In most cases, viruses are covered by a protein shell that encases the DNA. THis makes them impossibly small! Since that's all viruses are, they aren't technically alive (last time I checked) and are in a class all their own. They typically have a sort of injector apparatus that when latches onto cells injects the DNA into your own cell. When your cell finds DNA floating around it says "Hey! This should be in the nucleus" and brings it there, where it hijacks the cell into producing more viruses until the membrane ruptures and the viruses are set loose to the surrounding cells.
A retrovirus has an envelope with glycoproteins
Many viruses are composed entirely of DNA (or RNA) and protein. Some also have a fatty outer layer.
a typical virus
nonthing
a virus
Yes. All viruses are composed of a nucleic acid surrounded by a protein capsid. When the capsid is not present, the the infectious nucleic acid is called viroid. When the nucleic acid is not present, the infectious protein coating is called prion.
A virus particle is composed of a nucleic acid that is surrounded by the capsid (which is the protective layer that is made out of protein). Some viruses can have lipid envelope however, not all viruses have a lipid envelope.
Sulfur
A particle fitting your description may be a virus particle, which is made up of genetic material (DNA or RNA) enclosed by a protein capsid.
tissues
A typical virus is composed of a core of DNA or RNA surrounded by a protein coat.
virus
Virus
No - They are surrounded by a protein coat called the capsid
A protein coat called a capsid.
Yes. All viruses are composed of a nucleic acid surrounded by a protein capsid. When the capsid is not present, the the infectious nucleic acid is called viroid. When the nucleic acid is not present, the infectious protein coating is called prion.
a core of DNA or RNA surrounded by a protein coat
No. That is a virus.
a typical virus has a core of DNA or RNA and a protein coat
A Virus
If you mean what are viruses then they are nonliving strands Rna surrounded by a protein coat
A virus particle is composed of a nucleic acid that is surrounded by the capsid (which is the protective layer that is made out of protein). Some viruses can have lipid envelope however, not all viruses have a lipid envelope.