Which of the following best describes a polymerase?
It is an enzyme that catalyzes the formation of nucleic acid
It is an enzyme that blocks the formation of nucleic acids.
It's ribosome that catalyzes the formation of nucleic acid
It is an enzyme that slows the formation of DNA.
Which of the following statements about DNA viruses that affect humans is FALSE?
They replicate in the nucleus.
They use the host's enzymes to replicate.
They are single-stranded.
They use the host cell's internal machinery to replicate.
The process whereby DNA is converted into mRNA is known as:
Latency
Transcription
Replication
Translation
Why are ribosomes important in the replication of DNA viruses?
They produce lipids.
They synthesize carbohydrates.
They produce proteins.
They produce dsDNA.
During the process of viral replication _____.
nothing happens with the viral genome
the virus uses the host cell to copy the viral genoome
viral RNA is always transformed into viral DNA
the virus copies the genetic material of the host cell
Which of the following refers to the process by which viruses are expelled out of their host cell?
Maturation
Attachment
The lytic cycle
Viral shedding
Which of the following is NOT a method of viral release?
Cell bursting
Exocytosis
Budding
Injection
The process in which two viruses mix and match parts of their genome is called _____.
genetic deviation
antigenic shift
genetic diversity
genetic reassortment
Which of the following is TRUE about antigenic drift?
It causes major changes in the flu virus.
It results in the genome reasserting.
It causes minor changes in the flu virus.
It does not cause any changes in the flu virus.
Which of the following are present in ALL virions?
Nucleic acids, capsomeres, capsid, protomers
RNA, capsomeres, capsid, protomers, envelope
Ribosomes, nucleic acids, capsid, protomers
Capsomeres, nucleic acids, ribosomes, protomers, envelope
A virus that infects a bacteria is known as a(n):
Eukaryophage
Bacteriophage
Bacteriovirus
Prokayrophage
Which of the following is the best definition of a virion?
An infective virus outside of a host
An inert virus outside of a host
A virus which has infected a bacteria
An inert virus inside of a host
What is the function of a viral envelope?
It replaces the capsid.
It increases infectivity of the virus.
It allows the host to recognise the virus.
It helps the virus attach to the host.
RNA viruses replicate in the:
Cytoplasm
Mitochondrion
Endoplasmic reticulum
Nucleus
DNA viruses replicate in the:
Mitochondrion
Nucleus
Cytoplasm
Endoplasmic reticulum
A scientist identifies a strand of RNA that can be used directly to code for important viral proteins during viral replication. What have they found?
RNA major
RNA minor
-RNA
+RNA
