Question

Choose the incorrect statement about mesosomes.

• A. Mesosomes are specialized membranous structures which are formed by the extensions of the cell membrane.
• B. They have a prominent role in cell wall formation and DNA replication.
• C. They are found as chromatophores in the cytoplasm of some prokaryotes, like cyanobacteria.
• D. They help in several secretion processes and enzymatic content.

Answer 1

Answer: (C)

A special membranous structure is the mesosome which is formed by the extensions of the plasma membrane into the cell. These extensions are in the form of vesicles, tubules and lamellae. They help in cell wall formation, DNA replication and distribution to daughter cells. They also help in respiration, secretion processes, to increase the surface area of the plasma membrane and enzymatic content. In some prokaryotes like cyanobacteria, there are other membranous extensions into the cytoplasm called chromatophores which contain pigments.