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| 1 |
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Q:
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A virus injects its DNA into a host animal cell. Which of the following is a necessary step for propagation of the viral DNA in the cell progeny and future generations of that cell? |
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A
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Initiation of a promoter |
B
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Inactivation of equivalent host genes |
C
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Entry into the nucleus |
D
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Integration of the DNA into at host chromosome |
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Tags:
Control of Gene Expression in Eukaryotes | Viruses | |
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| 2 |
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Q:
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mRNA molecules have a very short half-life as a result of cytosolic nucleases. To counteract the degradation of native mRNA molecules without affecting the degradation of mRNA molecules from intracellular pathogens, eukaryotic cells will do which of the |
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A
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Post-transcriptionally modify native mRNA molecule with a 5' cap |
B
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Remove the first several codons which are typically degraded first by exonucleases |
C
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Suppress nuclease activity during periods of high transcription |
D
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Translate mRNAs in the nucleus to protect against cytosolic nucleases |
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Tags:
Control of Gene Expression in Eukaryotes | |
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| 4 |
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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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| 5 |
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Q:
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Which of the following is NOT a feature of eukaryotic gene expression? |
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A
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Many genes are interrupted by sequences of noncoding DNA |
B
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RNA synthesis and protein synthesis are coupled processes |
C
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mRNA is modified extensively before translation |
D
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Alternative mRNA splicing results in several different forms of the same protein |
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Tags:
Control of Gene Expression in Eukaryotes | |
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| 6 |
Go |
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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| 7 |
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Q:
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Which of the following statements regarding tumor-promoting mutations is FALSE? |
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A
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Oncogenic mutations are dominant, gain-of-function mutations |
B
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Tumor-suppressor genes normally promote cell death (apoptosis) |
C
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Proto-oncogenes promote DNA repair |
D
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Proto-oncogenes can become oncogenes if their expression is greatly increased |
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Tags:
Control of Gene Expression in Eukaryotes | Mitosis and Meiosis | |
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| 8 |
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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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| 11 |
Go |
Q:
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snRNPs are responsible for: |
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A
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modifying exons in mature mRNA. |
B
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removing introns from pre-mRNA. |
C
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placement of the poly-A tail to mRNA. |
D
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placing the 5' cap onto mRNA. |
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Tags:
Control of Gene Expression in Eukaryotes | |
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