The following question refers to this figure of a simple metabolic pathway:

-According to Beadle and Tatum's hypothesis, how many genes are necessary for this pathway?
A) 0
B) 1
C) 2
D) 3
E) It cannot be determined from the pathway.

Question

The following question refers to this figure of a simple metabolic pathway:
 
-According to Beadle and Tatum's hypothesis, how many genes are necessary for this pathway?
A) 0 
B) 1 
C) 2 
D) 3 
E) It cannot be determined from the pathway.

Quizplus · Accepted Answer

Beadle and Tatum's hypothesis states that one gene is responsible for one enzyme. In this pathway, there are two enzymes, so two genes are necessary.

The Following Question Refers to This Figure of a Simple