ribosomal proteins to make ribosomes tRNA bings to an amino acid and holds it

Ribosomal proteins to make ribosomes trna bings to an

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ribosomal proteins to make ribosomes, tRNA bings to an amino acid and holds itin place on ribosome until it is incorporated into a protein during translation Promoter – segment of DNA where transcription begins; this is where RNA polymerase attaches to the DNATerminator – transcription of the DNA strand ends at another special nucleotide sequence, which specifies the end of the gene oTranslation – RNA attaches to a ribosome, where the information in the RNA is translatedinto a corresponding sequence of amino acids to form a new protein molecule (cytoplasm) 1.An mRNA molecule binds to the small ribosomal subunits at the mRNA binding site. A special tRNA, called initiator tRNA, binds to the start codon (AUG) on mRNA, where translation begins. The tRNA anticodon (UAC)
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attaches to the mRNA codon (AUG) by pairing between the complementarybases. 2.The large ribosomal subunit attaches to the small ribosomal sub-unit mRNAcomplex, creating a functional ribosome. The initiator tRNA, with its aminoacid (methionine) fits into the P site of the ribosome. 3.The anticodon of another tRNA with its attached amino acid pairs with the second mRNA codon at the A site of the ribosome. 4.A component of the large ribosomal subunit catalyzes the formation of a peptide bond between methionine and the amino acid carried by the tRNA at the A site. 5.Following the formation of the peptide bond, the resulting two-peptide protein becomes attached to the tRNA as the A site. 6.After peptide bond formation, the ribosome shifts the mRNA strand by one codon. The tRNA in the P site enters the E site and it subsequently release from the ribosome. The tRNA in the A side bearing the two-peptide protein shifts into the p site, allowing another tRNA with its amino acid to bind to a newly exposed codon at the A site. Steps 3 – 6; protein lengthens7.Protein synthesis ends when the ribosome reaches a stop codon at the A site,which causes the completed protein to detach from the final tRNA. In addition, tRNA vacates the P site and the ribosome splits into its large and small subunits.
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Cell Division – the process by which cells reproduce themselves Germ Cell – gamete (sperm or oocyte) or any precursor cell destined to become a gamete Somatic cell – any cell of the body other than a germ cell Somatic Cell Division – undergoes a nuclear division mitosis Mitosis – cellular division Cytokinesis – cytoplasmic division Reproductive cell division – is the mechanism that produces gametes, the cells needed to form the next generation of sexually reproducing organisms. This process consists of a special two-step division called meiosis, in which the number of chromosomes in the nucleus, is reduced by half. Cell Cycle – is an orderly sequence of events in which a somatic cell duplicates its contents and divides in two.
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