Different cell types, for example a muscle or a blood cell in the same organism retain O only a small fraction of their original set of genes, the ones they will need specifically for functioning, but can regenerate these lost genes as needed. O a complete set of all the same genes, but most of the genes have been permanently altered so that they cannot be transcribed into MRNA transcripts. O a complete set of their genes, and retain the ability to express those genes under certain circumstances into mRNA. O the ability to change their DNA to add regulatory elements that can turn off or on genes.

Different cell types, for example a muscle or a blood cell in the same organism retain O only a small fraction of their original set of genes, the ones they will need specifically for functioning, but can regenerate these lost genes as needed. O a complete set of all the same genes, but most of the genes have been permanently altered so that they cannot be transcribed into MRNA transcripts. O a complete set of their genes, and retain the ability to express those genes under certain circumstances into mRNA. O the ability to change their DNA to add regulatory elements that can turn off or on genes.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 10RQ: Control of gene expression in eukaryotic cells occurs at which level(s)? a. only the transcriptional...

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Researchers have successfully used gene therapy toameliorate some human genetic diseases by adding anormal gene copy to cells whose genomes originallyhad only nonfunctional mutant copies of that gene.For example, a form of blindness due to the lack of asingle protein called RPE65 has been reversed byintroduction of a normal RPE65 gene to cells of theretina of adults.a. The success of this gene therapy approach providesus with clues about the role of the RPE65 proteinin the retina. Do you think that RPE65 is neededfor the proper development of the human eye?b. Can you see a potential difficulty in applying this genetherapy approach for diseases like microcephaly?
which is the following is not a step in the process of de novo gene birth? o translated peptides provide some benefit to the orhganism, leading to selection for increased expression. o the open reading frame picks up sequences that enable recognition of its transcribed mRNA by the ribosome. o an open reading frame is created through mutations. o the gene copy number changes as a result of gene duplication to make paralogs.
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Control of gene expression in eukaryotic cells occurs at which level(s)? a. only the transcriptional level b. epigenetic and transcriptional levels c. epigenetic, transcriptional, and translational levels d. epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels
Mechanisms that govern gene expression do not operate during ___ . a. transcription b. RNA processing c. translation d. knockouts
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