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Questions and Answers
What is the primary factor involved in termination of RNA synthesis?
What is the role of an operator in gene regulation?
How does DNA methylation control gene expression in eukaryotes?
Which relationship correctly represents the flow of genetic information?
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Which of the following components is a part of the negative control of gene expression?
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Study Notes
RNA Synthesis Termination
- The primary factor involved in termination of RNA synthesis is the recognition of a termination signal on the DNA by termination proteins.
Gene Regulation
- Negative control: a type of gene regulation where a regulatory protein binds to the operator, preventing RNA polymerase from transcribing the gene.
- An operator: a specific DNA sequence that acts as a binding site for regulatory proteins, controlling transcription of adjacent genes.
Genotype, Phenotype, and Heredity
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Relationship among DNA, genotype, phenotype, and heredity:
- DNA → Genotype (genetic makeup)
- Genotype → Phenotype (physical traits and characteristics)
- Phenotype → Heredity (inherited traits)
Gene Expression in Eukaryotes
- Methylation of DNA in eukaryotes: a process that controls gene expression by adding a methyl group to cytosine residues in DNA, making it inaccessible to transcription factors, thereby silencing gene expression.
- Methylation of DNA in eukaryotes is an important epigenetic mechanism that regulates gene expression, especially during development and cell differentiation.
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Description
Quiz questions about RNA synthesis, gene regulation, and related biological processes.
