Viruses Flashcards
Viruses are not generally considered to be
Alive
Not considered to be alive because cannot carry out all
Essential life processes by themselves
Life processes viruses cannot carry out by self (2)
Reproduction
Feeding
A virus is a packet of parasitic (2)
DNA
RNA
Viruses _ to replicate the viral gene
Take over the machinery of a cell
The process of taking over the cell causes a _ in the host
Disease
Viruses are not
Cells
Viruses do not have _ needed to carry out life processes
Cell structures
Viruses are comprised of genetic material (dna, rna) enclosed within a
Protective coat of proteins
Most viruses are tiny compared to a human cell and only _ times smaller
50
_ lock onto proteins on the surface of a host cell
Surface proteins
Surface proteins aka
Spike proteins
A single strand of rna or a double strand of _ contains viruses genetic material
Dna
_ make up the capsid
Capstones protein units
The viral genes carry the code for the _ and other viral proteins
Capsomer
The capsid is a protein shell that surrounds the
Genetic material
The outer envelope, present in most viruses is made up of (2)
Lipids
Proteins
- Virus locks onto host cell, targeting cells with receptors that match
It’s surface protein
- Viral envelope stays outside and injects
Genetic material and usually capsid
- Viral genes join
Hosts DNA
In some cases when joining DNA, viral DNA may copy itself using
Material from cell’s cytoplasm
In other cases when viral gene joins hosts dna, viral dna is added to
Cell’s genetic material
- Host cell divides and
Replicates dna
Viral dna _ when cell divides
Copied with host cell
The _ carries the virus with them
Daughter cells
- Host cell replicates
Viral genetic material
