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Chapter 13: Problem 32

In which of the ribosomal sites, the A site, P site, and/or E site, could the following be found? A. A tRNA without an amino acid attached B. A tRNA with a polypeptide attached C. A tRNA with a single amino acid attached

Short Answer

Expert verified
A. E site, B. P site, C. A site

Step by step solution

01

Identify which tRNA goes to which ribosomal site

The A site accepts an aminoacyl tRNA. This tRNA has an amino acid attached. The P site holds the tRNA carrying the growing polypeptide chain. This tRNA has a polypeptide chain attached. The E site releases dissociated (uncharged) tRNAs so they can be recharged with free amino acids.
02

Match the given options with the appropriate sites

A. A tRNA without an amino acid attached would be found at the E site, as tRNAs in this site are uncharged. B. A tRNA with a polypeptide attached would be found at the P site, where the tRNA holds the growing peptide chain. C. A tRNA with a single amino acid attached would be found at the A site, as this is where tRNAs that are charged with an amino acid enter the ribosome.

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Most popular questions from this chapter

How does a eukaryotic ribosome select its start codon? Describe the sequences in eukaryotic mRNA that provide an optimal context for a start codon.

Explain the functional roles of the A, P, and E sites during translation.

What is the function of the nucleolus?

Is it necessary for a cell to make 61 different tRNA molecules, corresponding to the 61 codons for amino acids? Explain your answer.

How many different sequences of mRNA could encode a peptide with the sequence proline-glycine-methionine-serine?
See all solutions

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