Essential Components of Translation in Protein Synthesis

Steps:

• Recall translation synthesizes proteins from mRNA.
• Identify core elements: mRNA provides codon sequence, ribosomes assemble proteins, amino acids form polypeptide chain, tRNA matches codons to amino acids.
• Eliminate options lacking any core element.
• Select option with all four essentials.

Why D is correct:

• Translation requires mRNA as template, ribosomes as site, amino acids as building blocks, and tRNA as adaptor per the central dogma of molecular biology.

Why the others are wrong:

• A: Describes transcription, not translation, as it uses DNA and RNA polymerase to make mRNA.
• B: Includes DNA and RNA polymerase, which are for transcription, not translation.
• C: Omits amino acids and tRNA needed to build and deliver protein components.

Final answer: D