Question

All the following statements regarding cell organelles are correct, except

• A. lysosomes are single-membrane vesicles budded off from 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 a single membrane, lack pigment but contain their own DNA and protein-synthesizing machinery.
• D. sphaerosomes are single membrane-bound and are associated with synthesis and storage of lipids.

Answer 1

Answer: (C)

Plastids are double membranous structures. Plastids are of three types: Chloroplast, leucoplast, chromoplast.
Chloroplasts contain its own DNA protein-synthesising machinery.
Leucoplast are of three types: amyloplast, proteinoplast and elaioplast. Amyloplasts can synthesize and store starch. Proteinoplasts store proteins but can not synthesise. Elaioplasts store lipids.
Leucoplasts are colourless plastids which generally occur near the nucleus in non-green cells and possess internal lamellae.