Biology Questions and Answers
Viruses....................................................................................................................................
- Are viruses cellular beings?
Viruses are considered living beings but
they do not have cellular structure.
There is some controversy regarding
their classificatcharacteristics of self-reproduction ion as living beings. Theirand
of having genetic material horeinforce that classification. wever
- What is the basic structure
of a virus?
Viruses are constituted ofmaterial (DNA or RNA) covered by a genetic (^)
protein Some viruscapsule es, like HIV, have in additionalso known as a capsid. (^)
an external envelope derived from the
plasma membrane of the host cell fromwhich it came.
- Are there non-parasitic
viruses?
All viruses arparasites, i.e., they depend on the hoste obligate intracellular (^)
cell to does not have its own metabolism.complete their life cycle. A virus
- Why is it a strong
evolutionary hypothesis that
although viruses are the
structurally simplest beings
they were not the first living
beings?
The fact that viruses are obligate
intracellular the hypothesis that virparasites makes very us appearedweak
before cellular beings in the evolution of
life. - What is the genetic material
of a virus? How does that
material act in viral
reproduction?
There are DNA viruses (double strand or
single stran(double strand od DNA) anr single strand d RNA virusesRNA (^)
too). Viruses inoculate their DNA or RNA
molecules into means of transcription ocells and these cells (byr reverse
transcription proteins for the assemand translation)bling of a new synthesiz e
virus. This synthesis is commanded by
the viral DNA or RNA molecules.
- What is the typical
reproduction cycle of a DNA
virus?
A typical virus has proteins on its capsid
that bind to the outer membrane of thehost cell. In the place where the virus
adhered viral proteins act to break the
cell membrane and then the virus
http://www.biology-questions-and-answers.com