Final answer:
During elongation, a ribosome contains mRNA, large and small ribosomal subunits, initiation factors, GTP, Mg2+, and peptidyl transferase.
Step-by-step explanation:
During elongation, a functional ribosome will contain the following components:
- mRNA
- Large and small ribosomal subunits
- Initiation factors
- GTP
- Mg2+
- Peptidyl transferase
Elongation is the second stage of protein synthesis, following initiation. It involves the addition of amino acids to the growing polypeptide chain according to the sequence of codons on the mRNA template.