Bio 111 Ch.18 in-class questions
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
