Post-transcriptional regulation allows cells to control gene expression by regulating how often mRNA is translated into protein. Which of the following is not an example of post-transcriptional regulation?ANSWERControlling mRNA stabilitySmall non-coding RNAsOperonsRiboswitches
Question
Post-transcriptional regulation allows cells to control gene expression by regulating how often mRNA is translated into protein. Which of the following is not an example of post-transcriptional regulation?ANSWERControlling mRNA stabilitySmall non-coding RNAsOperonsRiboswitches
Solution
Para responder a la pregunta, primero debemos entender qué es la regulación post-transcripcional y los ejemplos que se mencionan.
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Controlling mRNA stability: La estabilidad del mRNA afecta cuánto tiempo permanece disponible para ser traducido en proteína. Esto es un claro ejemplo de regulación post-transcripcional.
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Small non-coding RNAs: Los pequeños RNAs no codificantes, como los microRNAs (miRNAs) y los small interfering RNAs (siRNAs), pueden unirse al mRNA y afectar su traducción o estabilidad. Esto también es un ejemplo de regulación post-transcripcional.
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Operons: Los operones son un conjunto de genes que se transcriben juntos bajo el control de un solo promotor. Este mecanismo es un ejemplo de regulación transcripcional, no post-transcripcional.
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Riboswitches: Los riboswitches son segmentos de mRNA que pueden cambiar de conformación en respuesta a metabolitos específicos, afectando la traducción del mRNA. Esto es un ejemplo de regulación post-transcripcional.
Por lo tanto, la opción que no es un ejemplo de regulación post-transcripcional es Operons.
Similar Questions
Which of the following is NOT a form of gene regulation in eukaryotes?Group of answer choicesChanges to the DNA sequence that change the introns that are includedA small RNA binding to the mRNA from the gene and causing it to be degraded.Covalent modifications of DNA that keep the base pairing the sameBinding of proteins to the enhancers or silences to change the amount of mRNA produced
Gene expression is regulated at many levels. Which level is regulated by proteins with DNA binding activity? Group of answer choicesTranslationmRNA stabilityTranscriptionmRNA splicing
Which of the following mechanism(s) control(s) the activity of transcriptional regulators in eukaryotic cells?
Which of the following does not control gene expression?
Which of the following best describes a promoter?Group of answer choicesA regulatory protein that accelerates mRNA turnoverAn element that promotes termination of transcriptionAn extracellular inducer that controls gene expressionA DNA sequence to which RNA polymerase may bind
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