Which of the following mutant lambda phages can still go through lytic life cycle - (select all correct answers) а. Q gene is deleted b. cl gene is deleted С. Gene N is deleted O d. cll gene is deleted
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- Some scientists are trying to engineer bacteriophageto treat bacterial infections in humans when theinfections do not respond to chemical antibiotics.a. What possible advantages might phage therapyhave over antibiotic therapy?Some scientists are trying to engineer bacteriophageto treat bacterial infections in humans when theinfections do not respond to chemical antibiotics.a. What possible advantages might phage therapyhave over antibiotic therapy?b. Describe potential difficulties that would need tobe overcome for phage therapy to succeed.c. How might researchers best confront the issue thatbacterial cells could become resistant to bacteriophage just as they could to antibiotics?Which of the statements about bacteriophage is FALSE: a) specialized transduction is a low frequency event b) may accidently package host DNA into a phage particle c) may perform specialized transduction d) only have a lytic life cycle
- Bacteriophages that can enter into stable, long-term rela-tionships with their hosts are called:(a) Lytic phages (d) Lazy phages(b) Defective phages (e) Temperate phages(c) Virulent phages1- which of the following can be used for treating/combating bacterial infections a. targeting spikes or attachment molecules b. phages c. reverse transcriptase inhibitors d. agent that turns ON gene expression e. agents that promote phage conversion 2- can DNA replication result in genetic change? explain asap pleaseThe contents of a plaque may not always contain a clonal population of phage if: a. Identical phages from a neighboring plaque diffuse into the original plaque b. The bacteria run out of resources too quickly and limit phage growth c. Different phages from a neighboring plaque diffuse into the original plaque d. All plaques on the plate originated from a pure phage culture
- A prophage replicates a. along with its host as long as the lytic genes are not being expressed b. along with its host as long as the lytic genes are being expressed c. independent of its host as long as the lytic genes are being expressed . d. independent of its host as long as the lytic genes are not being expressed .The major difference between retrotransposons and retroviruses isa. retrotransposons encode reverse transcriptase.b. retroviruses move from one site in the genome toanother.c. retroviruses encode the env gene, which allows themto move from one cell to another.d. None of the above are correct.Alfred Hershey and Martha Chase performed experiments to show that A: the genetic material was DNA contained in the bacteriophage, which entered bacteria during phage infection. B:the genetic material was RNA contained in the bacteriophage, which entered bacteria during phage infection C:the genetic material was protein contained in the bacteriophage, which entered bacteria during phage infection D:none of these choices are correctHomework question i am lost on
- In the lysogenic cycle of bacteriophages, which of the fol-lowing is true?(a) Lysogeny is the term applied to a temperate phage thatdoes not replicate itself independently and does not lysethe bacterial host cell.(b) Phage DNA is incorporated into the host bacterium’sDNA, at which time it is called a prophage.(c) Temperate phages can be replicated either as a pro-phage along with bacterial chromosomal replicationor can suddenly revert to the lytic cycle by replicatingthemselves and assembling into new phages.(d) All the above are true.(e) a and c only.Which of the following is true of Generalized transduction? O creates defective virions that are missing the entire phage genome phage and host DNA are both packed in the capsid by error Cha type of Hirgone transfer Frequency is I in 10¹ O occurs during the lysogenic cyclePhages that destroy host cell DNA, direct synthesis of phageparticles, and cause lysis of the host cell are called:(a) Temperate phages(b) Prophages(c) Lysogenic phages(d) Virulent phages(e) Transductions