|
| 1 |
Go |
Q:
|
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? |
|
A
|
Initiation of a promoter |
B
|
Inactivation of equivalent host genes |
C
|
Entry into the nucleus |
D
|
Integration of the DNA into at host chromosome |
|
|
|
Tags:
Control of Gene Expression in Eukaryotes | Viruses | |
|
| 2 |
Go |
Q:
|
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 |
|
A
|
Post-transcriptionally modify native mRNA molecule with a 5' cap |
B
|
Remove the first several codons which are typically degraded first by exonucleases |
C
|
Suppress nuclease activity during periods of high transcription |
D
|
Translate mRNAs in the nucleus to protect against cytosolic nucleases |
|
|
|
Tags:
Control of Gene Expression in Eukaryotes | |
|
| 4 |
Go |
Q:
|
Certain antibiotics kill bacteria by inhibiting translation, directly affecting the ribosomes. These antibiotics are not also damaging to human cells because: |
|
A
|
human ribosomes are protected from antibiotics by being in the nucleus. |
B
|
human cells have enzymes that can degrade the antibiotics. |
C
|
the antibiotics are only capable of entering the bacterial cells. |
D
|
bacterial ribosomes are structurally different from human ribosomes. |
|
|
|
Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | Prokaryotes | |
|
| 5 |
Go |
Q:
|
Which of the following is NOT a feature of eukaryotic gene expression? |
|
A
|
Many genes are interrupted by sequences of noncoding DNA |
B
|
RNA synthesis and protein synthesis are coupled processes |
C
|
mRNA is modified extensively before translation |
D
|
Alternative mRNA splicing results in several different forms of the same protein |
|
|
|
Tags:
Control of Gene Expression in Eukaryotes | |
|
| 6 |
Go |
Q:
|
Which of the following modifications listed below is NOT required to express a eukaryotic gene inside of a bacterium? |
|
A
|
Removal of the introns |
B
|
Addition of certain elements to the mRNA after transcription |
C
|
Replacement of the eukaryotic termination element with a prokaryotic one |
D
|
Replacement of the existing promoter with a prokaryotic promoter |
|
|
|
Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | |
|
| 7 |
Go |
Q:
|
Which of the following statements regarding tumor-promoting mutations is FALSE? |
|
A
|
Oncogenic mutations are dominant, gain-of-function mutations |
B
|
Tumor-suppressor genes normally promote cell death (apoptosis) |
C
|
Proto-oncogenes promote DNA repair |
D
|
Proto-oncogenes can become oncogenes if their expression is greatly increased |
|
|
|
Tags:
Control of Gene Expression in Eukaryotes | Mitosis and Meiosis | |
|
| 8 |
Go |
Q:
|
Which of the following is NOT correct for both prokaryotic and eukaryotic gene regulation? |
|
A
|
Protein binding to a segment of DNA can repress transcription.
|
B
|
Protein binding to a segment of DNA can activate transcription.
|
C
|
Allosteric effectors regulate the activity of regulatory proteins.
|
D
|
Promoters are DNA segments that can influence another strand of DNA via binding of certain factors, such as RNA polymerase
|
|
|
|
Tags:
Control of Gene Expression in Prokaryotes | Control of Gene Expression in Eukaryotes | |
|
| 11 |
Go |
Q:
|
snRNPs are responsible for: |
|
A
|
modifying exons in mature mRNA. |
B
|
removing introns from pre-mRNA. |
C
|
placement of the poly-A tail to mRNA. |
D
|
placing the 5' cap onto mRNA. |
|
|
|
Tags:
Control of Gene Expression in Eukaryotes | |
|
|
Questions? We're here to help!
Ask Us
|
