Question: A mutant plant with white flowers exists that lacks red
anthocyanin pigment, normally made by enz…
A mutant plant with white flowers exists that lacks red
anthocyanin pigment, normally made by enzyme P. Indeed the petal
tissue lacks all detectable activity for enzyme P. Despite the lack
of enzyme activity, a study of homozygous mutant cells using
antibodies against the wild-type enzyme demonstrated that the cells
homozygous for the mutation still had the enzyme (i.e., the
antibody showed the presence of the enzyme). Which statement below
could most likely explain these results?
A )The mutant had another gene the researcher was not aware of
which produced an enzyme that could function like the mutated
enzyme.
B)The mutant cells likely had large scale chromosomal mutations
that resulted in the expression of some gene similar to the gene
for enzyme P.
C)The mutant allele must have had a nonsense mutation that
resulted in complete formation of a non-functioning enzyme
D)The mutant allele must only have missense mutations that
simply knocked out enzyme function yet the enzyme would still bind
to the antibody
E) None of the answers is correct
