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Questions and Answers
Which of the following statements about gene expression is correct?
Which of the following statements about gene expression is correct?
- They function as silencer sequences
- They function as operator sequences
- They function as enhancer sequences
- They function as promoter sequences (correct)
Which characteristic is associated with both cis and trans-acting sequences?
Which characteristic is associated with both cis and trans-acting sequences?
- They are necessary for gene transcription
- They influence genes on the same chromosome
- They function as promoter sequences
- They work as both cis and trans-acting sequences (correct)
What process is involved in gene imprinting?
What process is involved in gene imprinting?
- DNA phosphorylation
- DNA acetylation
- DNA glycosylation
- DNA methylation (correct)
Methylation of which oligonucleotide base sequence is possible?
Methylation of which oligonucleotide base sequence is possible?
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What is the functional product of the Xist gene?
What is the functional product of the Xist gene?
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Study Notes
Gene Expression
- Certain sequences function as promoter sequences, which are essential for gene expression.
- These sequences can act as both cis-acting (affecting genes on the same DNA molecule) and trans-acting sequences (affecting genes on other DNA molecules).
- Tissue-specific gene expression is made possible by specific sequences that are only active in certain tissues.
Gene Imprinting
- Gene imprinting involves the process of DNA methylation, which is crucial for the regulation of gene expression.
Methylation
- Methylation can occur at specific bases, such as AGGTTC, when using oligonucleotides.
Xist Gene
- The Xist gene produces a functional RNA product that lacks an open reading frame (ORF), meaning it does not code for a protein.
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