EK Biology (1001) Q165

[daFendi]

Hey guys, so the question asks
which of the following will not cause a shift in reading frame
and answers B (2 altered base pairs) and C (3 deleted base pairs) both are correct...but they say that B is the correct choice. Is this just a mistake on part of the EK question authors, or am i missing something?
Cause C is an in-frame mutation which does not result in a shift in reading frame.
Cheers

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[BestDoctorEver]

Hey guys, so the question asks
which of the following will not cause a shift in reading frame
and answers B (2 altered base pairs) and C (3 deleted base pairs) both are correct...but they say that B is the correct choice. Is this just a mistake on part of the EK question authors, or am i missing something?
Cause C is an in-frame mutation which does not result in a shift in reading frame.
Cheers

There was thread about this question....Here is the link

http://forums.studentdoctor.net/showthread.php?t=529967

 

[Perpetually]

If you alter base pairs, you simply replace them with both base pairs. You do not remove or add any nucleotides into the sequence. Thus you do not induce a frame shift.