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Protein Synthesis Practice 1
PURPOSE
To review protein synthesis
PROCEDURE
Place the steps of protein synthesis in the correct order.
_____ DNA rejoins & mRNA leaves the nucleus
_____ the mRNA codons pair up with the tRNA anticodons; amino acids are added
_____ DNA unzips
_____ a mRNA copy of the DNA is made
_____ amino acids continue to be added until “stop” is reached.
_____ mRNA enters the ribosomes
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Directions
Use the DNA nitrogen bases below to determine the correct mRNA and tRNA sequence and the correct
amino acids.
SEQUENCE 1
DNA:
mRNA:
tRNA:
Amino Acid:
CTG – ATG – TGG – GCA – CAG – GTG – AAC – GTT
SEQUENCE 2
TAG – ATG – AGG – CGC – TTG – TAC – TGC – ATT
DNA:
mRNA:
tRNA:
Amino Acid:
SEQUENCE 3
CGT – GTT – ACC – TGT – AGC – TGC – AAG – TGC
DNA:
mRNA:
tRNA:
Amino Acid:
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How many amino acids would be made from the DNA segment below?
S
P
P S
C
T
P
S
P
A
G
A
S
S
T
P
S
P
S
P
S
G
G
C
C
S
P
S
P
P
S
P
S
P
S
C
A
A
G
T
T
S
P
S
P
S
P
S
P
G
C
P
S
P
S
P
S
P
S
C
A
A
G
T
T
S
P
S
P
S
P
P