GEN-3000 Lecture Notes - Lecture 3: Dna Replication, Polytene Chromosome, Chromatin Remodeling
20 Oct 2017
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Study guide exam 3 (ch 9-12: ch. Rna has u instead of t: transcriptional unit. Which of the following lists steps of mrna production in eukaryotes in the correct order: transcription, 5" cap addition, addition of poly-a tail, exon splicing, passage through nuclear membrane. Which of the following is characteristic of transcription in eykaryotes but not in prokaryotes: exon splicing, **introns must be removed from eukaryotic pre-mrna; prokaryotic mrna does not contain introns. It provides a site for ribosome binding in the cytoplasm: to protect the transcript from degradation, **the 5" cap is essential for recognition of the mrna by ribosomes in the cytoplasm. However, a single codon can only ever specify one amino acid. A dna sequence produces a mutant protein in which several amino acids in the middle of the protein differ from the normal protein. In eukaryotes, a single gene is transcribed at a time. Which amino acid does this triplet recruit: aug; methionine.
