2) i beg your pardon of the following statements provides the most significant support for the idea that viruses room nonliving chemicals?

A) They space not written of cells.

You are watching: Which of the following statements about viral spikes is false

B) They room filterable.

C) They cannot reproduce themselves outside a host.

D) They reason diseases comparable to those led to by chemicals.

E) They are chemically simple.


3) which of the following statements around viral spikes is FALSE?

A) They space composed that carbohydrate-protein complexes.

B) castle are supplied for attachment.

C) they may cause hemagglutination.

D) They bind to receptors on the host cell surface.

E) they are found only ~ above nonenveloped viruses.


4) i beg your pardon of the complying with is NOT used as a criterion to classify viruses?

A) biochemical tests

B) morphology

C) main point acid

D) size

E) variety of capsomeres


5) i beg your pardon of the complying with is NOT used to culture viruses?

A) laboratory animals

B) culture media

C) embryonated eggs

D) animal cell cultures

E) bacterial cultures


6) Bacteriophages and animal viruses carry out NOT differ significantly in which among the complying with steps?

A) attachment

B) penetration

C) uncoating

D) biosynthesis

E) release


7) The definition of lysogeny is

A) phage DNA is integrated into host cell DNA.

B) lysis of the hold cell due to a phage.

C) the period during replication once virions are not present.

D) once the to explode time takes an unusually long time.

E) attachments of a phage come a cell.


8) A viroid is a(n)

A) complete, infectious virus particle.

B) transmittable piece of RNA without a capsid.

C) capsid without main point acid.

D) provirus.

E) transmittable protein.


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9) In figure 13.1, which framework is a facility virus?

A) a B) b C) c D) d E) every one of the structures are complicated viruses.
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10) The structures illustrated in number 13.1 room composed of

A) DNA.

B) RNA.

C) DNA or RNA.

D) Capsomeres.

E) viroids.


11) A clear area against a confluent "lawn" that bacteria is called a

A) phage.

B) pock.

C) cabinet lysis.

D) plaque.

E) rash.


12) continuous cell lines different from major cell present in that

A) viruses deserve to be get an impression in constant cell lines.

B) consistent cell lines always have to be re-isolated from pet tissues.

C) constant cell lines are acquired from major cell lines.

D) continuous cell lines deserve to be preserved through one indefinite number of generations.

E) consistent cell lines are from human being embryos.


13) i beg your pardon of the adhering to is vital for replication that a prion?

A) DNA

B) DNA polymerase

C) lysozyme

D) PrPSc

E) RNA


14) A persistent infection is one in which

A) the virus continues to be in equilibrium through the hold without leading to a disease.

B) famous replication is person who is abnormal slow.

C) the disease process occurs slowly over a lengthy period.

D) organize cells are slowly lysed.

E) hold cells are transformed.


15) which of the following statements is FALSE?

A) A prophage is phage DNA put into a bacterial chromosome.

B) A prophage deserve to "pop" the end of the chromosome.

C) Prophage genes room repressed by a repressor protein coded for by the prophage.

D) A prophage may result in new properties the the hold cell.

E) The prophage makes the hold cell immune to infection by other phages.


16) Lysogeny can result in every one of the adhering to EXCEPT

A) immune to reinfection by the same phage.

B) salvation of new characteristics through the host cell.

C) immunity to reinfection by any type of phage.

D) devoted transduction.

E) phage conversion.


17) which of the complying with would be the first step in biosynthesis of a virus through a - (minus) strand the RNA?

A) synthetic of DNA indigenous an RNA template

B) synthesis of double-stranded RNA from an RNA template

C) synthesis of double-stranded RNA native a DNA template

D) transcription of mRNA indigenous DNA

E) synthesis of DNA from a DNA template


18) An contagious protein is a

A) bacteriophage.

B) prion.

C) retrovirus.

D) viroid.

E) papovavirus.


19) one envelope is acquired during which of the complying with steps?

A) penetration

B) adsorption

C) uncoating

D) biosynthesis

E) release


20) which of the complying with statements is no true of lysogeny?

A) it can offer infected pathogens the genetic information for toxin production.

B) Prophage is inserted into the organize genome.

C) revolt cycle may follow lysogeny.

D) that is a "silent" infection; the virus does no replicate.

E) It causes lysis of host cells.


21) an example of a implicitly viral infection is

A) subacute sclerosing panencephalitis.

B) cold sores.

C) influenza.

D) smallpox.

E) mumps.


22) A virus"s capability to infect an pet cell depends generally upon the

A) hold cell"s capability to phagocytize viral particles. B) existence of receptor website on the cabinet membrane. C) form of viral main point acid. D) enzymatic activity of a organize cell. E) existence of pili on the organize cell wall.

23) i think you have isolated an unknown virus. This virus has a single, hopeful sense strand of RNA, and also possesses an envelope. Come which team does it most most likely belong?

A) herpesvirus

B) picornavirus

C) retrovirus

D) togavirus

E) papovavirus


24) The mechanism through which an covering virus pipeline a organize cell is called

A) transduction.

B) budding.

C) abduction.

D) lysogeny.

E) penetration.


25) The many conclusive proof that viruses reason cancers is provided by

A) detect oncogenes in viruses.

B) the visibility of antibodies versus viruses in cancer patients.

C) cancer adhering to injection the cell-free filtrates.

D) dealing with cancer through antibodies.

E) part liver cancer patients having had hepatitis.


26) Bacteriophages derive every one of the adhering to from the hold cell EXCEPT

A) lysozyme.

B) tRNA.

C) amino acids.

D) nucleotides.

E) ATP.


27) bacteriophage replication differs from pet virus replication since only bacter replication involves

A) adsorption to particular receptors.

B) assembly of famous components.

C) replication of viral main point acid.

D) injection that naked main point acid into the hold cell.

E) lysis that the host cell.


28) Generally, in one infection caused by a DNA-containing virus, the host animal cell supplies every one of the complying with EXCEPT

A) RNA polymerase.

B) nucleotides.

C) DNA polymerase.

D) tRNA.

E) none of the answers room correct; every one of these are supplied by the host pet cell.


29) which of the complying with places this items in the correct order for DNA-virus replication?

maturation DNA synthesis transcription Translation A) 1; 2; 3; 4 B) 2; 3; 4; 1 C) 3; 4; 1; 2 D) 4; 1; 2; 3 E) 4; 3; 2; 1

30) A viral varieties is a group of viruses that

A) has the exact same morphology and nucleic acid.

B) has actually the same hereditary information and also ecological niche.

C) infects the same cells and also cause the very same disease.

D) cannot be defined.


31) Viruses that use reverse transcriptase belong come the virus familiesA) Retroviridae and also Picornaviridae.B) Herpesviridae and also Retroviridae.C) Hepadnaviridae and also Retroviridae.D) Herpesviridae and Poxviridae.E) Rhabdoviridae and Herpesviridae.


32) DNA make from an RNA layout will be integrated into the virus capsid of

A) Retroviridae.

B) Herpesviridae.

C) Hepadnaviridae.

D) bacteriophage families.

E) influenzavirus.


33) which of the complying with statements around viruses is FALSE?

A) Viruses save DNA or RNA but never both.

B) Viruses save a protein coat.

C) Viruses use the anabolic machine of the cell.

D) Viruses use their own catabolic enzymes.

E) Viruses have actually genes.


34) A lytic virus has infected a patient. I m sorry of the adhering to would finest describe what is happening within the patient?

A) The virus is resulting in the fatality of the infected cell in the patient.

B) The virus is not killing any kind of cells in the host.

C) The virus is incorporating its nucleic acid through that the the patient"s cells.

D) The virus is gradually killing the patient"s cells.

E) The virus is infecting cells and also then releasing only little amounts the virus.


35) part viruses, such as human herpesvirus 1, infect a cabinet without leading to symptoms. These are called

A) implicit viruses.

B) revolt viruses.

C) phages.

D) slow viruses.

E) unconventional viruses.


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36) assume a patient had chickenpox (human herpesvirus 3) together a child. Which line on the graph in figure 13.2 would display the number of viruses current in this human as a 60-year-old through shingles (human herpesvirus 3)?

A) a

B) b

C) c

D) d

E) e


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37) i think a patient has influenza. During which time on the graph in number 13.2 would certainly the patient present the symptoms of the illness?

A) a

B) b

C) c

D) d

E) e


38) The adhering to steps occur during multiplication that herpesviruses. Which is the 3rd step?

A) attachment

B) biosynthesis

C) penetration

D) release

E) uncoating


39) The following steps occur throughout multiplication the retroviruses. I m sorry is the fourth step?

A) synthesis of double-stranded DNA

B) synthetic of +RNA

C) attachment

D) penetration

E) uncoating


40) Oncogenic viruses

A) cause acute infections.

B) are genetically unstable.

C) cause tumors come develop.

D) room lytic viruses that kill the host cell.

E) have actually no result on the hold cell.


41) Which among the following steps does no occur throughout multiplication that a picornavirus?

A) synthesis of + strands the RNA

B) synthesis of - strands the RNA

C) synthetic of viral proteins

D) synthesis of DNA

E) no one of the answer is correct.


42) i beg your pardon of the following is most likely a product of an early gene?

A) capsid proteins

B) DNA polymerase

C) envelope proteins

D) spike proteins

E) lysozyme


43) many RNA viruses bring which of the adhering to enzymes?

A) DNA-dependent DNA polymerase

B) lysozyme

C) RNA-dependent RNA polymerase

D) reverse transcriptase

E) ATP synthase


44) The complying with steps occur throughout biosynthesis of a + strand RNA virus. What is the third step?

A) attachment

B) penetration and also uncoating

C) synthetic of - strand RNA

D) synthesis of + strand RNA

E) synthesis of famous proteins


45) What contributes come antigenic change in influenza viruses?

A) an international distribution the the virus

B) a segmented genome

C) attachment spikes

D) lull of virus transmission

E) different virus subtypes


46) ________ were very first identified in cancer-causing viruses and can induce ________ in infected cells.

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A) Herpes viruses; lesions

B) Oncogenes; transformation

C) T antigens; lysis

D) Glycoprotein spikes; syncytia formation

E) Segmented genomes; reassortment


2) A viroid is a totally developed infectious agent composed of main point acid and also surrounded by a capsid.