alleryStart learning →How long does the E. coli translation apparatus take to add one amino acid?
AAbout 0.5 seconds
BAbout 0.05 seconds
CAbout 5 seconds
DAbout 0.005 seconds
Answer & Solution
Correct answer: B. About 0.05 seconds
1. The E. coli translation apparatus takes only 0.05 seconds to add each amino acid.
2. Multiplying that by 200 residues gives 10 seconds for a 200-amino acid protein.
3. Checking the arithmetic rules out the neighbouring values, since 0.5 seconds each would need 100 seconds for that protein.
4. At 0.005 seconds each the same protein would take only one second, which is faster than the stated figure.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.5 Ribosomes and Protein Synthesis_
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