Question

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

• A. Lysosomes are double membraned vesicles budded off form Golgi apparatus and contain digestive enzymes.
• B. Endoplasmic reticulum consists of a network of membranous tubules and helps in transport, synthesis and secretion.
• C. Leucoplasts are bound by two membranes lack pigment but contain their own DNA and protein synthesizing machinery.
• D. Spherosomes are single membrane bound and are associated with synthesis and storage of lipids.

Answer 1

Answer: (A)

Lysosomes are double membraned vesicles budded off form Golgi apparatus and contain digestive enzymes.

Spherosomes also referred to as lipid bodies or oleosomes, are vesicles that stores triacylglycerol in the form of oil (during seed development).

Leucoplasts are the colourless plastid and as such are organelles found in plant cells. They are bound by two membranes. They contain their own DNA and protein synthesizing machinery like chloroplasts.

The endoplasmic reticulum (ER) is a type of organelle in the cells of eukaryotic organisms that forms an interconnected network of flattened, membrane-enclosed sacs or tubes known as cisternae which heIps in transport, synthesis and secretion.

A lysosome is a single membrane-bound cell organelle found in most animal cells containing hydrolytic enzymes. The enzymes of the lysosomes are synthesised in the rough endoplasmic reticulum. The enzymes are released from Golgi apparatus in small vesicles which ultimately fuse with acidic vesicles called endosomes, thus becoming full lysosomes. Thus, the correct answer is option A.