Question

enzymes: denaturation
denaturation can impact enzyme function lets take a look at what this is

1. drag & drop the

substrate molecules
to the active sites
of each enzyme.

1. was the substrate able to bind to the active site of the denatured

enzyme? why/why not?

1. use the diagrams and your knowledge of protein structure to describe

what denaturation of enzymes is and its impact on enzyme function.

Explanation:

1. For the first part, based on the lock - and - key model of enzyme - substrate interaction, the substrate molecule (pink shape) should be dragged to the active site of the normal enzyme (the yellow - lined C - shaped part of the blue enzyme).
2. For the second question, the substrate was not able to bind to the active site of the denatured enzyme. This is because the denaturation of the enzyme causes a change in the shape of the active site. Enzymes work based on the complementary shape between the active site and the substrate (lock - and - key or induced fit model). When the active site shape is altered (as in the denatured enzyme), the substrate (which has a specific shape) can no longer bind.
3. Denaturation of enzymes is the disruption of the enzyme's three - dimensional (tertiary and sometimes quaternary) structure. This disruption is often caused by factors such as high temperature, extreme pH, etc. Enzymes are proteins, and their function is highly dependent on their structure. The active site, which is crucial for binding the substrate and catalyzing the reaction, is part of this three - dimensional structure. When denaturation occurs, the active site changes shape. As a result, the substrate can no longer bind effectively (as seen in the comparison between the normal and denatured enzyme in the diagram), and the enzyme loses its catalytic function.

Answer:

1. Drag the pink substrate molecule to the yellow - lined C - shaped active site of the normal enzyme.
2. No. Because denaturation changes the shape of the enzyme's active site, and the substrate and active site are no longer complementary in shape.
3. Denaturation is the disruption of an enzyme's three - dimensional (tertiary/quaternary) structure. It changes the active site shape, so the substrate cannot bind, and the enzyme loses its catalytic function.