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BREAKING THE CODE
(1) DNA REPLICATION
For each of the three DNA sequences below, write the sequence of the
complementary strand of DNA that results after replication.
DNA molecule #1:
TAC - CGG - ATG - CCA - GAT - CAA - ATC
Complementary DNA #1____________________________________________
DNA molecule #2:
TAC - GGG - GGC - GTA - ACC - ACA - ACT
Complementary DNA #2____________________________________________
DNA molecule #3:
TAC - CTG - TTA - AGC - TAC - AAA - ATT
Complementary DNA #3____________________________________________
(2) PROTEIN SYNTHESIS
There are two steps in protein synthesis
(A) TRANSCRIPTION (______________________________________)
(B)
TRANSLATION (_______________________________________)
(A) TRANSCRIPTION (occurs where? ________________)
For each of the same DNA sequences below, write the sequence of messenger
RNA codons that is synthesized during transcription. Be sure to separate the
codons into triplets.
DNA molecule #1: TAC - CGG - ATG - CCA - GAT - CAA - ATC
mRNA #1 _______________________________________________________
DNA molecule #2: TAC - GGG - GGC - GTA - ACC - ACA - ACT
mRNA #2________________________________________________________
DNA molecule #3: TAC - CTG - TTA - AGC - TAC - AAA - ATT
mRNA #3________________________________________________________
(B) TRANSLATION (occurs where? ________________) (not on regents)
For each of the mRNA codon sequences you have written, determine the
sequence of tRNA anticodons that match it.
Anticodons for mRNA #1: ___________________________________________
Anticodons for mRNA #2: ___________________________________________
Anticodons for mRNA #3: ___________________________________________
(B) TRANSLATION Cont This part comes up often on REGENTS EXAM;
Using the chart below, write the amino acid sequence coded for by each mRNA.
(Note: The code is based on mRNA codons, not tRNA anticodons.)
Polypeptide #1: __________________________________________________
Polypeptide #2: __________________________________________________
Polypeptide #3: __________________________________________________
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