Discussing "the importance of translation", in full

A recurring holistic Excellence question: not just describing what translation IS, but explaining why it matters and why DNA cannot skip straight to being a protein.

The full four-part structure this question rewards

1. DESCRIBE PROTEIN SYNTHESIS overall: DNA → (transcription) → mRNA → (translation) → polypeptide, naming both stages and where each occurs.
2. EXPLAIN TRANSLATION specifically: mRNA codons are read at the ribosome; tRNA molecules, each carrying a specific amino acid, pair their anticodon to the matching mRNA codon; amino acids are joined in the order the codons specify to build the polypeptide.
3. DISCUSS THE RELATIONSHIP between codons, anticodons, tRNA, mRNA and amino acids: each mRNA codon is complementary to one tRNA anticodon, and each tRNA carries the ONE specific amino acid that its anticodon corresponds to — this pairing is what translates a base sequence into an amino acid sequence.
4. JUSTIFY WITH TWO REASONS why DNA is not directly translated: (a) DNA must stay protected inside the nucleus and intact as the master copy, since damage to it would be permanent and affect every future protein made from that gene; (b) ribosomes (where translation happens) are in the cytoplasm and can only read single-stranded mRNA, not double-stranded DNA — transcription converts the message into a form translation can actually use.

Giving only one reason where the question explicitly asks for TWO

The instruction "justify with TWO reasons why DNA is not directly translated" is checking for two GENUINELY DIFFERENT reasons (protection/master-copy integrity, AND the ribosome/molecule-compatibility reason) — restating one reason in different words does not satisfy the "two reasons" requirement. Worked example Discussing the codon/anticodon/tRNA/mRNA/amino-acid relationship Discuss the relationship between codons, anticodons, tRNA, mRNA, and amino acids. Each mRNA CODON is a group of three bases, read in sequence at the ribosome. Each tRNA molecule has a matching ANTICODON, complementary to one specific mRNA codon. Each tRNA carries the ONE amino acid that corresponds to its own anticodon — the tRNA is the physical link between a base sequence and an amino acid. As each codon is read, the tRNA with the matching anticodon delivers its amino acid, and the ribosome joins amino acids in sequence to build the polypeptide. ✓ The chain (codon → matching anticodon → tRNA → specific amino acid → joined into the polypeptide) is what "discuss the relationship" is asking for — not just defining each term separately.

Practice for this standard covers the whole topic — flashcards and quiz.