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Biology
11th -
12thgrade
AP - Unit 6: Regulation of Gene Expression
30 questions
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- 1. Multiple ChoiceOperons are found in the cells of which of the following types of organisms?prokaryotes (bacteria)eukaryotes (plant and animals)animals onlyviruses
- 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 ChoiceAn operon consists of all the the following EXCEPToperatorpromoterregulatory genegenes of the operon
- 6. Multiple Choice
The lactase genes only become expressed if:
lactose binds to the repressorlactose unbinds with the repressor
- 7. Multiple Choice
In the lac operon, the genes within the operon will be expressed if:
lactose is absent in the celllactose is present in the cell - 8. Multiple ChoiceThe parts of a gene that do NOT code for amino acids in a protein are calledintronsexonscodonsanticodons
- 9. Multiple Choice
A chemical modification of DNA that makes that gene less likely to be expressed.
methylationacetylation - 10. Multiple ChoiceMost gene regulation happens at which step along the way?translationtranscriptionsignal transductionDNA replication
- 11. Multiple ChoiceA type of substitution in which one amino acid changes is calledNonsenseMissenseSilentall of the above
- 12. Multiple ChoiceThis type of substitution codes for a stop codonMissenseNonsenseSilentDeletion
- 13. Multiple ChoiceA type of substitution in which no amino acids change is calledMissenseNonsenseSilentDeletion
- 14. Multiple ChoiceAre all mutations bad?YesNo
- 15. Multiple ChoiceRNA interference means short RNA sequences bind to ___ and prevent their translation.mRNAtRNArRNAribosomes
- 16. Multiple ChoiceWhat is an exon?section of mRNA that codes for proteinsection of mRNA that does not code for proteinsection of tRNA that codes for proteinsection of rRNA that codes for protein
- 17. Multiple ChoiceA major role is played by-----what in RNA interference that regulates human growth/development?Complementary RNA basestRNAmRNAmiRNA/small RNA molecules
- 18. Multiple Choice
What occurs during histone acetylation?
chromatin becomes less tightly packed, allowing for transcription to occur
chromatin becomes more tightly packed, restricting RNA polymerase from binding for transcription
- 19. Multiple ChoiceInheritance of traits by mechanisms not directly involving nucleotide sequence is calledepigenetic inheritancedifferential gene expressionchromosomal inheritancegene regulation
- 20. Multiple ChoiceIn eukaryotes, proteins that help the RNA polymerase bind to the promoter for transcriptiontranscription factorstopoisomeraseregulatory genesactivators
- 21. Multiple Choice
What's going on in this image?
Alternative Splicing
Operon Modeling
Chromosome Modification
RNA interference
- 22. Multiple Choice
What molecule tags proteins, that are in excess or are not needed by the cell, for degradation?
Ubiquitin
Methyl
Acetyl
mtDNA
Phosphate groups
- 23. Multiple Choice
What eukaryotic gene control is being represented in the image?
Transcriptional control
Processing control
mRNA stability control
Translational control
Post translational control
- 24. Multiple Choice
What eukaryotic gene control is being represented in the image?
Transcriptional control
Processing control
mRNA stability control
Translational control
Post translational control
- 25. Multiple Choice
The "lifespan" of an mRNA molecule refers to which regulation of eukaryotic gene expression?
Transcriptional
Translational
Post-Translational
Post-Transcriptional
Chromosome Structure
- 26. Multiple Choice
The ________ is a protein that attaches to the enhancer sequence on the DNA that initiates Transcription.
Activator
Repressor
- 27. Multiple ChoiceProtein molecules around which DNA is tightly coiled in chromatinHistonesWhey
Proteasome
Exon and Introns
- 28. Multiple Choice
The ________ is a protein that attaches to the silencer sequence on the DNA that stops Transcription.
Activator
Repressor
- 29. Multiple Choice
The GTP cap and the Poly-A tail regulate which level of eukaryotic gene expression?
Transcriptional
Post-Transcriptional
Pre-Transcriptional
Post-Translational
Translational
- 30. Multiple Choice
A cellular organelle that breaks down proteins marked with ubiquitin is a(n)
proteasome
mitochondria
roughER
golgi apparatus
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