AP_Bio_-_bacterial_genetics_questions - 13 What are...

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AP Biology: Chapter 18 Questions (Bacterial Genetics) 1) Describe how transformation, transduction, and conjugation differ. What very important similarity do all three processes share? 2) What is bacterial conjugation, and how does it occur? 3) What is an F factor? 4) Describe a plasmid. 5) What are “episomes”? Give two examples. 6) How does an F+ cell become an Hfr cell? 7) Compare and contrast conjugation between Hfr and F- cells to transduction. 8) What is an R-plasmid? Explain why they are significant to us. 9) Describe how an antibiotic resistance gene can move form one plasmid to another. 10) Why are the ends of a simple transposon (insertion sequences) “inverted repeats?” 11) Why are there always “direct repeats” flanking a transposon? 12) How do simple transposons affect the genome of a bacterium?
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Unformatted text preview: 13) What are composite transposons & what do they do for bacteria? 14) Why would it be beneficial for bacteria to turn genes and enzymes on & off? 15) What is a “transcription unit” & what are the advantages of having one? 16) What is an operator? Where is it, and how does it work? 17) Describe how the trp operon is repressible. 18) When are the trp genes turned on and off? 19) How is a corepressor similar to a coenzyme? 20) Why isn’t the lac operon normally active? 21) What activates the lac operon? 22) Why isn’t the lac operon “activated” by the presence of lactose in the environment? 23) What is a CRP & how does it affect the lac operon? 24) Why isn’t CRP specific to one operon like most repressor molecules?...
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