Non Dividing bacteria have ..... chromosome and may have extra circles of ……... called plasmids.
(a) one, RNA
(b) one, DNA
(c) two, RNA
(d) two, DNA

Options

A. one, RNA
B. one, DNA
C. two, RNA
D. two, DNA

Explanation

To solve the question, we need to analyze the characteristics of non-dividing bacteria in terms of their genetic material. Here’s a step-by-step breakdown:

### Step 1: Understanding Bacterial Chromosomes
- Non-dividing bacteria typically have a single chromosome. This chromosome is a single, circular DNA molecule that contains the genetic information necessary for the bacterium's functions and reproduction.

### Step 2: Identifying the Type of Chromosome
- In bacteria, the chromosome is not enclosed within a nuclear membrane, which is a characteristic feature of prokaryotic cells. This single chromosome is referred to as chromosomal DNA.

### Step 3: Understanding Plasmids
- In addition to the main chromosome, many bacteria also contain plasmids. Plasmids are small, circular pieces of DNA that exist independently of the chromosomal DNA. They can carry additional genes that may provide advantages, such as antibiotic resistance.

### Step 4: Filling in the Blanks
- Based on the understanding from the previous steps, we can fill in the blanks in the question:
- Non-dividing bacteria have **one** chromosome (the single circular DNA).
- They may have extra circles of **DNA** (the plasmids).

### Conclusion
- Therefore, the correct answer is:
- (b) one, DNA

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