genome, cells, size, structure of capsid, envelope
How are viruses are characterized
100
lack many necessary genes, lack ribosomes
What is the reason why viruses depend on a host for replication?
100
replicate in the nucleus
What are DNA viruses
100
Are on the outside of cytoplasmic membrane, these receive the virus
What is receptors
100
cytoplasmic membrane protein
What is PrP
200
naked and enveloped
What is the two types of viruses
200
make copies inside the host cell and then cause cell lysis
How do viruses use the host for replication?
200
replicate in the cytoplasm
What are RNA viruses
200
capsid lands on receptors and shoots viral genome straight in to cytoplasm.
What is Direct Penetration
200
Proteinaceous Infectious Particles
What are prions
300
Usually found in animal viruses, acquired from the host, only form of protection
What is a viral envelope
300
attachment, entry, synthesis, assembly, release
What are the 5 stages of replication?
300
can directly translate viral proteins; genome acts as mRNA
What is +ssRNA
300
Simplistic entry method for enveloped viruses
What is membrane fusion
300
ingestion, transplants, contact
What are the ways prions are transmitted
400
spikes seen on the outside of the viral envelope
What is glycoproteins
400
1. attachment of virus
2. entry of genome in to host cytoplasm
3. bacterial chromosome degraded
4. synthesis
5. assembly of viral proteins
6. release
What are the stages of lytic replication?
400
first undergoes transcription by RNA-dependent RNA transcriptase to create a complementary +ssRNA strand. The +ssRNA strand acts as a template for more transcription or for direct translation of viral proteins
What is -ssRNA
400
Enveloped Virus binds to receptor and the host membrane engulfs entire virus particle, creating a double membrane. Release from double membrane and capsid occurs in cytoplasm.
What is Endocytosis
400
sterilization doesn't kill it, no cure or treatment if you become infected
Why are prions so dangerous
500
covering and central core; capsid and nucleic acid
What is found in all viruses
500
1. attachment of virus
2. entry of genome in to host cytoplasm
3. prophage becomes part of host chromosome
4. replication of chromosome + virus; cell division
5. induction
6. synthesis
7. assembly of viral proteins
8. release
What are the stages of lysogenic cycle?
500
Unwinds to both +ssRNA and -ssRNA. The +ssRNA can translate to viral proteins while the -ssRNA undergoes further transcription to make complementary RNA strands.
What is dsRNA
500
Envelope of virus fuses with the cytoplasmic membrane of host. Capsid uncoats inside cell
What is membrane fusion
500
the enzyme that can destroy prions in a laboratory setting