Question
Biology Question on Cell: the unit of life
Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?
Lysosomes are double membraned vesicles budded off from Golgi apparatus and contain digestive enzymes
Endoplasmic reticulum consists of a network of membranous tubules and helps in transport, synthesis and secretion
Leucoplasts are bound by two membranes, lack pigment but contain their own DNA and protein synthesizing machinery
Sphaerosomes are single membrane bound and are associated with synthesis and storage of lipids
Lysosomes are double membraned vesicles budded off from Golgi apparatus and contain digestive enzymes
Solution
Double membranes are absent in lysosomes. They are enclosed by single lipoproteinaceous unit membrane. Lysosome is called 'suicidal bag' of the cell due to presence of hydrolytic enzymes.