Problem Set 10 Answers

Problem Set 10 Answers - (c)= constitutive(s)= uninducible...

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ANSWER SHEET 1. For each of the terms in the left column, choose the best matching phrase in the right column. __2___a. induction 1. Glucose prevents expression of catabolic operons __5___b. repressor 2. Stimulation of protein synthesis by a small molecule __4___c. operator 3. Group of genes transcribed into one mRNA __1__ d. catabolite repression 4. Site to which repressor binds __6___e. attenuation 5. Negative regulator __7___f. activator 6. Gene regulation involving premature termination of transcription __3___g. operon 7. Positive regulator 2 . Given below are a number of genetic combinations in the lac operon. For each one, give the level of the indicated enzymes produced. Use 1 (or low, L) for uninduced level and 100 (or high, H) for induced level. The superscripts used are:- (+) = wild type; (-) negative or mutant;
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Unformatted text preview: (c)= constitutive; (s)= uninducible. Enzyme Levels . β-galactosidase (Z) Permease (Y) . Uninduced Induced Uninduced Induced i- o + z + y-/i + o + z- y + 1 100 1 100 i + o c z + y-/i + o + z- y + 100 100 1 100 i s o + z + y-/i + o + z- y + 1 1 1 1 i s o + z + y-/i + o c z- y + 1 1 100 100 Genetics 380: Spring, 2011 Problem Set # 10 Ch. 11 3 . Write the partial genotype for a strain that will-(a) produce β-galactosidase constitutively and permease inducibly. i + o c z + y-/F’i + o + z- y + (b) produce β-galactosidase constitutively but no permease (neither constitutively nor inducibly even though a y + (wild type permease) gene is known to be present. i s o c z + y-/F’ i + o + z- y +...
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Problem Set 10 Answers - (c)= constitutive(s)= uninducible...

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