Question

describe what 2 events happen to the molecules in the ribosome.
i need a hint
select all that apply:
the amino acid from the second trna binds to the amino acid on the first trna.
the amino acids are released from the ribosome.
the ribosome moves to allow another trna to bind to another codon.
the ribosome moves to release the mrna, no more codons are able to be read.

Explanation:

1. For "The amino acid from the second tRNA binds to the amino acid on the first tRNA": During translation in the ribosome, peptide bond formation occurs between the amino acid of the incoming (second) tRNA and the amino acid on the first tRNA, so this is correct.
2. For "The ribosome moves to allow another tRNA to bind to another codon": After peptide bond formation, the ribosome translocates (moves) along the mRNA to expose the next codon, allowing a new tRNA to bind, so this is correct.
3. For "The amino acids are released from the ribosome": Amino acids are not released from the ribosome; rather, a polypeptide chain is synthesized and released when translation terminates, so this is incorrect.
4. For "The ribosome moves to release the mRNA, no more codons are able to be read": The ribosome does not move to release mRNA in this way; translation terminates when a stop codon is reached, and the ribosome releases the polypeptide and mRNA, but this option's description is incorrect.

Answer:

• The amino acid from the second tRNA binds to the amino acid on the first tRNA.
• The ribosome moves to allow another tRNA to bind to another codon.