Quiz Ch6.

−viridae; −virus

In naming viruses, the family name ends with ________ and genus name ends with _________. -virus; virion −virion; virus −virus; −viridae −viridae; −virus

using antibodies to detect viral antigens (proteins)

Match the virus detection method of EIA to its proper description. using antibodies to detect viral antigens (proteins) making cDNA from RNA using primers to amplify DNA isolating antibodies from a patient, adding them to a virus, and seeing if the virus can clump erythrocytes

latency

Not all animal viruses undergo replication by the lytic cycle. There are viruses that are capable of remaining hidden or dormant inside the cell in a process called______________ . dormancy latency persistence transcriptase

A prion is a misfolded rogue form of a normal protein found in the cell. Virusoids require that the cell also be infected with a specific "helper" virus. The first viroid discovered was found to cause potato tuber spindle disease.

Which of the following are true regarding viroids, virusoids and prions? Viroids cannot replicate their genome in host cells. A prion is a misfolded rogue form of a normal protein found in the cell. Virusoids require that the cell also be infected with a specific "helper" virus. The first viroid discovered was found to cause potato tuber spindle disease.

spikes

The component(s) of a virus that is/are extended from the envelope for attachment is/are the: capsomeres viral whiskers spikes nucleic acid

membrane structures

The envelope of a virus is derived from the host's nucleic acids cytoplasm genome membrane structures

All of these

Which of the following statement are true regarding HeLa cells? (select all that are true) These HeLa cell lines allow scientists to culture and study viruses. They were used to develop the first continuous tissue-culture cell line. Viruses are facultative intracellular entities. HeLa cells were tumor cells isolated from Henrietta Lacks.

cytoplasm

With a few exceptions, RNA viruses that infect animal cells replicate in the_______________ . nucleus cytoplasm mitochondria ribosomes

viruses, host

Unlike bacteria, many of which can be grown on an artificial nutrient medium, ___________ require a living __________ cell for replication. viruses, endoparasitic animals, endoparasitic plants, ectoparasitic viruses, host

electron

Until the late 1930s and the advent of the _______________ microscope, no one had seen a virus. Yet treatments for preventing or curing viral infections were used and developed long before that. electron inverted compound light

naked

Viruses formed from only a nucleic acid and capsid are called ___________ viruses. prion enveloped bacteriophage naked

biotrophic

Viruses that infect plants are considered ______________ parasites, which means that they can establish an infection without killing the host. biotrophic hetermorphic pathogenic osmotic

All of these

Which of the following are characteristics of Viruses? Infectious, acellular pathogens All of these Obligate intracellular parasites with host and cell-type specificity Genome is surrounded by a protein capsid

bacteriophage

A virus that infects a bacterium is called a/an ___________________. bacteriophage eclipse prion viron

proteases

Although there are no current treatments for prion infections, which of the following could be used? proteases nucleases antibiotics sulfa drugs

viroid

An acellular entity composed of a small circular RNA molecule without a capsid and is not capable of replicating its genome is known as which of the following? virion virusoid viroid provirus

Henrietta Lacks

An example of an immortal cell line is the HeLa cell line, which was originally cultivated from tumor cells obtained from ________________ _________________, a patient who died of cervical cancer in 1951. Henrietta Lucas Harry Lacks Henrietta Lacks Henrietta Leeks

glycoproteins

The naked atadenovirus uses spikes made of _________________ from its capsid to bind to host cells. carbohydrates lipids none of these glycoproteins

biosynthesis

The third stage of a viral infection is _______________________ of new viral components. attachment maturation biosynthesis penetration

Transduction

____________________ occurs when a bacteriophage transfers bacterial DNA from one bacterium to another during sequential infections. Transference Translation Transduction Transitional