https://padlet.com/1010569/pdud7n0qpzsw Made with joy en-us 2017-06-15 17:26:02 UTC 2017-06-20 16:22:13 UTC hello@padlet.com 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/176582467 Where a protein is made from DNA.]]> 2017-06-15 17:32:57 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/176582467 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/176999630 Transcription is the first step in protein synthesis. It basically transcribes mRNA from a DNA gene in the nucleus. Within transcription there are three stages. Those stages are initiation, elongation, and termination. ]]> 2017-06-20 15:36:36 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/176999630 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177000206 During initiation RNA polymerase binds to DNA at a specific sequence of nucleotides called the promoter. The promoter contains an initiation site where transcription of the gene begins. RNA polymerase unwinds DNA at the beginning of the gene.]]> 2017-06-20 15:41:44 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177000206 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177000815 During elongation the RNA strand gets longer thanks to the addition of new nucleotides. Also RNA polymerase "walks" along one strand of DNA, known as the template strand. For each nucleotide in the template RNA polymerase adds a matching RNA nucleotide to the 3' end of the RNA strand]]> 2017-06-20 15:46:57 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177000815 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177001331 During termination as the RNA polymerase keeps transcribing it will get a signal to stop. The process of ending transcription is called termination. It happens once the polymerase transcribes a sequence of DNA known as terminator. ]]> 2017-06-20 15:51:36 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177001331 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177001786 The last step of protein synthesis is translation. Translation is the final step from DNA to a protein. Like transcription it is broken up into three stages. Those stages are initiation, elongation, and termination. ]]> 2017-06-20 15:55:56 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177001786 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177002327 During initiation in translation a small sub-unit of a ribosome is charged with a tRNA + the amino acid methionine encounters an mRNA. It attaches and starts to scan for a start signal.]]> 2017-06-20 16:01:06 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177002327 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177002682 When it finds the start sequence AUG, the codon for the amino acid methionine, the large subunit joins the small one to form a complete ribosome and the protein synthesis is initiated. ]]> 2017-06-20 16:04:53 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177002682 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177002972 During elongation in translation a new tRNA+ amino acid enters the ribosome, at the next codon downstream of the AUG codon. If its anticodon matches the mRNA codon its basepairs and the ribosome can link the two amino acids together. The ribosome then moves one triplet forward and a new tRNA+ amino acid can enter the ribosome and the procedure is repeated.]]> 2017-06-20 16:07:52 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177002972 1010569 https://padlet.com/1010569/pdud7n0qpzsw/wish/177003490 During termination in translation the ribosome reaches one of three stop codons where there are no corresponding tRNA's to that sequence. Instead termination proteins bind to the ribosome and stimulate the release of the polypeptide chain which makes a protein.]]> 2017-06-20 16:13:33 UTC https://padlet.com/1010569/pdud7n0qpzsw/wish/177003490