CIE IGCSE Biology: 复习笔记:17.1.3 Genes & Proteins

CIE IGCSE Biology: 复习笔记:17.1.3 Genes & Proteins

DNA Base Sequence To Amino Acid Sequence: Extended

The DNA Base Sequence Determines the Amino Acid Sequence in Protein


  • The DNA code (a series of bases) is converted into proteins (a series of amino acids)
  • The process of protein synthesis has two stages
    • Transcription (rewriting the base code of DNA into bases of RNA
    • Translation (using RNA base sequence to build amino acids into sequence in a protein)
  • Therefore, the sequence of bases in a gene determines the sequence of amino acids that make a specific protein
  • Different sequences of amino acids give different shapes and functions to protein molecules


Exam Tip

Students often confuse sequences of bases (in DNA/RNA) with sequences of amino acids (in proteins).

Make sure you're clear which large molecule you're referring to and therefore, which monomers make up the larger molecule.