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- 1. Multiple Choicewhat is an operon?a part of a ribsomea part of a Rnaa unit made up of linked genes that code for proteins needed to do a specific taskneeded for dna replication
- 2. Multiple ChoiceA protein that binds to the operator and blocks the RNA polymeraseregulatorrepressoractivatorcorepressor
- 3. Multiple ChoiceThe "on/off" switch for an operon is called thepromoterrepressoroperatorgene
- 4. Multiple ChoiceWhat is the name of the stretch of DNA where RNA polymerase binds?operatorpromoterenhancerorigin
- 5. Multiple ChoiceWhat is the role of operons in prokaryote gene expression?It makes the genes prokaryotes be turned onIt accounts for the regulation of gene activity in response to the needs of the cellsTo make DNA for the geneTo make the gene turn of and off
- 6. Multiple ChoiceThe lac operon genes only become expressed if:lactose binds to the repressorglucose binds to the repressorlactose binds to the operatorthe repressor binds to the operator
- 7. Multiple ChoiceIn the lac operon model the genes within the operon will be expressed if:lactose is absent in the cellglucose is present in the celllactose is present in the cell
- 8. Multiple ChoiceInducible negative control is when when the gene is transcribed by the ____ of a specific moleculepresenceabsence
- 9. Multiple ChoiceRepressible negative control is when when the gene is transcribed by the ____ of a specific moleculepresenceabsence
- 10. Multiple Choice
What type of operon is the trp (tryptophan) operon?induciblerepressiblepositive controlpromoible - 11. Multiple ChoiceOperons are found in the cells of which of the following types of organisms?prokaryotes (bacteria)eukaryotes (plant and animals)animals onlyviruses
- 12. Multiple Choice
What does the lactose do to the Operon?
Blocks transcription because of the energy it provides
Allows the repressor to unbind from the Operator.
The lactose binds the lactose and stops transcription
Allows for the transcription to speed
- 13. Multiple ChoiceFor a repressible operon to be transcribed, which of the following must be true?A corepressor must be present.RNA polymerase and the active repressor must be present.RNA polymerase must bind to the promoter, and the repressor must be inactive.RNA polymerase cannot be present, and the repressor must be inactive.
- 14. Multiple ChoiceMost gene regulation happens at which step along the way?translationtranscriptionsignal transductionDNA replication
- Answer choicesTagsAnswer choicesTags