BIOL 1090 Study Guide - Comprehensive Final Guide: Atp Synthase, Keratin, Karyopherin
1 Dec 2016
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The nature of the gene and its expression. Different rnas (snrna, mrna, rrna, etc ) can be encoded. Differences between dna and rna: rna will replace the uracil component of thymine (both are pyrimidine, use ribose sugar, not deoxyribose, same in the aspect that both are synthesized in the 5" to 3" direction. The sequences of dna position at the rna polymerase to begin transcription at the beginning at of the gene until the end: In eukaryotes, the primary transcript is exported to the cytoplasm for translation. Addition of a poly(a) tail by poly(a) polymerase. Introns: noncoding sequences located between coding sequences: removed during pre-mrna, not present during mature mrna. Exons: sequences that remain in mature mrna after splicing. Ribosome has the e (exit), p, and a binding site. Ribosome scans to find where aug begins to start translation (kozak sequence) Ribosome starts from 5" in order to find a suitable place to start the translation.
