Self-splicing introns are called ribosomes splicing enhancers ribozymes intron silencer
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- The Lariat Intermediate in RNA Splicing Draw the structures that comprise the lariat branch point formed during mRNA splicing: the invariant A. its 5’-R neighbor, its 3’-Y neighbor, and its 2’-G neighbor.During RNA processing _______ are spliced out by snRNPs which recognize a _______. introns; TATA box introns; sequence at the boundary exons; sequence at the boundary exons; TATA boxA pre-initation complex (PIC) is required for transcription to begin. State which TFII protein has catalytic function.
- RNA splicing removes ________ from the RNA transcript. a. exons b. axons c. intronsThe assembly of transcription factors on a promoter begins some 25 nucleotides upstream where it binds to a start _______________ sequence Group of answer choices TAAT ATTA TATA ATGCthe difference in primary structure between related tropomyosin informs arises from a) alternative splicing b) C-to-U editing c) farnesylation d) H3K4 methylation e) targetting to secretory vesicles
- 34.. heterochromatic regions decondense for gene expression a. pre-transcriptional controlb. transcriptional controlc. translational controld. post-translational controlduring sicing,introns of pre-mRNAs go through an intermediate stage when they are shapedlike: a lariat acloverleaf a circle the greek letter thetaSplicing involves excision of introns excision of exons addition of exons addition of introns
- Which of the following mechanisms may create multiple mRNAsfrom the same gene?a. posttranslational controlb. alternative mRNA splicingc. binding of a transcription factord. chromatin remodelinge. miRNAs49Eukaryotic RNA polymerases can be distinguished by their sensitivities to ( ). 50Each bacterial mRNA open reading frame has its own ( ) codon. 51Two nuclear splicing intermediates resemble ______________. A.helicesb.lariatsc.hairpinsD.projectionsRegarding the trp operon: when levels of tryptophan are low, the ___ hairpin forms, resulting in _____ of transcription. Group of answer choices 2-3; termination 3-4; termination 3-4; continuation 2-3; continuation
