Question

check out my youtube animations on enzymes!
enzymatic!
quiz!
click on the substrate(s) in the following diagram!
score: 50 %
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Explanation:

To solve this, we recall the concept of enzyme - substrate interaction:

• An enzyme (the orange shape here) acts on a substrate. The substrate is the molecule that binds to the enzyme's active site and is then converted into products.
• In the diagram, the green sphere that is approaching the enzyme (the orange structure) is the substrate. The green spheres moving away from the enzyme are the products, as they are the result of the enzyme - catalyzed reaction on the substrate.

So, we click on the green sphere that is about to bind to the enzyme (the one on the left - hand side of the enzyme in the diagram).

In enzyme - substrate reactions, the substrate is the molecule that binds to the enzyme's active site. In the given diagram, the green sphere approaching the orange enzyme (active site) is the substrate. The other green spheres are products. So we click on the green sphere near the enzyme (not the ones moving away).

Answer:

Click on the green sphere (substrate) that is approaching the orange enzyme (the one on the left of the enzyme structure).