Write the letter of the correct term a single letter

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Write the letter of the correct term. A single letter is sufficient. Not all letters need be used, and a particular letter may be used more than once. Term List b. Positive control c. Negative control d. Inducible e. Noninducible f. Repressible g. Constitutive h. Operator i. Repressor 1. Phenotype with respect to β -galactosidase synthesis for the partial diploid I + O + Z + / I O C Z –– 2. Phenotype of I + O + Z / I + O C Z + 3. Phenotype of I + O + Z / I O C Z 4. Phenotype with respect to the synthesis of tryptophan enzymes in the trp operon trp R + O C S + ( trpR codes for repressor; S = structural gene) 5. Phenotype of trp R + O + S + in the presence of tryptophan 6. Regulatory molecule must be present at site in DNA (such as promoter) so that transcription occurs. 10. Type of operons responding to catabolite repression (glucose effect) 12. Regulatory molecule that binds to operator region in DNA Open-Ended Questions 1. What structural characteristic of an operon ensures that the genes contained in the operon will be coordinately controlled?
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Test Bank: Chapter Nineteen 2. Consider an E. coli cell with the following mutations. What effect would each mutation have on the function of the lac operon (assuming no glucose is present)? (a) A mutant lac operator that cannot bind repressor (b) A mutant lac repressor that cannot bind the lac operator (c) A mutant lac repressor that cannot bind to allolactose (d) A mutant lac promoter that cannot bind CAP plus cAMP 3. Positive and negative control are different ways of controlling the activity of a gene.
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