20. Which of the following statements MOST accurately describes the process of translation initiation? (A) In both prokaryotes and eukaryotes, the small ribosomal subunit binds directly to the mRNA, followed by the recruitment of the initiator tRNA. (B) In prokaryotes, the 30S small subunit binds the Shine-Dalgarno sequence on the mRNA and then recruits the initiator tRNA; in eukaryotes, the small ribosomal subunit binds the 5' cap and then loads the initiator tRNA. (C) Prokaryotes and eukaryotes assemble a pre-initiation complex containing the initiator tRNA, and then locate the AUG codon through a scanning mechanism. (D) In prokaryotes, the 30S ribosomal subunit binds the mRNA via Shine-Dalgarno pairing and then the initiation factor IF-2 delivers the initiator tRNA into the P site. (E) In eukaryotes, the 60S subunit binds the eIF2, which subsequently binds the mRNA 5' cap and scans for the start codon. NTHU115