What makes up the initiation complex at the start of translation? D) The E site,

Question

What makes up the initiation complex at the start of translation? D) The E site, the P site, and the A site E) A codon and an anticodon the small ribosomal subunit, an mRNA molecule, and an initiator tRNA molecule A) A large and a small ribosomal subunit B) The small ribosomal subunit and an mRNA molecule What is the function of a ribosome? D) To hold mRNA and tRNAs in the correct positions to enable translation B) To attach amino acids onto the appropriate tRNAs C) To unwind the double-stranded DNA helix to enable translation E) To make more mRNA A) To direct transcription

Explanation / Answer

C) The small ribosomal subunit, an mRNA molecule and an initiator tRNA molecule- all assemble at the initiator codon and translation begins once it reaches start codon AUG. Initiation factor brings this components together.

B) to attach amino acid to the appropriate tRNAs- assembles polypeptide chain of proteins by adding amino acid. There are 3 sites of attachment for tRNA in ribosomes.

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