5. fill-in the blanks with the appropriate base sequence of the dna strand. 6. fill-in the blanks with the appropriate base sequence of the corresponding mrna strand. dna strand       tac   ttt   gca   gga  mrna strand                 animo acid sepuence met lys arg pro 7. using the codon chart below fill-in the blanks with the appropriate amino acid sequence. to use this codon table, the first codon is located in the center of the circle and you work your way out the edge to determine the amino acid.