Which statement correctly describes the genetic code?

• A. Nucleotide language of DNA is 'translated' and 'transcribed' into the amino acid language of proteins
• B. Proteins are directly coded by DNA without RNA intermediates
• C. RNA is translated into DNA
• D. Amino acids are encoded by DNA directly without transcription

Answer: (A)

The main idea is how genetic information is read and used to make proteins: DNA holds the nucleotide sequence, this information is first transcribed into RNA, and then the RNA is translated into a chain of amino acids that folds into a protein. The statement captures this two-step flow, describing how the nucleotide language of DNA becomes the amino acid language of proteins through transcription and translation. In other words, the genetic code relies on an RNA intermediary and the ribosome machinery to convert sequence information into a protein, with codons in RNA specifying which amino acids are added.

The other options don’t fit because they ignore the essential RNA intermediary or describe the wrong direction of information flow: proteins aren’t directly coded by DNA without RNA intermediates, RNA isn’t translated into DNA, and amino acids aren’t encoded directly by DNA without transcription.