BIOL 112 Lecture Notes - Lecture 20: Plasmid, Hfr Cell, Glycoprotein

25 views1 pages

taupefish704

24 Mar 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

hans15149 and 39222 others unlocked

BIOL 112 Full Course Notes

Verified Note

27 documents

Document Summary

Dmitri ivanovsky and tobacco mosaic virus experiment. Viruses classiicaion: host speciicity and pathology, geneic material (viruses use a variety of geneic material: rna and dna, single or double stranded, circular or linear, size and shape (observed by electron microscopy) When retrovirus afects a cell, the retroviral rna transcripts into viral dna, then viral dna is translated to make parts of the new virus. Virus structure: glycoprotein envelope, lipid bilayer (usually animal viruses, nucleocapsid, viral rna genome, *virions (virus paricles that typically consist of a simple protein coat/capsid and nucleic acid) They can only turn on the genes that code for metabolic proteins that are needed depends on the environment.

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

C. Tissue culture method

D. Injection of virus into embryonated eggs

BIOL 112 Lecture Notes - Lecture 20: Plasmid, Hfr Cell, Glycoprotein

BIOL 112 Full Course Notes

Document Summary

Get access

Related Documents

BIOL 112 Lecture 20: Lecture 20 - Viral and Bacterial Genetics.pdf

BIOL 112 Lecture Notes - Lecture 20: Operon, Pilus, Hfr Cell

BIOL 112 Lecture Notes - Lecture 8: Tobacco Mosaic Virus, Dmitri Ivanovsky, Lysogenic Cycle

Related Questions