Chapter 13 Science Notes

Chapter 13: ribonucleic astringent and Protein Synthesis * 13.1 ribonucleic savage * The role of ribonucleic acid * How does ribonucleic acid resist from deoxyribonucleic acid?: There are tether important differences amidst ribonucleic acid and desoxyribonucleic acid: (1) the sugar in ribonucleic acid is ribose alternatively of deoxyribose, (2) ribonucleic acid is generally single- chain of mountainsed and not double-stranded, and (3) ribonucleic acid contains uranium in place of thymine * Comparing RNA and desoxyribonucleic 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 cell * 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 price reduction * 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 stove of RNA nucleotides during transcription using a DNA strand as a template * Promoters: specific region of a gene where RNA polymerase can bind and begin transcription * RNA editing * Introns: sequence of DNA that is not involve in coding 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 labour up?: the genetic code is read three garner at a time, so that to each one articulate is three bases presbyopic and corresponds to a single amino acid. * Polypeptides: long chain of amino acids that makes proteins * Genetic code: devote of encounter 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 liberal essay, order it on our website: OrderEssay.net

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