Chapter 13 Science Notes

Chapter 13: ribonucleic astringent and Protein Synthesis * 13.1 ribonucleic blistering * The role of ribonucleic acid * How does ribonucleic acid resist from deoxyribonucleic acid?: There are trey important differences amidst ribonucleic acid and deoxyribonucleic acid: (1) the sugar in ribonucleic acid is ribose alternatively of deoxyribose, (2) ribonucleic acid is generally single- mountain chained and not double-stranded, and (3) ribonucleic acid contains uranium in place of thymine * Comparing RNA and deoxyribonucleic acid: on that point are three differences in RNA and DNA. * Functions of RNA * messenger RNA: type of RNA that carries copies of instructions for the assembly of amino acids into proteins from DNA to the rest of the carrell * Ribosomal RNA: type of RNA that combines with proteins to form ribosomes * Transfer RNA: type of RNA that carries all(prenominal) amino acid to a ribosome during protein discount * RNA synthesis * How does the cell hold RNA?: in organization, segments of DNA serve as templates to form complementary RNA motes.

* Transcription: synthesis of an RNA molecule from a DNA template * RNA polymerase: enzyme that links together the ontogeny grasp of RNA nucleotides during agreement using a DNA strand as a template * Promoters: specific region of a gene where RNA polymerase can bind and begin transcription * RNA editing * Introns: se quence of DNA that is not abstruse in codin! g for a protein * Exons: expressed sequence of DNA; codes for a protein * 13.2 Ribosomes and Protein Synthesis * The genetic code * What is the genetic code, and how is it organize up?: the genetic code is read three garner at a time, so that to each one cry is three bases want and corresponds to a single amino acid. * Polypeptides: long chain of amino acids that makes proteins * Genetic code: devote of fighting of codons of mRNA, each of which directs the incorporation of a particular amino acid into a protein during protein synthesis * Codon:...If you want to get a safe essay, order it on our website: OrderCustomPaper.com

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