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5. If you haven't washed your hands for a while, they may be covered in bacteria (which is completely normal, mostly). Those bacteria will be making all the amino acids they need to live and grow happily. Now, if you go grab a turkey leg and those bacteria find themselves on a new resource rich in the amino acid tryptophan, they really don't need to keep making that amino acid (they just use the tryptophan from the turkey instead). a. Tryptophan synthesis uses enzymes from the trp operon in bacteria. Would you expect the trp operon to be inducible or repressible? Explain your reasoning. b. What role does tryptophan play in regulating the trp operon? What does it do, exactly, to reduce gene expression in this case? c. Briefly explain what needs to happen for the trp operon to return to its original "on" state (being transcribed).

5. If you haven't washed your hands for a while, they may be covered in bacteria (which is completely normal, mostly). Those bacteria will be making all the amino acids they need to live and grow happily. Now, if you go grab a turkey leg and those bacteria find themselves on a new resource rich in the amino acid tryptophan, they really don't need to keep making that amino acid (they just use the tryptophan from the turkey instead). a. Tryptophan synthesis uses enzymes from the trp operon in bacteria. Would you expect the trp operon to be inducible or repressible? Explain your reasoning. b. What role does tryptophan play in regulating the trp operon? What does it do, exactly, to reduce gene expression in this case? c. Briefly explain what needs to happen for the trp operon to return to its original "on" state (being transcribed).

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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5. If you haven't washed your hands for a while, they may be covered in bacteria (which is completely normal, mostly). Those bacteria will be making all the amino acids they need to live and grow happily. Now, if you go grab a turkey leg and those bacteria find themselves on a new resource rich in the amino acid tryptophan, they really don't need to keep making that amino acid (they just use the tryptophan from the turkey instead). a. Tryptophan synthesis uses enzymes from the trp operon in bacteria. Would you expect the trp operon to be inducible or repressible? Explain your reasoning. b. What role does tryptophan play in regulating the trp operon? What does it do, exactly, to reduce gene expression in this case? c. Briefly explain what needs to happen for the trp operon to return to its original "on" state (being transcribed).
Transcribed Image Text:5. If you haven't washed your hands for a while, they may be covered in bacteria (which is completely normal, mostly). Those bacteria will be making all the amino acids they need to live and grow happily. Now, if you go grab a turkey leg and those bacteria find themselves on a new resource rich in the amino acid tryptophan, they really don't need to keep making that amino acid (they just use the tryptophan from the turkey instead). a. Tryptophan synthesis uses enzymes from the trp operon in bacteria. Would you expect the trp operon to be inducible or repressible? Explain your reasoning. b. What role does tryptophan play in regulating the trp operon? What does it do, exactly, to reduce gene expression in this case? c. Briefly explain what needs to happen for the trp operon to return to its original "on" state (being transcribed).
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