The Cell Lecture 7

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  • Created by: saraht83
  • Created on: 01-05-16 15:00
What four components does translation require?
ribosomes, tRNA, activating enzymes + mRNA
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What are the three phases of translation?
initiation, elongation, termination
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What happens during initiation?
complex forms, initiator tRNA charged with methionine + small ribosomal subunit bound to mRNA triggers beginning of translation
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What happens during elongation?
ribosome moves along mRNA in 5'-to-3' direction, polypeptides grow from N terminus, charged tRNA's bring amino acids to the ribosome sequentially, specificity provided by the anticodon interaction + the accuracy of aminoacyl-tRNA synthetases
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What happens during termination?
presence of stop codon in A site of ribosome, completed protein released
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What is a polysome?
more than 1 ribosome moves along mRNA at one time, multiple copies of same protein made
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Card 2

Front

What are the three phases of translation?

Back

initiation, elongation, termination

Card 3

Front

What happens during initiation?

Back

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Card 4

Front

What happens during elongation?

Back

Preview of the front of card 4

Card 5

Front

What happens during termination?

Back

Preview of the front of card 5
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