Why are prokaryotes able to replicate so much more quickly than eukaryotes? (Hint: What cellular components must be copied before a cell splits in two?) Why is this difference in replication rate an important part of our vulnerability to bacterial pathogens?

In a P1 transduction experiment, the P1 lysate contains phages thatcarry pieces of the host chromosomal DNA, but the lysate also containsbroken pieces of chromosomal DNA. If a P1 lysate is used to transfer chromosomal DNA to another bacterium, how could you show experimentally that the recombinant bacterium has been transduced (i.e., has taken up a P1 phage with a piece of chromosomal DNA inside) versus transformed (i.e., has taken up a piece of chromosomal DNA that is not within a P1 phage coat)?

How does recombination in bacteria differ from recombination in eukaryotes? 1) Recombination does not occur in prokaryotes  2) Only the plasmid DNA goes through recombination in prokaryotes  3) Sister chromatids, not homologous chromosomes, exchange information during recombination in prokaryotes  4) A portion of DNA from genome is replaced with homologous DNA from another strain of bacteria.

A particular animal virus requires the use of DNA polymerase from its host, since it does not possess its own DNA polymerase enzyme. Which of the following assumptions in A-D would likely be correct regarding this virus? A) O This virus could not be a retrovirus type. B) OIt could be a (-) ss RNA virus. C) O It could be a (+) ss RNA virus. D) O The vVirus life cycle very likely includes going to the host cell nucleus. E) O All ofA-D are correct assumptions.

Does bacterial transformation occur in nature?

Describe the four phases of bacterial cell division. Where would horizontal gene transfer occur? Where would sporogenesis occur? If antibiotics generally target cells which are growing and dividing as fast as they can, when would antibiotics be most effective? If a culture had 4 cells to begin with and has a generation time of 60 minutes, how long would it take to get 1,048,576 cells?

Some retroviruses that have a wide host range have been developed for use in treatment of diseases or syndromes. These viruses do not result in a productive infection because they lack critical genes for viral replication, but they do carry DNA sequences that allow them to be packaged into infectious particles. Once in the host cell the viral DNA is released and integrates into the cell's genome. The advantage to this strategy is that the delivery of the DNA is very efficient. What is one possible problem of using a virus that can integrate into the human nuclear genome? Multiple Choice The virus carries genes that will interfere with host cell activities. The viral DNA sequences could still cause a disease. Since the viral DNA sequences no longer contain essential genes for viral replication the host cell may not be able to replicate either. The integration could disrupt an essential gene or genes.

What does a bacteriophage accomplish with lysogeny? O 1) it allows the bacteriophage to destroy the host cell's DNA. 2) it enables the bacteriophage to take over the cell. O 3) it speeds up the viral infection cycle. 4) it allows the bacteriophage to infect cells it would not normally infect. O 5) the genetic material of the bacteriophage can be passed on to future generations of infected cells.

16) Bacterial DNA replication is said to be: a) Linear b) curvilinear c) circular d) exponential e) hyperbolic 17) Cytokinesis in bacteria takes place through a process called: a) Cleavage b) septation c) cell plate formation d) molting e) cytolysis 18) The time in minutes at a specific temperature needed to kill a population of cells or spores is called: a) Z value b) K value c) Q10 d) D value e) F value19) If patients are allergic to penicillin, then you prescribe __ as an alternative: a) Tetracycline b) Cephalosporin c) Erythromycin d) Sulfonamides e) Fluoroquinolones 20) Biological control of Salmonella is by using: a) E. Coli (ETEC Strain) b) Shigella c) Bdellovibrio d) Plasmodium e) Spirillum

A bacterium undergoes four rounds of replication. How many cells would result, and how many of those cells would still have part of an original DNA strand from the starting bacterium?