BIOL 200 Lecture Notes - Lecture 12: Ribosomal Rna, Messenger Rna, Peptide Synthesis

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ceruleanshark773

7 Jun 2016

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Now that you have the mrna you have to assemble the amino acids as. Must convert 3 nucleotide code to amino acid code. Translation in eukaryotes happens in the cytoplasm: prokaryotes happens at same time as transcription, right away ribosomes associate and translate. Three types of functional rnas are involved in protein synthesis: messenger rna (mrna): carries the genetic information from dna in the form of codons, transfer rna (trna): decipher the codons in mrna. One of the rrnas catalyzes the formation of a peptide bond between the n of the amino group of the incoming amino acid and the carboxy terminal c on the growing polypeptide chain. Assembled with small and large subunits of ribosome. Codon = 3 nucleotides that specify an amino acids. Roles of rna in protein synthesis: ribosome has small and large subunit. Can be composed of different numbers of subunits based on prokaryote/eukaryote. Each one associates with 1 or 2 rrnas.

Related Questions

If the bold term in each statement is correct hen write the letter C next to it. if the term is incorrect then replace it with the correct term.

The nucleotide bases found only in RNA and not in DNA is thymine.

The class of RNA molecules that carries the amino acids that are added to the growing polypeptide chain is tRNA.

During translation immediately after the first and second tRNA molecules become attached side by side on the mRNA., a hydrogen bond is formed between adjacent amino acids.

In the genetic code, 20 bases on the DNA code for a single amino acid.

The major lipid involved is transcription is RNA polymerase.

The one strand of DNA used as a template in the making of mRNA during transcription, is the template strand.

chocolatemuskrat416

Facts about ribosomes

Indicate whether each of the following statements aboutribosomes is true or false.

1. Ribosomes are composed of tRNA and protein. TrueFalse
2. During translation in eukaryotes, some ribosomes remain free inthe cytoplasm while others attach to protein channels embedded inthe RER. TrueFalse
3. During initiation of translation, the small ribosomal subunitjoins to the mRNA and initiator rRNA, followed by the largeribosomal subunit. TrueFalse
4. When a ribosome first assembles on the mRNA, the initiator tRNAoccupies the A site while the P and E sites are empty.TrueFalse
5. During translation, a charged tRNA first binds to the ribosomeif its anticodon matches the codon in the E site. TrueFalse
6. A peptide bond forms between the amino acid attached to a tRNAin the A site and the growing polypeptide attached to a tRNA in theP site. TrueFalse
7. Uncharged tRNA molecules in the E site are ejected from theribosome. TrueFalse
8. No more than 2 tRNA molecules are bound to a ribosome at anygiven time. TrueFalse
9. During translocation of the ribosome, tRNA molecules move fromthe P site, to the A site, to the E site, and are then ejected fromthe ribosome. TrueFalse
10. During translation, an amino acid attached to a tRNA in the Asite is transferred to a growing polypeptide attached to a tRNA inthe P site. TrueFalse

periwinklemuskrat632

Facts about ribosomes

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BIOL 200 Lecture Notes - Lecture 12: Ribosomal Rna, Messenger Rna, Peptide Synthesis

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