Question

Identify the correct statements about mutations. Choose all that apply. A. An individual with PKU would need to take a supplement of phenylalanine since they are missing the enzyme that synthesizes phenylalanine from metabolic precursors. The number of mutations resulting from the incorporation of incorrect bases during DNA replication is reduced through the use of a 3'-51 exonuclease. Cells with wild-type copies of CFTR are likely to have a lower concentration of Cl- than cells with mutated copies of CFTR. An in-frame removal of three nucleotides in a protein coding gene leads to a change in the reading frame of the resulting mRNA. You may select zero, one, or many answers.

Answer 1

B. The number of mutations resulting from the incorporation of incorrect bases during DNA replication is reduced through the use of 3'-5' exonuclease.

C. Cells with wild type copes of CFTR are likely to have a lower concentration of Cl- than cells with mutated copies of CFTR.