VIRUSES CH. 26 Flashcards
After a virus has directed a host cell to produce new viral nucleic acid molecules and viral proteins, what is likely the next step?
Nucleic acid molecules and proteins self- assemble into new viruses
what is the name of the virus responsible for COVID- 19
SARS- CoV- 2
Which statement supports the argument that viruses are non living
- They have RNA rather than DNA
(2. they do not carry out metabolic processes) - their DNA does not encode proteins
- they do not evolve
some viruses have membrane envelopes… where do these originate from?
membranes from the host cell
what is the most affective way to stop viral infections?
Vaccines
The corona virus contains an outer membrane ( a viral envelope) that aids in the invasion of new host cells? Y or N
yes
what are capsids?
protein coat that surrounds the infected nucleic acids in some virus particles.
which of the following processes can viruses carry out/
they can use the hosts cell to copy themselves and make viral proteins.
viruses with envelopes and viruses without envelopes
viruses with envelopes have a phospholipid membrane outside their capsid, whereas viruses without envelopes don’t have a phospholipid membrane.
COVID- what uses a “key and lock” to invade a cell host
protein spike
what do we call a cell that attacks and invades bacterium?
bacteriophage
the protein shell around the viral nucleic acid is the …..
capsid
when sick with a viral infection, multiple symptoms may occur. which may be a reason for the onset of symptoms
- viruses may damage or kill a cell by controlling lysosomes.
- viral envelopes may be toxic
- results of the body’s own efforts to defend itself against infection
- virus may cause cells to produce toxins
the ________ are embedded in the viral envelope and aid in the assembly of new viral particles once it has infected a host cell
Envelope proteins
The__________ comprise of genome of he virus, thus enabling the production of other structural components of the virus.
RNA molecules
