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| 1 |
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Q:
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A strain of bacteria is transformed with a gene encoding for telomerase. This is most likely going to have which of the following effects on the bacterial strain? |
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A
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Increase life span by elongating the telomeres. |
B
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Decrease life span by shortening the telomeres. |
C
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It depends on the type of bacterium. |
D
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No effect. |
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Tags:
Control of Gene Expression in Prokaryotes | Prokaryotes | |
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| 2 |
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Q:
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To properly express human proteins in prokaryotic systems, human mRNAs typically must first be reverse transcribed to DNA before being transformed into the prokaryote for expression. Reverse transcription of the mRNA to DNA is necessary for proper expression because |
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A
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prokaryotes do not use the same set of nucleotides as humans and need to be transformed with human DNA. |
B
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prokaryotes are unable to perform the correct post-translational modifications on the human proteins. |
C
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prokaryotes are unable to splice exons and the human mRNA has the exons spliced. |
D
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prokaryotes are unable to translate human genes. |
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Tags:
Control of Gene Expression in Prokaryotes | |
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| 3 |
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Q:
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Certain antibiotics kill bacteria by inhibiting translation, directly affecting the ribosomes. These antibiotics are not also damaging to human cells because: |
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A
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human ribosomes are protected from antibiotics by being in the nucleus. |
B
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human cells have enzymes that can degrade the antibiotics. |
C
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the antibiotics are only capable of entering the bacterial cells. |
D
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bacterial ribosomes are structurally different from human ribosomes. |
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Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | Prokaryotes | |
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| 4 |
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Q:
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Which of the following is NOT a feature of prokaryotic gene regulation? |
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A
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DNA-protein interactions |
B
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Protein binding that activates transcription |
C
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Protein binding that inhibits transcription |
D
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Involvement of the nucleus and cytoplasm for gene expression |
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Tags:
Control of Gene Expression in Prokaryotes | |
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| 5 |
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Q:
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Which of the following modifications listed below is NOT required to express a eukaryotic gene inside of a bacterium? |
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A
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Removal of the introns |
B
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Addition of certain elements to the mRNA after transcription |
C
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Replacement of the eukaryotic termination element with a prokaryotic one |
D
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Replacement of the existing promoter with a prokaryotic promoter |
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Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | |
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| 6 |
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Q:
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The preferred food source for E. coli is glucose, but in the absence of glucose, E. coli can metabolize other sugar sources, like tremalose. The tremalose operon is regulated by a repressor protein which ONLY binds to the operator in the absence of tremalose. Moreover, the operon is also regulated by an activator which ONLY binds to the promoter (where RNA polymerase binds) in the absence of glucose. Binding of this activator is needed for any expression of tremalose operon genes. Which of the following correctly describes the conditions under which the tremalose operon will be expressed? |
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A
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In the presence of BOTH glucose and tremalose
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B
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In the absence of BOTH glucose and tremalose
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C
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In the presence of glucose and the absence of tremalose
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D
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In the absence of glucose and the presence of tremalose
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Tags:
Control of Gene Expression in Prokaryotes | Protein Structure and Function | |
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| 7 |
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Q:
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Which of the following is NOT correct for both prokaryotic and eukaryotic gene regulation? |
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A
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Protein binding to a segment of DNA can repress transcription.
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B
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Protein binding to a segment of DNA can activate transcription.
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C
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Allosteric effectors regulate the activity of regulatory proteins.
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D
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Promoters are DNA segments that can influence another strand of DNA via binding of certain factors, such as RNA polymerase
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Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | |
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| 8 |
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Q:
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In normal E. coli, which of the following conditions would be the most ideal for the energy-efficient transcription of the lacZ and lacY genes of the lac operon? |
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A
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Low glucose, low lactose
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B
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High glucose, low lactose
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C
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Low glucose, high lactose
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D
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High glucose, high lactose
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Tags:
Control of Gene Expression in Prokaryotes | Carbohydrates | |
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