Multiple Choice
In standard amino acid three-letter codes, which amino acid is represented by "TAC"?
3. Amino Acids
Amino Acid Three Letter Code
Multiple Choice
In the standard genetic code, the mRNA codon GAA specifies which amino acid (three-letter code)?
A
Gln
B
Glu
C
Gly
D
Asp
Verified step by step guidance1
Recall that the genetic code is a set of rules by which the sequence of nucleotides in mRNA is translated into the sequence of amino acids in a protein.
Identify the mRNA codon given: GAA.
Use the standard genetic code table to find which amino acid corresponds to the codon GAA.
Note that codons starting with 'GA' specify either Glutamic acid (Glu) or Aspartic acid (Asp), so focus on the third nucleotide 'A' to distinguish between them.
Confirm that the codon GAA codes for Glutamic acid, which has the three-letter code 'Glu'.
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