题目
题目

APBIO142-030 with labs S17 - CollegeBoard* AP Exam Prep: Multiple Choice

单项选择题

Which of the following normally leads to the production of functional messenger RNA in eukaryotic cells?

选项
A.A decrease in the rate of ribosome synthesis
B.The formation of peptide bonds between adjacent nucleotides
C.A decrease in RNA polymerase activity
D.The removal of portions of RNA known as intervening sequences (introns)
E.The replication of new messenger RNA molecules from existing messenger RNA molecules
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标准答案
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思路分析
In eukaryotic cells, the production of functional messenger RNA (mRNA) involves not just transcription but also RNA processing steps that convert the primary transcript into a mature, translatable mRNA. Option 1: 'The removal of portions of RNA known as intervening sequences (introns)' corresponds to RNA splicing, a key processing st......Login to view full explanation

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类似问题

In eukaryotes, what does the mRNA transcript contain? 

In eukaryotic cells, the initial RNA transcript (pre-mRNA) contains non-coding segments called [ Select ] spliceosomes promoters exons introns polymerase that intervene between coding regions. Before the RNA leaves the nucleus, a large protein-RNA complex called the [ Select ] introns polymerase exons ribosomes spliceosomes removes these non-coding parts and joins the coding regions, known as [ Select ] promoters spliceosomes polymerase exons introns together. This process allows a single gene to encode multiple different proteins depending on which segments are treated as coding.

In eukaryotic cells, the initial RNA transcript (pre-mRNA) contains non-coding segments called [ Select ] polymerase exons promoters spliceosomes introns that intervene between coding regions. Before the RNA leaves the nucleus, a large protein-RNA complex called the [ Select ] introns polymerase exons ribosomes spliceosomes removes these non-coding parts and joins the coding regions, known as [ Select ] spliceosomes introns polymerase exons promoters together. This process allows a single gene to encode multiple different proteins depending on which segments are treated as coding.

Question at position 88 Eukaryotic mRNAs that have not been spliced can be translated.TrueFalse

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