Class 11 · Cell: The Unit of Life

Mesosomes: Structure & Functions — NEET Biology

✅ Asked in NEET 2024
📖 NCERT Source

A special membranous structure is the mesosome which is formed by the extensions of plasma membrane into the cell. These extensions are in the form of vesicles, tubules and lamellae. They help in cell wall

NCERT Biology · Class 11 · Chapter 8 · Paragraph 24
How NTA Uses This Concept

Mesosomes are infoldings of the bacterial plasma membrane that form vesicles, tubules, and lamellae structures. NTA tests this because mesosomes play crucial roles in cell wall formation and DNA replication in prokaryotes. Students often confuse mesosomes with mitochondria or overlook their importance in prokaryotic cells, thinking they're insignificant. Remember: mesosomes are prokaryote-specific structures that increase surface area for metabolic activities and assist in DNA replication and chromosome segregation during cell division. They're particularly important in bacteria and cyanobacteria—not found in eukaryotes.

Solve This NEET Question

This paragraph was tested 3 times in NEET.

Q1 of 3NEET 2024

Cell wall formation in bacteria is facilitated by:

Q2 of 3NEET 2024

Mesosome in a cell is a: NEET 2024

Q3 of 3NEET 2023

Given below are two statements: Statement I: In bacteria, the mesosomes are formed by extensions of the plasma membrane. Statement II: The mesosomes in bacteria help in DNA replication and cell wall formation. NEET 2023

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