Question

1. a) explain what would happen if a substrate molecule with a different shape to the enzyme came into contact with the enzymes active site.

Explanation:

Enzymes are highly specific in their action. Their active sites are designed to fit specific substrate molecules (lock - and - key model). If a substrate with a different shape comes into contact with the active site, it won't fit properly. This means no enzyme - substrate complex will form. As a result, no reaction will occur.

Answer:

The substrate molecule will not bind to the enzyme's active site. No enzyme - substrate complex will be formed, and thus no reaction will take place.