Bacterial cell wall is a rigid wall that maintains the structural component of the cell. Which of the following statement is correct?

Question

Bacterial cell wall is a rigid wall that maintains the structural component of the cell. Which of the following statement is correct?

BlackTom AI · Accepted Answer

Question focus: understanding which statement about bacterial cell walls is correct among the given options.
Option 1: 'All microorganisms contain a cell wall with the exception of L-forms, mycoplasma, and certain protozoa.' This aligns with established microbiology: mycoplasmas lack a typical peptidoglycan cell wall, L-forms are wall-deficient variants, and some protozoa (particularly certain amoebae and other forms) may not possess a rigid cell wall. Thus, this statement captures the known exceptions and is conceptually accurate.
Option 2: 'All microorganisms contain a cell wall with the exception of L-forms and yeast (L-forms, mycoplasma, and certain protozoa.)' This is incorrect because yeast actually have robust cell walls (primarily made of polysaccharides like glucan and chitin). The parenthetical list also overlaps with the first clause in a way that makes the sentence internally inconsistent, weakening accuracy.
Option 3: 'Functions of cell wall rupture, provide solid support for the flagella, and Pilli in fungi' This mixes up roles and taxa. In bacteria, the cell wall contributes to structural integrity but not specifically to supporting flagella or pili; in fungi, pili are not a typical feature, and flagella (when present) are structurally based on basal bodies and cytoskeletal elements, not cell wall rupture. Overall, this statement conflates features across organisms and is factually inaccurate about fungal biology and the role of the cell wall.
Option 4: 'Cell wall accounts 20-40% of bacteria wet weight.' This numerical claim is not universally fixed; cell wall proportion can vary among species and conditions, and providing a fixed percentage (20-40%) is oversimplified and not reliably accurate across bacteria. Therefore, this option is dubious.
In summary, option 1 presents a correct generalization about the presence of cell walls in most microorganisms and the well-known exceptions (L-forms, mycoplasma, and certain protozoa), while the other options contain factual inaccuracies or misleading statements about cell wall composition, function, or taxonomic implications.

Bacterial cell wall is a rigid wall that maintains the structural component of the cell. Which of the following statement is correct?

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