151k views
1 vote
Imagine you are following a particular tRNA, called tRNAQ, through the process of translation in a eukaryote. Consider the steps of tRNAQ translation. 1. The polypeptide is transferred to tRNAQ. 2. tRNAQ binds the A site of the ribosome. 3. tRNAQ binds the P site of the ribosome. 4. The ribosome shifts, with tRNAQ still bound. 5. tRNAQ binds the E site of the ribosome. In what order does tRNAQ go through the steps listed

User Valderann
by
8.4k points

1 Answer

3 votes

Answer:

2; 1; 4; 3; 4; 5

Step-by-step explanation:

A transfer RNA is a small RNA sequence (approximately 75-90 nucleotides in size) that serves as an adaptor molecule in order to link a specific triplet of nucleotides or 'codon' in the messenger RNA (mRNA) with a particular amino acid in the ribosomes during protein synthesis (i.e., during translation). The tRNAs have 1-a trinucleotide region known as the anticodon, which is a sequence complementary to a codon in mRNA, and 2-a region for attaching a particular amino acid. Moreover, a ribosome has three slots for binding tRNAs: A site, P site, and E site. The ribosomal A-site is the first location the t-RNA binds during translation; the P-site is the second binding site for tRNAs; and, finally, the E-site is the third site where deacylated tRNAs bind before their dissociation from the ribosome.

User Riccardo
by
8.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.