Question

Match the following:

• A. A - II, B - III, C - IV, D - I, E - V
• B. A - IV, B - V, C - III, D - II, E - I
• C. A - II, B - IV, C - III, D - I, E - V
• D. A - II, B - V, C - IV, D - III, E - I

Hint:

Teichoic acid is a classic biomarker for Gram-positive bacterial cell walls, while O-antigens/LPS are diagnostic of Gram-negative bacteria. Identifying either of these immediately simplifies multi-list matching questions.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
This matching question covers structural and macromolecular components characteristic of different prokaryotic, eukaryotic, and symbiotic biological systems.
Understanding the composition of cell walls, surface antigens, locomotor organs, and symbiotic structures helps distinguish these groups.

Step 2: Detailed Explanation:
Let us analyze each pair in List I and List II:
A. O antigens (II. Gram Negative Bacteria):
O antigens (or O-specific side chains) are the outermost polysaccharide domain of lipopolysaccharides (LPS) found exclusively in the outer membrane of Gram-negative bacteria.
They play a major role in immunological specificity and protecting the bacterial cell from host defenses.
B. Teichoic acid (V. Gram Positive bacteria):
Teichoic acids are anionic polymers of glycerol phosphate or ribitol phosphate covalently linked to the peptidoglycan cell wall in Gram-positive bacteria.
They help regulate cell wall synthesis, contribute to chemical charge characteristics, and aid in cell division.
C. Pseudomurein (IV. Archaea):
Pseudomurein (also known as pseudopeptidoglycan) is a major cell wall component of some methanogenic Archaea.
It is chemically distinct from bacterial peptidoglycan because it contains L-amino acids instead of D-amino acids and is linked by \(\beta(1\rightarrow3)\) glycosidic bonds instead of \(\beta(1\rightarrow4)\) bonds.
D. Pseudopodia (III. Protozoa):
Pseudopodia are temporary cytoplasm-filled projections of eukaryotic cell membranes used by protozoans (like Amoeba) for locomotion and engulfing food particles.
E. Arbuscules (I. Mycorrhizae):
Arbuscules are highly branched, tree-like haustorial structures formed by arbuscular mycorrhizal (AM) fungi within the cortical cells of host plant roots.
These structures are the primary sites of nutrient exchange between the fungal partner and the host plant.
Combining these observations yields the match: A-II, B-V, C-IV, D-III, E-I.

Step 3: Final Answer:
Therefore, the correct match is A-II, B-V, C-IV, D-III, E-I.