Why are lysosomes commonly called
(i) 'suicidal bags' of the cells ?
(ii) 'natural scavengers and cellular housekeepers' ?

Explanation

(i) Lysosomes are spherical, tiny structures, each bounded by a unit membrane. Each lysosome contains hydrolytic (digestive) enzymes. Their membrane prevents the enzymes from escaping into the cytoplasm and destroy it. Therefore, lysosomes are also called 'suicidal bags'.
(ii) Lysosomes also removes the dead cells and debris that accumulate at the sites of injury by digesting them and thus make a way for their replacements. Thus, they are also called 'natural scavengers' and 'cellular housekeepers'.