Maximum number of bases in plasmids is

Options

A. 50 kilo base
B. 500 kilo base
C. 5000 kilo base
D. 50,000 kilo base

Explanation

To determine the maximum number of bases in plasmids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand what plasmids are**: Plasmids are small, circular, double-stranded DNA molecules found in bacteria and some eukaryotes. They are separate from chromosomal DNA and can replicate independently.

2. **Know the size range of plasmids**: Plasmids vary in size, typically ranging from about 1000 base pairs (1 kilobase) to several hundred kilobases.

3. **Identify the maximum size**: Research indicates that the largest known plasmids can reach up to 500 kilobases in size. This is the upper limit for plasmids.

4. **Evaluate the options provided**: The options given are:
- A) 50 kilobase
- B) 500 kilobase
- C) 5000 kilobase
- D) 50,000 kilobase

5. **Select the correct answer**: Based on the information that the maximum number of bases in plasmids is around 500 kilobases, the correct option is B) 500 kilobase.

### Final Answer:
The maximum number of bases in plasmids is **B) 500 kilobase**.

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