What type of RNA processing occurs at the 5' end of mRNA molecules in eukaryotic cells? Addition of a guanine nucleotide Addition of up to 250 adenine nucleotides Removal of introns addition of 7MG Genes in eukaryotic cells often have intronic sequences coded for within the DNA. These sequences are ultimately not translated into proteins. Why? Intronic sequences are removed from RNA molecules by the spliceosome, which works in the nucleus. Introns are not transcribed by RNA polymerase. Introns are removed by catalytic RNAs in the cytoplasm. The ribosome will skip over intron sequences when translating RNA into protein.
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Step 1: During RNA processing in eukaryotic cells, a guanine nucleotide is added to the 5' end of mRNA molecules. Show more…
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What happens during RNA splicing in eukaryotes? The spliceosome removes intron sequences from RNA molecules in the nucleus. RNA polymerase removes noncoding sections of the primary transcript to produce a mature mRNA. Intron sequences are removed because the ribosome skips over introns during translation. The spliceosome removes exons and joins introns together into a continuous linear sequence.
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Question 12 If you expose a cell to chemicals that specifically disrupt the function of RNA polymerase, which of the following processes will be most directly affected? transcription translation DNA replication rate of mutation Question 13 In a ribosome in the process of translating a molecule of mRNA, the maximum number of codons that can be occupied by a tRNA at any one time is 1. 2. 3. 64. Question 14 Similar to genes that code for proteins, the products of genes that code for rRNA and tRNA must also undergo translation. transcription. replication. mutation.
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Questions $7-13$ Choose from the terms below. (A) Translation (B) Transcription (C) Replication (D) RNA processing (E) None of the above Synthesis of DNA
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Molecular Genetics
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