LS4 Week7Quiz

LS4 Week7Quiz - and so that they line up under the...

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Question Completion Status: Question 1 10 points Save Multiple mutants of Neurospora crassa were identified as His auxotrophs. There are 4 known intermediates in the His biosynthesis pathway but their order is unknown. Each compound is tested for its ability to support the growth of the following mutants (1-5). A plus (+) indicates growth on minimal medium supplemented with the compound listed and a minus (-) indicates no growth was observed. A B C D His 1 - + - - + 2 - - - - + 3 + + - + + 4 + + - - + 5 + + + + + (If the spacing of the above table appears off, the growth and no growth indications are still in the correct order for each mutant. Please re-write the +
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Unformatted text preview: and - so that they line up under the appropriate intermediate.) What is the intermediate just before His in this pathway? What mutant carries a mutation in the gene whose product catalyzes the intermediate in Question A to His? Which mutant demonstrates the earliest block in this biosynthetic pathway? What intermediate directly follows compound D in this pathway? What is the first intermediate in the pathway listed in the table above? A. 1 B. 2 C. 3 D. 4 E. 5 F. A G. B H. C I. D J. His...
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LS4 Week7Quiz - and so that they line up under the...

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