Protein Synthesis Practice
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1Name _________________________________________
Period ____ Date ____________
Protein Synthesis Practice
1. Use your amino acid chart to decode the amino acid sequence for the following mRNA strand. (Group the mRNA into
codons.)
mRNA: A U G A G C C C C U A C A C G U A A
amino acid sequence:
2. Use to following DNA strand to determine the amino acid sequence. First transcribe it into mRNA, then use your amino
acid chart to translate it into the amino acid sequence.
DNA: T A C G T G A A C C T T T T G A C C A T C
mRNA:
amino acid sequence:
3. Use your amino acid chart to complete the following table. The first column has been done for you.
Amino acid
Phenylalanine
methionine
(start)
mRNA
UUU
GGA
GUG
condon
DNA
AAA
GTC
GAT
4.
Below is the amino acid sequence of the protein lysozyme, an enzyme that destroys bacteria. Write the DNA sequence for
the first 5 amino acids in this protein.
amino acids:
mRNA:
DNA:
5. Is your DNA sequence above the same as your neighbor’s?
Explain why some people may have different DNA sequences
but still code for the same amino acid sequence.
SECOND BASE IN THE CODON
A
G
U
C
Lysine
Arginine
Isoleucine
Threonine
A
Lysine
Arginine
Methionine
Threonine
G
A
asparagine
Serine
Isoleucine
Threonine
U
asparagine
Serine
Isoleucine
Threonine
C
Glutamic acid
Glycine
Valine
Alanine
A
Glutamic acid
Glycine
Valine
Alanine
G
G
Aspartic acid
Glycine
Valine
Alanine
U
Aspartic acid
Glycine
Valine
Alanine
C
STOP codon
STOP codon
Leucine
Serine
A
U
STOP codon
Tryptophan
Leucine
Serine
G
Tyrosine
Cysteine
Phenylalanine
Serine
U
Tyrosine
Cysteine
Phenylalanine
Serine
C
Glutamine
Arginine
Leucine
Proline
A
C
Glutamine
Arginine
Leucine
Proline
G
Histidine
Arginine
Leucine
Proline
U
Histidine
Arginine
Leucine
Proline
C
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