Question

What DNA sequence would code for the amino acid methionine?

Answer 1

The DNA sequence that codes for methionine is AUG, which is also the start codon for protein synthesis. Inserting an additional nucleotide after this sequence can lead to a frameshift mutation.

Step-by-step explanation:

The DNA sequence that codes for the amino acid methionine is AUG. This sequence serves as the start codon in the process of protein synthesis. During mRNA transcription, the DNA sequence is used to create a complementary RNA sequence. When the code AUG is encountered in this RNA sequence during translation, it signals the start of protein synthesis and the addition of methionine to the growing polypeptide chain. If an additional A nucleotide is inserted after the AUG sequence, this could result in a frameshift mutation, altering every subsequent amino acid encoded by the sequence.

Example of Codon-to-Amino Acid Conversion

For the DNA sequence 5'AUG-AAU-ACG-GCU-3', the corresponding amino acids are methionine-asparagine-threonine-alanine.

Answer 2

Consequently, methionine is the first amino acid to dock in the ribosome during the synthesis of proteins.

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