Which of the following keep the mRNA message from being broken down by enzymes in the cytoplasm?Group of answer choicesMethyl capExonsPromotersPoly-A tailIntrons
Question
Which of the following keep the mRNA message from being broken down by enzymes in the cytoplasm?Group of answer choicesMethyl capExonsPromotersPoly-A tailIntrons
Solution
The structures that keep the mRNA message from being broken down by enzymes in the cytoplasm are the Methyl cap and the Poly-A tail.
Here's a step-by-step explanation:
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The Methyl cap: This is added to the 5' end of the pre-mRNA molecule during transcription. This cap is a modified guanine (G) nucleotide, and it protects the mRNA from degradation.
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The Poly-A tail: This is added to the 3' end of the mRNA molecule after transcription. The poly-A tail is a long chain of adenine nucleotides, and it also protects the mRNA from degradation.
Exons, promoters, and introns are all parts of the DNA or RNA sequence, but they do not have protective roles against mRNA degradation. Exons are the coding regions of a gene, promoters are the regions of DNA that initiate transcription of a gene, and introns are non-coding regions of a gene that are removed during RNA splicing.
Similar Questions
In the cytoplasm, the mRNA delivers the code to the __________________.
Which of the following is not a modification to the mRNA before leaving the nucleus?Exon splicingEnd cappingPromoter bindingIntron removal
The regions of DNA or RNA that are eventually expressed and translated into amino acid sequences are _____.Group of answer choicesexonsintrons
In eukaryotic cells, transcription occurs in the _____.Group of answer choicesnucleuscytoplasm
Which of the following processes is not a part of gene expression?Group of answer choicesreplicationtranscriptionprocessing of mRNAtranslationnone of the above
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