Question

Which of the following structures is needed for the translation initiation complex to form in eukaryotes?


promoter
5' cap
5' AUG 3'

Answer 1

In eukaryotes, the structure needed for the translation initiation complex to form is the **5' cap**. The 5' cap is a modified guanine nucleotide that is added to the front of the mRNA transcript and is essential for ribosome binding and the initiation of translation. The promoter is involved in transcription and is not part of the translation process, while "5' AUG 3'" refers to the start codon (AUG), which is essential for initiation but is not a structural component required for forming the initiation complex itself. Therefore, the correct answer is the **5' cap**.