Review And Practice: Protein Synthesis - Westgate Mennonite Collegiate
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Review and Practice: Protein Synthesis
Part 1. Practicing translation
1. Which amino acids do the following mRNA
sequences code for?
G G C
U A C A C G
C A G
U A U A C G
U A G
U A G A C G
2. Which amino acids do the following DNA
sequences code for?
T A C
A A T
T C A
G G C T A C
3. What sequence of mRNA could code for the
following amino acids? (Give one possibility)
Cysteine
Tyrosine
Stop
4. What sequence of DNA could code for the following amino acids? (Give one possibility)
Arginine
Tryptophan
Stop
Part 2. How DNA controls the workings of the cell
Below are two partial sequences of DNA bases. Sequence 1 is from a human, and sequence 2 is
from a cow. In both humans and cows, the sequence contains the gene to make the protein insulin.
Insulin is necessary for the uptake of sugar form the blood. Without insulin, a person cannot
digest sugars the same way others can, and they have a disease called diabetes.
Using the DNA sequence, make a complimentary mRNA strand for both the human and the cow.
Write the mRNA directly below the DNA strand (remember to substitute Us for Ts in mRNA). Use
a codon chart to determine what amino acids are assembled to make the insulin protein in both
the cow and the human. Write your amino acid chain directly below the RNA sequence.
Table 1: Human insulin protein sequence
DNA
C C A T A G C A C G T T A C A A C G T G A A G G T A A
Sequence
mRNA
Amino Acids
Table 2: Cow insulin protein sequence
DNA
C C G T A G C A T G T T A C A A C G C G A A G G C A C
Sequence
mRNA
Amino Acids
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