<P> By scientific convention , the term lysosome is applied to those vesicular organelles only in animals , and vacuoles to plants , fungi and algae . Discoveries in plant cells since the 1970s started to challenge this definition . Plant vacuoles are found to be much more diverse in structure and function than previously thought . Some vacuoles contain their own hydrolytic enzymes and perform the classic lysosomal activity , which is autophagy . These vacuoles are therefore seen as fulfilling the role of the animal lysosome . Based on de Duve 's description that `` only when considered as part of a system involved directly or indirectly in intracellular digestion does the term lysosome describe a physiological unit '' , some botanists strongly argued that these vacuoles are lysosomes . However , this is not universally accepted as the vacuoles are strictly not similar to lysosomes , such as in their specific enzymes and lack of phagocytic functions . Vacuoles do not have catabolic activity and do not undergo exocytosis as lysosomes do . </P>
<P> By scientific convention , the term lysosome is applied to those vesicular organelles only in animals , and vacuoles to plants , fungi and algae . Discoveries in plant cells since the 1970s started to challenge this definition . Plant vacuoles are found to be much more diverse in structure and function than previously thought . Some vacuoles contain their own hydrolytic enzymes and perform the classic lysosomal activity , which is autophagy . These vacuoles are therefore seen as fulfilling the role of the animal lysosome . Based on de Duve 's description that `` only when considered as part of a system involved directly or indirectly in intracellular digestion does the term lysosome describe a physiological unit '' , some botanists strongly argued that these vacuoles are lysosomes . However , this is not universally accepted as the vacuoles are strictly not similar to lysosomes , such as in their specific enzymes and lack of phagocytic functions . Vacuoles do not have catabolic activity and do not undergo exocytosis as lysosomes do . </P>
what reactions are performed by hydrolytic enzymes in the lysosome
what reactions are performed by hydrolytic enzymes in the lysosome
autophagy
autophagy