Differential gene expression describes how... (Choose the answer the best illustrates the definition of differential gene expression.) O each cell in your body expresses only a subset of its genes. O every cell in your body expresses all its genes, but at different times. O every cell in your body expresses only a subset of its genes, but all these cells exprèss the same subset of genes. different cells in your body express different subsets of genes.

Differential gene expression describes how... (Choose the answer the best illustrates the definition of differential gene expression.) O each cell in your body expresses only a subset of its genes. O every cell in your body expresses all its genes, but at different times. O every cell in your body expresses only a subset of its genes, but all these cells exprèss the same subset of genes. different cells in your body express different subsets of 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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. Null alleles (mutant genes) produce no protein product. This is a genetic change. However, epigeneticallysilenced genes also produce no protein product. Howdoes one determine experimentally whether a genehas been silenced by mutation or has been silencedepigenetically?
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.
How would you explain gene expression? How is it that a particular genotype is actually expressed as a phenotype? I am looking for details here, including an explanation of the molecular mechanisms involved.
The human body contains many distinct cell types yet almost all human cells contain the same genome with 21,000 genes. The distinct cell types are primarily due to differences in gene expression. Assume that one set of 1000 genes is expressed in all cell types and that the remaining 20,000 genes can be divided into sets of 1000 genes that are either all expressed or all not expressed in a given cell type. How many different cell types are possible if each cell type expresses 10 sets of these genes? Note that the number of combinations of n objects into m sets is given by n !/ (m!(n-m)!) where n! = 1*2*…*(n 2 1)*n.
Gene expression is... O How genes are replicated into two new strands identical to each other O How genes are duplicated, forming a new gene O How genes are mutated, creating a new allele O How genes are transcribed and translated into protein
4e. You also study the expression of 3 different mutants for this gene. For each mutant answer the following: Does this mutation change the sequence of the protein produced? Why or why not? If it does change the sequence of protein be sure to write out the new sequence. If it does not change the protein sequence, what effect (if any) would you expect it to have on expression of the gene? 1 20 ORI 40 60 5'...TTCGAGCTCTCGTCGTCGAGATACGCGATGATATTACTGGTAATATGGGGATGCACTATC...3' 3' ...AAGCTCGAGAGCAGCAGCTCTATGCGCTACTATAATGACCATTATACCCCTACGTGATAG...5' * promoter
Are all of your genes expressed in every cell in your body? Explain your answer and include an example in your explanation.
4e. You also study the expression of 3 different mutants for this gene. For each mutant answer the following: Does this mutation change the sequence of the protein produced? Why or why not? If it does change the sequence of protein be sure to write out the new sequence. If it does not change the protein sequence, what effect (if any) would you expect it to have on expression of the gene? 1 20 ORI 40 60 5'..TTCGAGCTCTCGTCGTCGAGATACGCGATGATATTACTGGTAATATGGGGATGCACTATC...3’ 3'...AAGCTCGAGAGCAGCAGCTCTATGCGCTACTATAATGACCATTATACCCCTACGTGATAG...5’ promoter i. Mutant A has a single base pair substitution with the T/A being replaced with C/G base pair at position 35 (position denoted by the * in the sequence above). ii. Mutant B has a 2 G/C pairs inserted between position 19 and 20 (position denoted by the ^ in the sequence above).
e. You also study the expression of 2 different mutants for this gene. For each mutant answer the following: Does this mutation change the sequence of the protein produced? Why or why not? o If it does change the sequence of protein be sure to write out the new sequence. If it does not change the protein sequence, what effect (if any) would you expect it to have on expression of the gene? 1 20 ORI 40 60 5'..TTCGAGCTCTCGTCGTCGAGATACGCGATGATATTACTGGTAATATGGGGATGCACTATC...3’ 3' ...AAGCTCGAGAGCAGCAGCTCTATGCGCTACTATAATGACCATTATACCCCTACGTGATAG...5' promoter i. Mutant A has a single base pair substitution with the T/A being replaced with C/G base pair at position 35 (position denoted by the * in the sequence above).
Which of the following are possible reasons that a cell would regulate its expression of a gene? (Select all that apply.) (a) an increased need for a particular enzyme (b) a decreased need for a particular enzyme (c) increasing temperature in the external environment (d) changing needs as an organism ages (e) death
Epigenetic markers tell your genes to switch on or off. What are two environmental factors that can cause an increase in the number of epigenetic markers that alter gene expression.?
Given the following schematic for a gene and its associated regulatory regions, answer the following questions by placing the correct letter in the provided blanks please put in the correct letter for the questions What region would provide cell type-specific expression of genes? region What site would significantly increase gene expression rates? = region What region or regions of this gene’s coding sequence are expressed as amino acids = region