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Select incorrect statement for DNA in ba...

Select incorrect statement for DNA in bacteria :

A

The length of the DNA strand may be about `2500-7000` times the length of the cell.

B

It is efficienty packed in the cell to fit within the nucleoid region.

C

The DNA is extensively looped and coiled with the help of nucleoid proteins.

D

Bacterial DNA is attached to cell membrane and the membrane may be involved in separation of dulicated DNA

Text Solution

AI Generated Solution

The correct Answer is:
To determine the incorrect statement regarding DNA in bacteria, we will analyze each of the provided statements step by step. ### Step 1: Analyze the First Statement - **Statement**: The length of DNA strand may be about 2500 to 7000 times the length of the cell. - **Evaluation**: This statement is incorrect. In bacteria, the DNA strand is approximately 23 times longer than the cell itself, not 2500 to 7000 times. Therefore, this statement is false. ### Step 2: Analyze the Second Statement - **Statement**: It is efficiently packed in the cell to fit within the nucleoid region. - **Evaluation**: This statement is correct. Bacterial DNA is indeed efficiently packed within the nucleoid region, which is a specific area in prokaryotic cells where the genetic material is located. ### Step 3: Analyze the Third Statement - **Statement**: The DNA is extensively looped and coiled with the help of nucleoid protein. - **Evaluation**: This statement is also correct. Bacterial DNA is looped and coiled due to the action of nucleoid-associated proteins (NAP), which help in compacting the DNA for efficient storage. ### Step 4: Analyze the Fourth Statement - **Statement**: A bacterial DNA is attached to the cell membrane and the membrane may be involved in separation or duplication of DNA. - **Evaluation**: This statement is correct as well. The bacterial DNA is indeed associated with the cell membrane, and this association can play a role in processes such as DNA replication and separation during cell division. ### Conclusion After analyzing all four statements, we find that the first statement is the only incorrect one regarding DNA in bacteria. ### Final Answer The incorrect statement for DNA in bacteria is: "The length of DNA strand may be about 2500 to 7000 times the length of the cell." ---
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