Question

The following sentences describe the process of translation. Fill in each blank using the terms provided and then arrange the sentences in the correct order, beginning with the event that occurs first.

- A small ribosomal subunit binds to a molecule of___ near its 5' end.
- The mRNA, and ___ribosomal subunits dissociate from each other.
- A peptide bond forms between the amino acid attached to the tRNA in the A site and the growing polypeptide chain attached the tRNA in the ___site.
- A charged tRNA with the___ that is complementary to the codon in the A site enters and binds to the A site.
- When the ribosome encounters a stop codon, a___ binds to the A site.
- The ribosome moves along the mRNA so that the tRNA that was in the___ site is now in the p site and the tRNA that was in the P site is now in the E site. The movement of the ribosome is called___ .
- The tRNA in the___ site is ejected.
- The release factor breaks the convalent bond that links the newly synthesized___ to the tRNA in the P site.
- A changed ___molecule with a UAC anticodon binds to the first AUG codon in the mRNA strand.
- A large ribosomal subunit associates with the___ ribosomal subunit.

1. Translocation
2. rRNA
3. A
4. Small
5. 2
6. polynucleotide chain
7. anticodon
8. polypeptide chain
9. medium
10. E
11. codon
12. nitrogenous base
13. snRNA
14. release factor
15. P
16. mRNA
17. 3
18. terminantor
19. amino acid
20. tRNA

Answer 1

The correct order of the sentences describing the process of translation is: 1) A small ribosomal subunit binds to a molecule of mRNA near its 5' end. 2) A charged tRNA with the anticodon that is complementary to the codon in the A site enters and binds to the A site. 3) A peptide bond forms between the amino acid attached to the tRNA in the A site and the growing polypeptide chain attached to the tRNA in the P site.

Step-by-step explanation:

The correct order of the sentences describing the process of translation is:

1. A small ribosomal subunit binds to a molecule of mRNA near its 5' end. (4)
2. A charged tRNA with the anticodon that is complementary to the codon in the A site enters and binds to the A site. (3)
3. A peptide bond forms between the amino acid attached to the tRNA in the A site and the growing polypeptide chain attached to the tRNA in the P site. (7)
4. When the ribosome encounters a stop codon, a release factor binds to the A site. (14)
5. The ribosome moves along the mRNA so that the tRNA that was in the P site is now in the E site and the tRNA that was in the E site is ejected. The movement of the ribosome is called translocation. (1)
6. The tRNA in the E site is ejected. (10)
7. The release factor breaks the covalent bond that links the newly synthesized polypeptide chain to the tRNA in the P site. (8)
8. A large ribosomal subunit associates with the small ribosomal subunit. (5)
9. The mRNA, small ribosomal subunit, and large ribosomal subunits dissociate from each other. (9)
10. A changed tRNA molecule with a UAC anticodon binds to the first AUG codon in the mRNA strand. (19)