Which term shows all 64 codons with the amino acids they code for?

• A. Codon table
• B. Anticodon
• C. Nucleus
• D. Ribosome

Answer: (A)

The main idea here is that a codon table is the map of the genetic code. Messenger RNA uses codons—three-letter sequences made from the bases A, U, C, and G—to specify which amino acids should be added during protein synthesis. There are 64 possible codons (4 options for each of 3 positions, 4^3), and the codon table shows which amino acid each codon codes for, including the three stop signals that end translation. This table also reflects redundancy: multiple codons can code for the same amino acid, which is why you’ll see several codons mapped to a single amino acid.

The other terms describe different things: an anticodon is the complementary triplet on tRNA that pairs with a codon, the nucleus is the cellular compartment where DNA is stored, and the ribosome is the machine that reads codons to assemble proteins but does not itself enumerate all codon-to-amino-acid pairs. So the term that shows all 64 codons with the amino acids they code for is the codon table.