英语翻译

英语翻译
several mutants are isolated,allof which require com-pound G for growth.The compounds (A to E) in the biosymthetic pathway to G ate known,but their order in the pathway is not known.Each compound id tested for its ability to support the growth of each mutant(1 to 5).In the following table,a plus sign indicates growth and a minus dign indicates no growth.
a.what is the order of compounds A to E in the pathway?
b.At which point in the pathway is each mutant blocked?
c.would a heterolaryon composed of double mutants 1,3 and 2,4 grow on a minimal mediUm?Would 1,3 and 3,would 1,2 and 2,4 and 1,