Bacterial pathogens can be controlled by

Lipase can only digest ......... .

Enzyme sucrase hydrolyses sucrose into

Assertion : Enzymes have active sites and substrates have reactive sites on their surface respectively.
Reason : Active and reactive sites push the enzyme and substrate molecules away from each other.

Enzymes generally have

$X$: All enzymes act in a unidirectional manner.
$Y$: All enzymes are amphoteric in nature.