In bacterial cell, DNA is extensively looped and coiled with the help of
(a) Acid proteins
(b) Histones
(c) Basic nucleoid protein called as polyamines
(d) Actin

Options

A. Acid proteins
B. Histones
C. Basic nucleoid protein called as polyamines
D. Actin

Answer

To solve the question regarding how DNA is looped and coiled in bacterial cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Bacterial DNA**:
- Bacterial DNA is typically found in a region called the nucleoid. Unlike eukaryotic cells, bacteria do not have a defined nucleus.

2. **Identify the Nature of Bacterial DNA**:
- The DNA in bacteria is usually double-stranded and circular in shape. This structure requires specific proteins to help organize and compact the DNA.

3. **Consider the Options Given**:
- (a) Acid proteins: These are not typically involved in DNA coiling.
- (b) Histones: While histones are proteins that help in DNA packaging in eukaryotes, bacteria do not use histones for DNA organization.
- (c) Basic nucleoid protein called polyamines: This option suggests that these proteins are involved in the coiling and looping of bacterial DNA, which aligns with what is known about bacterial DNA organization.
- (d) Actin: Actin is a protein involved in cell structure and movement, not in DNA coiling.

4. **Select the Correct Answer**:
- Based on the understanding that bacterial DNA is looped and coiled with the help of basic nucleoid proteins known as polyamines, we can conclude that option (c) is the correct answer.

### Final Answer:
(c) Basic nucleoid protein called as polyamines

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