Question

Match the following:

List-I	List-II
A. Cell wall lacks pectin	I. Eubacterium
B. Cell wall with polysulphate esters	II. Laminaria
C. Cell wall with chitin	III. Polysiphonia
D. Cell wall with murin	IV. Neurospora
	V. Mycoplasma

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

Hint:

Murin = Bacteria, Chitin = Fungi, Sulphated polysaccharides = Red algae, Algin = Brown algae.

Answer 1

The Correct Option is A

Concept: Different groups of organisms possess characteristic cell wall compositions. Cell wall constituents are important taxonomic characters used in classification.

Step 1: Identify organism lacking pectin-rich cell wall. Laminaria is a brown alga whose cell wall mainly contains cellulose and algin. Pectin is absent. Therefore: \[ A \rightarrow II \]

Step 2: Identify cell wall containing polysulphate esters. Red algae such as Polysiphonia possess sulphated polysaccharides in their cell wall. Therefore: \[ B \rightarrow III \]

Step 3: Identify cell wall containing chitin. Chitin is the characteristic component of fungal cell walls. Neurospora is a fungus. Therefore: \[ C \rightarrow IV \]

Step 4: Identify cell wall containing murin. Murin or peptidoglycan is present in eubacterial cell walls. Therefore: \[ D \rightarrow I \]

Step 5: Final matching. \[ A-II,\quad B-III,\quad C-IV,\quad D-I \] Thus option (A) is correct.