Podcast
Questions and Answers
Which of the following is true about gene expression in human cells?
Which of the following is true about gene expression in human cells?
- Cells can change the genes they express without altering their DNA sequence (correct)
- A typical cell expresses all of its 25,000 genes
- All human cells express the same RNAs and proteins
- Gene expression can be controlled only at the transcriptional level
What is the most common control point for controlling gene expression?
What is the most common control point for controlling gene expression?
- Protein
- RNA
- Transcription (correct)
- DNA
What percentage of genes does a typical cell express?
What percentage of genes does a typical cell express?
- More than 90%
- All of its genes
- Around 50% (correct)
- Less than 10%
How can gene expression be controlled in eukaryotic cells?
How can gene expression be controlled in eukaryotic cells?
How can we determine which genes are expressed in certain conditions?
How can we determine which genes are expressed in certain conditions?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What does a yellow spot on a DNA chip indicate?
What does a yellow spot on a DNA chip indicate?
What does a blank spot on a DNA chip indicate?
What does a blank spot on a DNA chip indicate?
In what conditions do yeast cells express genes for glucose utilization?
In what conditions do yeast cells express genes for glucose utilization?
In what conditions do yeast cells express genes for ethanol utilization?
In what conditions do yeast cells express genes for ethanol utilization?
Which of the following is a mechanism for regulating eukaryotic gene expression after transcription?
Which of the following is a mechanism for regulating eukaryotic gene expression after transcription?
What is the function of histone acetyltransferases?
What is the function of histone acetyltransferases?
What is the role of microRNAs in gene expression regulation?
What is the role of microRNAs in gene expression regulation?
What happens when iron levels are low in a cell?
What happens when iron levels are low in a cell?
What is the function of ubiquitin in protein regulation?
What is the function of ubiquitin in protein regulation?
What is the role of histone deacetylases?
What is the role of histone deacetylases?
What is the function of RNA polymerase?
What is the function of RNA polymerase?
What is the function of the RNA-induced silencing complex (RISC)?
What is the function of the RNA-induced silencing complex (RISC)?
What is the purpose of alternative splicing?
What is the purpose of alternative splicing?
What is the function of the iron regulatory protein (IRP)?
What is the function of the iron regulatory protein (IRP)?
Which method is used to identify all mRNAs found in certain conditions?
Which method is used to identify all mRNAs found in certain conditions?
What does a yellow spot on a DNA microarray indicate?
What does a yellow spot on a DNA microarray indicate?
What does a black spot on a DNA microarray indicate?
What does a black spot on a DNA microarray indicate?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
Which type of regulatory protein prevents transcription of a gene?
Which type of regulatory protein prevents transcription of a gene?
Which structural polypeptide domain is found in most transcription regulators?
Which structural polypeptide domain is found in most transcription regulators?
What regulates the activity of the polymerase transcribing the tryptophan operon?
What regulates the activity of the polymerase transcribing the tryptophan operon?
What allows contact between an activator protein bound to an enhancer and a transcription complex bound to a promoter in eukaryotes?
What allows contact between an activator protein bound to an enhancer and a transcription complex bound to a promoter in eukaryotes?
What can acetyl groups on histones attract to promote transcription?
What can acetyl groups on histones attract to promote transcription?
What is the main function of transcriptional regulators?
What is the main function of transcriptional regulators?
Which of the following colors on a DNA microarray indicates genes that are expressed when glucose is utilized?
Which of the following colors on a DNA microarray indicates genes that are expressed when glucose is utilized?
What is the main function of transcriptional regulators?
What is the main function of transcriptional regulators?
Which type of regulatory protein prevents transcription of a gene?
Which type of regulatory protein prevents transcription of a gene?
What is the function of histone deacetylases?
What is the function of histone deacetylases?
In what conditions do yeast cells express genes for ethanol utilization?
In what conditions do yeast cells express genes for ethanol utilization?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What regulates the activity of the polymerase transcribing the tryptophan operon?
What regulates the activity of the polymerase transcribing the tryptophan operon?
How can gene expression be controlled in eukaryotic cells?
How can gene expression be controlled in eukaryotic cells?
What percentage of genes does a typical cell express?
What percentage of genes does a typical cell express?
Which structural polypeptide domain is found in most transcription regulators?
Which structural polypeptide domain is found in most transcription regulators?
Which of the following is a mechanism for regulating eukaryotic gene expression after transcription?
Which of the following is a mechanism for regulating eukaryotic gene expression after transcription?
What is the function of histone acetyltransferases?
What is the function of histone acetyltransferases?
What is the role of microRNAs in gene expression regulation?
What is the role of microRNAs in gene expression regulation?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
What is the function of the iron regulatory protein (IRP)?
What is the function of the iron regulatory protein (IRP)?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What is the purpose of DNA chips (microarrays) in gene expression analysis?
What is the most common control point for controlling gene expression?
What is the most common control point for controlling gene expression?
What can acetyl groups on histones attract to promote transcription?
What can acetyl groups on histones attract to promote transcription?
What is the function of the RNA-induced silencing complex (RISC)?
What is the function of the RNA-induced silencing complex (RISC)?
What regulates the activity of the polymerase transcribing the tryptophan operon?
What regulates the activity of the polymerase transcribing the tryptophan operon?
Which of the following is true about gene expression in human cells?
Which of the following is true about gene expression in human cells?
What allows contact between an activator protein bound to an enhancer and a transcription complex bound to a promoter in eukaryotes?
What allows contact between an activator protein bound to an enhancer and a transcription complex bound to a promoter in eukaryotes?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
What determines the rate at which RNA polymerase initiates new rounds of transcription?
What does a blank spot on a DNA chip indicate?
What does a blank spot on a DNA chip indicate?
What is the main function of transcriptional regulators?
What is the main function of transcriptional regulators?
What is the function of the iron regulatory protein (IRP)?
What is the function of the iron regulatory protein (IRP)?
What does a yellow spot on a DNA microarray indicate?
What does a yellow spot on a DNA microarray indicate?
What is the function of ubiquitin in protein regulation?
What is the function of ubiquitin in protein regulation?
What can acetyl groups on histones attract to promote transcription?
What can acetyl groups on histones attract to promote transcription?
What does a black spot on a DNA microarray indicate?
What does a black spot on a DNA microarray indicate?
