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Gene Structure and Transcription Process

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Gene Structure and Transcription Process

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Questions and Answers

What is the primary function of a promoter in gene structure?

To inhibit transcription by binding transcription factors

To initiate the transcription of a gene (correct)

To enhance the stability of mRNA molecules

To serve as a binding site for ribosomes during translation

Which of the following statements most accurately describes the role of enhancers in gene expression?

Enhancers are responsible for the removal of introns from pre-mRNA

Enhancers are segments of RNA that produce coding sequences

Enhancers directly bind to RNA polymerase to increase transcription speed

Enhancers can significantly increase transcription levels from a distance (correct)

What is the consequence of DNA methylation in mammalian cells?

Facilitating the recruitment of ribosomes directly to mRNA

Blocking the binding of transcription factors and silencing gene expression (correct)

Increased transcriptional activation of all genes

Enhancing the splicing of introns from pre-mRNA

During the process of heterogenous RNA processing to form mRNA, which of the following steps is crucial?

The addition of a 5' cap and a poly-A tail Signup and view all the answers

Which of the following statements is true regarding transcription inhibitors?

They can target specific RNA polymerases to halt RNA synthesis Signup and view all the answers

What is a key characteristic of exons in gene structure?

They are the coding regions of a gene. Signup and view all the answers

During which step of transcription does RNA polymerase bind to the promoter?

Initiation Signup and view all the answers

Which of the following is NOT a mechanism of gene expression regulation?

DNA replication Signup and view all the answers

What is the role of transcription inhibitors in gene expression?

They block the synthesis of RNA from DNA. Signup and view all the answers

What process occurs to heterogenous RNA before it becomes mature mRNA?

Introns are spliced out and exons are joined. Signup and view all the answers