Which of the following statements is incorrect regarding the structure of a typical bacterial cell?

Options

A. Cell possess naked circular DNA which is folded to form nucleoid.
B. Cell are surrounded by a peptidoglycan cell wall and a mucilaginous sheath.
C. Cells possess well developed membrane bound cell organelles.
D. Ribosomes in these cells are 70S is nature.

Explanation

To determine which statement is incorrect regarding the structure of a typical bacterial cell, we can analyze each statement provided:

1. **Statement 1**: "Cell possess naked circular DNA which is folded to form nucleoid."
- Bacterial cells do indeed possess a single, circular DNA molecule that is not enclosed within a membrane-bound nucleus. This DNA is referred to as the nucleoid. Therefore, this statement is correct.

2. **Statement 2**: "Cells are surrounded by the peptidoglycan cell wall and a mucilaginous sheath."
- Bacterial cells are typically surrounded by a cell wall made of peptidoglycan, which provides structural support and protection. Some bacteria may also have a mucilaginous sheath (capsule) outside the cell wall. Thus, this statement is also correct.

3. **Statement 3**: "Cells possess well-developed membrane-bound cell organelles; ribosomes in these cells are 70s in nature."
- Bacterial cells are prokaryotic, meaning they lack membrane-bound organelles. They do have ribosomes, but they are not considered membrane-bound organelles. The ribosomes in bacteria are indeed 70S, but the statement about possessing well-developed membrane-bound organelles is incorrect.

Based on this analysis, the incorrect statement regarding the structure of a typical bacterial cell is:

**Answer**: "Cells possess well-developed membrane-bound cell organelles."