Question

Match the following:

List I	List II
A. Biofilm --- IV. A layer of organic matter and microorganisms formed by the attachment and proliferation of bacteria B. Glycocalyx --- I. Bacterial extracellular polymer that creates a visible slimy layer on solid surface C. Red tides --- III. Algal bloom composed of red pigmented dinoflagellates D. Coliform bacteria --- II. Gram negative non spore forming Bacilli usually found in the intestine	IV. A layer of organic matter and microorganisms formed by the attachment and proliferation of bacteria I. Bacterial extracellular polymer that creates a visible slimy layer on solid surface III. Algal bloom composed of red pigmented dinoflagellates II. Gram negative non spore forming Bacilli usually found in the intestine

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

Hint:

Biofilm $\neq$ Glycocalyx: biofilm is a community; glycocalyx is the individual bacterial polysaccharide coat.

Answer 1

The Correct Option is D

Step 1: Concept
Definitions of biofilm, glycocalyx, red tides, and coliform bacteria.

Step 2: Meaning
Matching microbial and ecological terms with their precise definitions.

Step 3: Analysis
Biofilm (A): Community of microorganisms attached to a surface, embedded in organic matrix --- matches IV.
Glycocalyx (B): Bacterial extracellular polysaccharide forming a visible slimy layer --- matches I.
Red tides (C): Harmful algal blooms of red-pigmented dinoflagellates --- matches III.
Coliform bacteria (D): Gram-negative, non-spore-forming, rod-shaped bacteria from the intestine (e.g. E. coli) --- matches II.

Step 4: Conclusion
Correct matching: A-IV, B-I, C-III, D-II. Final Answer: (D)