Refer to the the table to answer the following questions.

-In the biosynthetic pathway for conversion from homoserine to methionine,you identify a Neurospora crassa double mutant Met1/Met2.This mutant will grow only if which supplement(s)are added to the minimal media?
A)homoserine only
B)cysteine only
C)homocysteine only
D)cystathionine and homocysteine
E)methionine only

Question

Refer to the the table to answer the following questions.
 
-In the biosynthetic pathway for conversion from homoserine to methionine,you identify a Neurospora crassa double mutant Met1/Met2.This mutant will grow only if which supplement(s)are added to the minimal media?
A)homoserine only 
B)cysteine only 
C)homocysteine only 
D)cystathionine and homocysteine 
E)methionine only

Quizplus · Accepted Answer

The double mutant Met1/Met2 is likely blocked at two steps in the methionine biosynthesis pathway. Therefore, it requires methionine, the end product of the pathway, to be supplemented in the media for growth.

Refer to the The Table to Answer the Following Questions