Dna Protein Synthesis Recombinant Dna Test Page 2
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4DNA, Protein Synthesis and Recombinant DNA
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6.
a) Given the DNA sequence CAC GTA TGC AAA ATT, use the table above to describe the primary
structure of the protein it would transcribe. Valine –histidine- threonine-phenylalanine
b) A strand of DNA has the following bases: CACGGCC
CCG GCC
If the adenine base was deleted, which amino acids would be coded for?
A. valine, proline
B. glycine, alanine
C. proline, arginine
D. glycine, arginine
c) Determine the sequence of amino acids produced by this DNA sequence: GGA GTT TTC
A. Proline, Valine, Lysine.
B. Glycine, Valine, Leucine.
C. Proline, Glutamine, Lysine.
D. Glycine, Glutamic acid, Leucine.
d) A tRNA molecule with the anticodon GCU would be carrying the amino acid
A. valine.
B. alanine.
C. tyrosine.
D. arginine.
e) If the code for an amino acid is AGC on the DNA molecule, the anticodon on the tRNA would be
A. AGC
B. TGC
C. UCG
D. UGC
f) If the triplet code on a DNA molecule changes from ACT to AGC, the result is called
A. mutation.
B. metastasis.
C. translation.
D. transcription.
g) Read the strand of DNA from left to right: T G A G C G C C T A A A A T T
i) Give the order of the bases in the m-RNA strand that would be transcribed from the above section of
DNA. (1 mark)
ACU CGC GGA UUU UAA
ii)
Give the sequence of amino acids in the protein molecule that is synthesized from the above
sequence of DNA. (2 marks)
Threonine – arginine – glycine - phenylalanine
iii)
If the underlined base C is deleted, what effect will this have on the protein being synthesized?
(1 mark)
This would result in a frame shift mutation and all the amino acids after threonine would
be altered
the protein would not function
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