Use the following to answer questions :
Suppose that a wild-type bacterium can synthesize substance D,but various mutant strains cannot.We know that substance D is synthesized from substance X in a pathway that involves three intermediate substances (A,B,and C),but we do not know the order of the steps in the pathway.Below is a table of four different mutant strains that have been tested for their ability to grow on the various substances.The plus sign means that the strain can grow on that substance;the negative sign means that the strain cannot grow on that substance.
-According to the data above,what is the most likely order of the pathway?
A) A,B,C,D
B) A,C,B,D
C) B,A,C,D
D) C,B,A,D
E) C,A,B,D

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Use the following to answer questions :
Suppose that a wild-type bacterium can synthesize substance D,but various mutant strains cannot.We know that substance D is synthesized from substance X in a pathway that involves three intermediate substances (A,B,and C),but we do not know the order of the steps in the pathway.Below is a table of four different mutant strains that have been tested for their ability to grow on the various substances.The plus sign means that the strain can grow on that substance;the negative sign means that the strain cannot grow on that substance. 
-According to the data above,what is the most likely order of the pathway?
A) A,B,C,D 
B) A,C,B,D 
C) B,A,C,D 
D) C,B,A,D 
E) C,A,B,D

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The Answer of Use the following to answer questions :
Suppose that a wild-type bacterium can synthesize substance D,but various mutant strains cannot.We know that substance D is synthesized from substance X in a pathway that involves three intermediate substances (A,B,and C),but we do not know the order of the steps in the pathway.Below is a table of four different mutant strains that have been tested for their ability to grow on the various substances.The plus sign means that the strain can grow on that substance;the negative sign means that the strain cannot grow on that substance. 
-According to the data above,what is the most likely order of the pathway?
A) A,B,C,D 
B) A,C,B,D 
C) B,A,C,D 
D) C,B,A,D 
E) C,A,B,D

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