A DNA sequence, 5 -A T G G A C G T G C T T C C C A A A G C A T C G G G C 3 , is mutated to obtain P. 5 -A T G G A C G T G C T T C a C A A A G C A T C G G G C 3 Q. 5 -A T G G A C G T G C T T C C C g A A A G C A T C G G G C 3 R. 5 -A T G G A C G T G C T T C C A A A G C A T C G G G C 3 S. 5 -A T G G A C G T G C T T C C C A A t G C A T C G G G C 3 T. 5 -A T G G A C G a G C T T C C C A A A G C A T C G G G C 3 [Point mutations are shown in the lower case or within the sequences] Which of the above mutant sequences DO NOT have frame-shift?

A DNA sequence, 5 -A T G G A C G T G C T T C C C A A A G C A T C G G G

1.	A DNA sequence, 5 -A T G G A C G T G C T T C C C A A A G C A T C G G G C 3 , is mutated to obtain P. 5 -A T G G A C G T G C T T C a C A A A G C A T C G G G C 3 Q. 5 -A T G G A C G T G C T T C C C g A A A G C A T C G G G C 3 R. 5 -A T G G A C G T G C T T C C A A A G C A T C G G G C 3 S. 5 -A T G G A C G T G C T T C C C A A t G C A T C G G G C 3 T. 5 -A T G G A C G a G C T T C C C A A A G C A T C G G G C 3 [Point mutations are shown in the lower case or within the sequences] Which of the above mutant sequences DO NOT have frame-shift?
A.	P, Q and S
B.	P, S and T
C.	Q, R and S
D.	Q, S and T
Answer» C. Q, R and S

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