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nagdy1

1. Which of the following statements is true about gene regulation in prokaryotes? (1 point) Promoters determine whether a gene is expressed. Expressed genes make more DNA. DNA-binding proteins determine whether a gene is expressed. RNA polymerase regulates gene expression 2. A lac repressor turns off the expression of the lac genes by (1 point) binding to the promoter. binding to DNA polymerase. binding to the operator. binding to the lac genes.

  • one year ago
  • one year ago

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  1. nagdy1
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    3. When E. coli is grown on glucose, and there is no lactose available (1 point) lactose molecules bind to the lac repressor. the lac repressor binds to the operator of the lac operon. RNA polymerase binds to the promoter of the lac operon. the lac genes are transcribed into messenger RNA. 4. What is the function of the operator in an operon? (1 point) Provide a site on the DNA where the repressor can bind and stop transcription. Provide a site on the DNA where RNA polymerase can bind to begin transcription. Code for the repressor protein. Code for the RNA polymerase protein.

    • one year ago
  2. DragonFall
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    Multiple Choice 1. Which of the following statements is true about gene regulation in prokaryotes? (1 point) (0 pts) Promoters determine whether a gene is expressed. (0 pts) Expressed genes make more DNA. (1 pt) DNA-binding proteins determine whether a gene is expressed. (0 pts) RNA polymerase regulates gene expression 1 /1 point 2. A lac repressor turns off the expression of the lac genes by (1 point) (0 pts) binding to the promoter. (0 pts) binding to DNA polymerase. (1 pt) binding to the operator. (0 pts) binding to the lac genes. 1 /1 point 3. When E. coli is grown on glucose, and there is no lactose available (1 point) (0 pts) lactose molecules bind to the lac repressor. (1 pt) the lac repressor binds to the operator of the lac operon. (0 pts) RNA polymerase binds to the promoter of the lac operon. (0 pts) the lac genes are transcribed into messenger RNA. 1 /1 point 4. What is the function of the operator in an operon? (1 point) (1 pt) Provide a site on the DNA where the repressor can bind and stop transcription. (0 pts) Provide a site on the DNA where RNA polymerase can bind to begin transcription. (0 pts) Code for the repressor protein. (0 pts) Code for the RNA polymerase protein. 1 /1 point The final score is 4/4 (100%).

    • one year ago
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