W, X, and Y are the intermediates (in that order) in abiochemical pathway whose product is Z. Z− mutantsare found in five different complementation groups.Z1 mutants will grow on Y or Z, but not W or X. Z2mutants will grow on X, Y, or Z. Z3 mutants will onlygrow on Z. Z4 mutants will grow on Y or Z. Finally,Z5 mutants will grow on W, X, Y, or Z.a. Order the five complementation groups in terms ofthe steps they block.b. What does this genetic information reveal aboutthe nature of the enzyme that carries out theconversion of X to Y?

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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W, X, and Y are the intermediates (in that order) in a
biochemical pathway whose product is Z. Z− mutants
are found in five different complementation groups.
Z1 mutants will grow on Y or Z, but not W or X. Z2
mutants will grow on X, Y, or Z. Z3 mutants will only
grow on Z. Z4 mutants will grow on Y or Z. Finally,
Z5 mutants will grow on W, X, Y, or Z.
a. Order the five complementation groups in terms of
the steps they block.
b. What does this genetic information reveal about
the nature of the enzyme that carries out the
conversion of X to Y?

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