In both prokaryotic and eukaryotic cells, gene regulation occurs primarily at the transcriptional level. This is because early regulation of gene expression prevents the organism from needlessly expending energy and resources to produce proteins it has no need for. a. True b. False; most gene regulation occurs at the post-translational level c. False; only eukaryotic organisms regulate gene expression at the transcriptional level
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
Answer all the questions please.
In both prokaryotic and eukaryotic cells, gene regulation occurs primarily at the transcriptional level. This is because early regulation of gene expression prevents the organism from needlessly expending energy and
| a. |
True |
|
| b. |
False; most gene regulation occurs at the post-translational level |
|
| c. |
False; only eukaryotic organisms regulate gene expression at the transcriptional level |
Transcription and translation occur simultaneously in eukaryotic organisms because both events take place in the cytoplasm.
| a. |
True |
|
| b. |
False; transcription and translation occur simultaneously in prokaryotic organisms because both events take place in the cytoplasm |
|
| c. |
False; transcription and translation occur simultaneously in both eukaryotic and prokaryotic organisms because both events take place in the cytoplasm |
The following is a template strand of DNA: 3' - ATAGCGTACAAGTGGATT - 5'. What sequence of amino acids would be produced as a result of transcribing and translating this DNA template?
a.
Met - Asn - Leu - Phe - His - [STOP]
b.
Tyr - Arg - Met - Phe - Thr - [STOP]
c.
Asn - Pro - Leu - Val - Arg - Tyr
d.
Met - Phe - Thr - [STOP]
e.
None of the above
The following is a template strand of DNA: 3' - ATAGCGTACAAGTGGATT - 5'. Imagine, for a moment, that the start codon has switched from "AUG" to "AUC." How many amino acids would be found in the polypeptide produced as a result of transcribing and then translating this DNA template?
| a. |
2 |
|
| b. |
3 |
|
| c. |
4 |
|
| d. |
5 |
|
| e. |
6 |
Histone acetylation leads to which of the following events?
| a. |
DNA becomes more tightly wound around the histone proteins, decreasing the potential level of transcription of the genes found in that stretch of DNA (i.e., genes are silenced or "muted") |
|
| b. |
DNA becomes more relaxed, increasing the potential level of transcription of the genes found in that stretch of DNA (i.e., increased access to genes) |
|
| c. |
DNA is converted into a series of phospholipids, which can then be incorporated into the membrane of the cell |
|
| d. |
RNA polymerase is recruited, allowing for the start of |
|
| e. |
None of the above |
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