BISC207 Lecture Notes - Lecture 6: Peptide, Release Factor, Transfer Rna

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chocolatecod698

15 Sep 2016

School

University of Delaware

Department

Biological Sciences

Course

BISC207

Professor

Nauen Jennifer

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Document Summary

Translation: using the information in mrna to build a protein. A group of 3 mrna bases= 1 codon. Sequence of bases in a codon specifies as amino acid, or an amino acid+start, or stop. Each base is part of only 1 condon (the code does not overlap) Making a protein product from the information in mrna. Ribosomes: complexes of protein and rrna that form the environment na for translation. Cartoon of ribosomes has a large subunit and a small subunit below; looks like a hamburger bun. Made of a complex of 2 types of organic molecules; these come together for translation. Transfer rna (trna): each type brings a specific aa to the ribosome. (must be able to recognize for exam) A specific type of enzyme attaches to the correct aa to the correct type of trna, forming charged trna. Initiation facts (proteins) bring the equipment for translation together.

Related Questions

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