How can external stimuli alter post-transcriptional control...

Name: Problem 35, Chapter 16: Biology for AP Courses
Uploaded: 2021-01-21T08:32:12-08:00
Duration: 1 min 6 s
Channel: Prashant Bana
Description: How can external stimuli alter post-transcriptional control of gene expression? a. UV rays can alter methylation and acetylation of proteins. b. RNA binding proteins are modified through phosphorylation. c. External stimuli can cause deacetylation and demethylation of the transcript. d. UV rays can cause dimerization of the RNA binding proteins.

How can external stimuli alter post-transcriptional control of gene expression? a. UV rays can alter methylation and acetylation of proteins. b. RNA binding proteins are modified through phosphorylation. c. External stimuli can cause deacetylation and demethylation of the transcript. d. UV rays can cause dimerization of the RNA binding proteins.

How can external stimuli alter post-transcriptional control of gene expression?
a. UV rays can alter methylation and acetylation of proteins.
b. RNA binding proteins are modified through phosphorylation.
c. External stimuli can cause deacetylation and demethylation of the transcript.
d. UV rays can cause dimerization of the RNA binding proteins.

Key Concepts

External Stimuli and Signal Transduction

External stimuli, such as environmental factors or stress signals, activate cellular signal transduction pathways. These signals can lead to modifications of key regulatory molecules, thus influencing various cellular processes including gene expression. In the context of post-transcriptional regulation, these signals can modify factors that interact with RNA, affecting its splicing, stability, transport, and translation.

Post-transcriptional Gene Regulation

Post-transcriptional regulation refers to the control mechanisms that act on RNA molecules after they have been transcribed from DNA. This includes processes such as RNA splicing, editing, transport, degradation, and translation. Alterations in these processes can profoundly influence the protein output of a cell, enabling a dynamic response to external signals.

RNA Binding Proteins and Their Regulation

RNA binding proteins play a critical role in post-transcriptional regulation by interacting with RNA molecules to modulate splicing, stability, localization, and translation. The activity of these proteins can be regulated by various post-translational modifications, which alter their binding affinity, function, or localization, thereby fine-tuning gene expression in response to external cues.

Protein Post-translational Modifications

Protein post-translational modifications, such as phosphorylation, methylation, acetylation, deacetylation, and demethylation, are chemical alterations that occur after protein synthesis. These modifications can alter the activity, stability, interaction, or localization of proteins, including RNA binding proteins. Such modifications enable rapid and reversible changes in protein function in response to external signals, thereby affecting post-transcriptional control of gene expression.

Please give Ace some feedback