flu enveloped?

1.1 Characteristics of Influenza Viruses. Influenza viruses are members of the family Orthomyxoviridae. This family represents enveloped viruses the genome of which consists of segmented negative-sense single-strand RNA segments.

Are all helical viruses enveloped?

All helical animal viruses are enveloped. Helical capsid proteins wind around the viral nucleic acid to form the nucleocapsid. A helix is mathematically defined by amplitude and pitch. An icosahedron is a geometric shape with 20 sides, each composed of an equilateral triangle.

Which of the following viruses consists of a helical nucleocapsid?

The coronaviruses also have helical nucleocapsids, but being plus-strand RNA viruses they do not need to carry enzymes in the virion to initiate infection.