00:01
In this video, we have a metabolic pathway that has three steps, and the intermediates are w, x, y, and z.
00:08
And the enzymes that catalyze the steps are a, b, and c.
00:13
We're given a list in order to determine the order of the pathway, so let's go ahead and start one by one.
00:19
First, an inhibitor of enzyme b causes z to build up.
00:22
So if b doesn't function, z builds up.
00:25
That lets us know that enzyme b is a later step than product z.
00:30
Two, an organism with a mutation in enzyme c requires y to grow.
00:38
So if we add y, that means that it's able to bypass the mutation in enzyme c, which tells us that enzyme c is catalyzing into product y, or something after that, but c is going to come before y.
00:57
Three, an inhibitor of enzyme a causes w, y, and z to build up.
01:03
So w, y, and z all are going to come before enzyme a catalyzing into some product...