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Which of the following is incorrect for bacteria ? 1.Slime layer contains peptidoglycan 2.Central mesosomes help in holding the nucleoid 3.Teichoic acids are acidic polymers consisting of ribitol and glycerols 4.Chlorobium is photolithotrophic and green sulphur bacteria

A

Slime layer contains peptidoglycan

B

Central mesosomes help in holding the nucleoid

C

Teichoic acids are acidic polymers consisting of ribitol and glycerols

D

Chlorobium is photolithotrophic and green sulphur bacteria

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statement about bacteria is incorrect, we will analyze each option one by one. ### Step-by-Step Solution: 1. **Statement 1: Slime layer contains peptidoglycan.** - The slime layer is a protective layer found outside the cell wall of bacteria. It is primarily composed of polysaccharides, not peptidoglycan. Peptidoglycan is a component of the bacterial cell wall, but it is not found in the slime layer. Therefore, this statement is **incorrect**. 2. **Statement 2: Central mesosomes help in holding the nucleoid.** - Mesosomes are invaginations of the plasma membrane in bacteria. They play a role in various cellular processes, including the organization of the nucleoid (the region containing the bacterial chromosome). Thus, this statement is **correct**. 3. **Statement 3: Teichoic acids are acidic polymers consisting of ribitol and glycerols.** - Teichoic acids are indeed found in the cell walls of Gram-positive bacteria. They are composed of ribitol or glycerol phosphate and contribute to the structural integrity of the cell wall. Therefore, this statement is **correct**. 4. **Statement 4: Chlorobium is photolithotrophic and green sulfur bacteria.** - Chlorobium is a genus of green sulfur bacteria that utilize light for energy through photolithotrophy. This statement is also **correct**. ### Conclusion: After analyzing all the statements, the **incorrect statement** is: - **Statement 1: Slime layer contains peptidoglycan.**
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