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Delicious77 [7]
3 years ago
15

You are studying a biochemical pathway and isolate mutants I, II, and III. Mutant I can grow if you supplement the medium with Z

. Mutant II can grow if you supplement the medium with X, Y, or Z. Mutant III can grow if you supplement the medium with X and Z, but not if you supplement the medium with Y. What is the order of X, Y, and Z in this biochemical pathway?
a) X, Y, Z
b )Y, Z, X
c) Z, X, Y
d) Y, X, Z
e) X, Z, Y
Biology
1 answer:
bekas [8.4K]3 years ago
4 0

Answer:

d) Y, X, Z

Explanation:

Mutant I only grows when the medium is supplemented with Z. So Z is the final product of biochemical pathway since supplying other intermediates do not lead to any growth.

Mutant III can grow if medium is supplemented with X and Z but not with Y. This means that Y is the first intermediate in this pathway since mutant III is not able to convert it into X and hence needs to be supplemented with next intermediate product X for growth.

Hence the correct order of X, Y and Z in this biochemical pathway is Y, X, Z.

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