Question

Which statement is incorrect regarding Mesosome?

• A. Present both in Prokaryotes and Eukaryotes
• B. It is the infoldings of Plasma membrane
• C. Found in the form of vesicles, tubules and lamellae
• D. Help in DNA replication and its distribution

Answer 1

Answer:

A. Present both in Prokaryotes and Eukaryotes

• Mesosomes are specialized invaginations or foldings of the plasma membrane in prokaryotic cells (bacteria), which extend into the cytoplasm.

• Historical Context: First described by F. James and A. T. G. (1953), they were initially hypothesized to be functional organelles analogous to mitochondria in eukaryotic cells.

• Modern Scientific Consensus: Extensive studies using electron microscopy have confirmed that mesosomes are primarily artifacts of preparation. They arise due to the chemical fixation processes involved in preparing samples for electron microscopy, rather than existing as permanent, active structures in living bacteria.