BIOL 1201 Lecture Notes - Lecture 22: Viral Envelope, Capsid, Glycoprotein

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cerisegiraffe538

20 Nov 2015

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Document Summary

Viruses: pages 381-390, concepts 19. 1 and 19. 2, we will do only the sections listed in the study guide from now on, structure. Infected cell synthesizes viral genome and protein (capsid: viral reproduction (lytic growth, synthesis of other viral components, assembly of viral particles, host cell lysis releases particles, viral reproduction (lysogenic growth) Can give you shingles. multiple mammals: reverse transcriptase: protein common in rna viruses. Immuno defense fends off virus: virus infects cells with certain cell surface protein (immuno defense cells, defense cells in lymph system are attacked and depleted over time, acquired immunodeficiency syndrome (aids) death by opportunistic infection. Comes from asis- because of combination of human, pig, and dog flu sequences: viral diseases. Emerging : hemorrhagic fever, hantavirus: production of viral symptoms, recovery from infection, release of hydrolytic enzymes, toxins by infected cells leads to cell death, regeneration of infected cells (flu respiratory epithelial cells; polio nerve cells)

Related Questions

QUESTION 1: The rabies virus primarily affects the nervous system. The specificity that the rabies virus has for neuronal host cells is primarily dictated by __________________________.

A. the helical shape of its viral capsid

B. the type of nucleic acid used for its viral genome (single-stranded, antisense RNA)

C. the spikes that protrude from its viral envelope

D. the segmented nature of its viral genome

QUESTION 2: Which of the following genome types has been observed in viruses? To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

A. Single-stranded RNA

B. Single-stranded DNA

C. Double-stranded RNA

D. Protein-based

QUESTION 3: Choose the correct statement about viral evolution.

A. RNA and DNA viral genomes evolve at equal rates.

B. Cellular genomes mutate at a faster rate than viral genomes due to their large size and increased chance of replicative mistakes.

C. DNA viruses mutate faster than RNA viruses because thymine is more susceptible to mutation than uracil.

D. RNA viruses mutate faster than DNA viruses due to a lack of proofreading replicative enzymes.

QUESTION 4: Your elderly patient is affected by shingles. After careful observation, you note that the virus responsible for the infection has an icosahedral capsid, is enveloped, and has double-stranded linear DNA as its genetic material. Based on this information, in which of the following viral families would you group this viral pathogen?

QUESTION 5: Which of the following is a key difference between lytic and lysogenic bacteriophage replication cycles?

A. Lysogenic bacteriophages release via host cell lysis, whereas lytic bacteriophages bud off from the host cell membrane.

B. The lytic replication cycle ends with host cell lysis and release of newly formed bacteriophage particles, whereas lysogenic replication leads to prophage formation.

C. Lytic replication requires an uncoating step, whereas in lysogenic replication, the bacteriophage's nucleic acid is directly injected into the host cell.

D. Whereas lytic replication enables the infection of several hosts, lysogenic replication only allows for infection of a single host cell.

QUESTION 6: Which of the following is an unsuitable culture method for an animal virus?

A. Direct inoculation of virus onto blood agar

B. Live animal inoculation