Question

Imagine you do a version of the Beadle-Tatum experiment in which you attempt to test the one-gene, one-enzyme hypothesis, but using the pathway of synthesis of amino acid Q from X (below). The reactions, in order, are catalyzed by enzymes E1-E5. X is always present in cells, and cells need Q to grow. E1 E2 E3 E4 E5 - xty 2 z 3 photo You identify a mutant strain that doesn't grow in normal medium, but does grow in medium supplemented with Q, indicating that it has a defect in one or more enzymes in this pathway. This strain is also able to grow if you supplement the medium with D. Which enzymes can you say with certainty are still functional (i.e. not disrupted by the mutation)? NOTE: THIS IS A MULTIPLE ANSWER QUESTION, SO SELECT ALL THAT APPLY! OOOOO All of them None of them

Answer 1

It is given that the organism is grown in presence of Q compound in the media. It is also able to grow in presence of compoundD. This suggests that E5 enzyme is functional in nature. Because D is converted into Q in the presence of enzyme E5. The other enzyme can not be found whether they are still functional or not.

That's why answer is : E5