Bio 111 Ch.18 in-class questions

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The incorporation of tetracycline resistance genes that are picked up for outside the cell is an example of - -Natural competency -DNA uptake -Transformation -Horizontal gene transfer -All of the above

All of the above

You visit your neighborhood doctor after learning you have acquired swine flu. Despite your pleading she steadfastly refuses to prescribe a course of antibiotics. Why is she doing this? -Viruses are not alive -Viruses are unaffected by antibiotics -Overuse and misuse of antibiotics can lead to widespread resistance -All medication carry some risk of adverse side effects -All of the above are valid reasons

All of the above are valid reasons

A naturally competent bacterium can do the following: -Reproduce sexually -Bind and uptake DNA fragments -Form a sex pilus -Reproduce via genetic exchange with other bacteria -Resist antibiotics

Bind and uptake DNA fragments

Which of the following is found in all viruses? -DNA -RNA -Envelope -Capsid -Glycoproteins

Capsid

Viruses are - -Small living cells -Capable of homeostasis -Composed of proteins and nucleic acids -Capable of self-replication -None of the above

Composed of proteins and nucleic acids

Reverse transcriptase - -Is a viral enzymes -Copies RNA into DNA -Is found in the human immunodeficiency virus -Is critical for retroviral replication -All of the above

Copies RNA into DNA

If an F+ E. Coli is introduced into a colony of F- E. Coli, what would eventually happen? -Most of the bacteria would become antibiotic resistant -Most of the bacteria would contain only plasmids -Most of the bacteria could form a sex pilus -Most of the bacteria would become eukaryotic -Most of the bacteria would become highly virulen

Most of the bacteria could form a sex pilus

In addition to the circular chromosome bacteria often have small extrachromosomal rings of DNA called - -Plasmids -Endospores -Inclusions -Plastids -Helicase

Plasmids

AZT is a reverse transcriptase inhibitor, how does this drug prevent the replication of a retrovirus -Prevents the cutting and assembly of viral capsid proteins -Blocks the integration of viral genes into the host cell's genome -Prevents the copying of RNA into DNA -Blocks viral exocytosis from the host cell -Inhibits viral binding and uncoating

Prevents the copying of RNA into DNA

A self replicating protein that is not associated with any nucleic acids is a(n) - -Virus -Viroid -Prion -Prophage -Archeon

Prion

Bovine spongiform encephalitis is an incurable disease that is caused by a - -Virus -Viroid -Bacteria -Yeast -Prion

Prion

Integration occurs when - -The virus uncoats and enters a host cell -The virus binds to the surface of a host cell -The viral genes are incorporated into the host cell's genome -The viral genes direct the synthesis of viral polypeptides -The viral genes are packaged into newly constructed viral capsids

The viral genes are incorporated into the host cell's genome

During the lysogenic cycle viral particles are actively being manufactured and assembled. -This is true -This is false

This is false

Bacterial genes being transferred by a virus is termed - -Transformation -Conjugation -Transduction -Contamination -Transmutation

Transduction

A filter was used to separate 2 colonies of bacteria in a liquid growth medium. The filter's pores are too small to allow bacteria and viruses to cross but are large enough to allow DNA molecules to pass. Suction is applied and the bacteria on one side of the filter begin to acquire the traits of bacteria on the other side of the filter. What process is responsible for this? -Transformation -Conjugation -Mutation -Alternative splicing -Transduction

Transformation

A single naked loop of RNA containing a small number of genes is a(n) - -Virus -Viroid -Prion -Prophage -Archeon

Viroid

The serum of a sick mouse is passed through a filter with a pore size of 200 nm. After filtration the serum can still cause disease if injected into a healthy mouse, what is most likely the cause of the disease -Yeast -Bacteria -Achaea -Endospores -Viruses

Viruses


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