Download code sequence practice

Code Sequence Practice
Name:
Replication – Making copies of DNA (forms complementary strands)
1. If this is your original DNA strand, what is its complementary strand?
Old DNA strand: A G C T A T G A C
New DNA strand:
Transcription – making mRNA from DNA
2. If this is your original DNA strand, what is the mRNA sequence that is synthesized?
DNA Strand: C A G T G C A T T
mRNA strand:
3. Now go backwards, if you are given the following mRNA strand, write the DNA strand that
goes with it.
mRNA strand: U C G A C C G A U
DNA strand:
Translation – making amino acid chains (proteins) from mRNA
4. If this is your mRNA sequence, use the chart at the side to find the amino
acid sequence
mRNA sequence: G U C A C G U A A
amino acids:
5. You are given a polypeptide with the following sequence of
amino acids: Glutamic Acid – Tyrosine – Serine – Aspartic Acid
Use the chart below to figure out which of the DNA choices could be
right. (This is a 2 step process)
Amino Acid
Corresponding Codes
Glutamic acid
GAA, GAG
Tyrosine
UAU, UAC
Serine
AGU, AGC
Aspartic Acid
GAU, GAC
A. GAAUAUAGUGAC
B. CTTCTCTCACTA
C. CTCATGTCGCTA