lactase
lactase
Lactose intolerance is the inability to efficiently convert lactose into glucose and galactose, a reaction catalyzed by the enzyme lactase. (A rule of thumb for enzyme nomenclature is that many enzyme names typically take most of the name of their substrate and slap an "-ase" at the end.)
Amylase speeds up the breakdown of sucrose.
The enzyme responsible for gelatin hydrolysis is gelatinase.
Modern enzymes are usually named by incorporating the name of the polymer hydrolyzed and the suffix "-ase". So following those rules, the enzyme that breaks down lactose is lactase.
Any enzyme has -ase at the end of it's name. The first part of the name is what it acts on or what its' substrate is. Lact- means milk sugar. This enzyme breaks down milk sugar (lactose) into simpler sugars that can be absorbed by the body. Some people are lacking in the enzyme (they don't make it) and are said to lactose intolerant. The two sugars are used by the cell for energy.
Digestive system
-ase is a common suffix used to name various enzymes. So, as an example, a nuclease is an enzyme that cleaves nucleic acids and a telomerase is an enzyme that extends the telomeres. Both produce different outcomes yet both end with -ase.
The enzyme amylase is a biological catalyst found in saliva. It catalyzes the breakdown of starch. Note that not everyone secretes the enzyme amylase in their saliva.
Enzymes are named by the reaction it catalyzes.
-ose, as in fructose, glucose, lactose, etc.
It breaks down lactose, and -ase is a common ending of enzyme names coming, ultimately, from the term lysis, which means "to break apart". So it's a nearly perfect name.