Which statements are true about E.coli chromosomal DNA in relation with eukaryotic chromosomal DNA?
## Core Concept
The question compares the characteristics of E. coli chromosomal DNA, a prokaryote, with eukaryotic chromosomal DNA. E. coli has a single circular chromosome, while eukaryotes have multiple linear chromosomes. The key differences include the presence of histones, the structure (linear vs. circular), and the complexity of the DNA.
## Why the Correct Answer is Right
Eukaryotic chromosomal DNA is characterized by its linear structure, presence of histones, and organization into nucleosomes. In contrast, E. coli DNA is circular and lacks histones. The correct answer highlights these distinctions.
## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not accurately reflect the known differences between E. coli and eukaryotic chromosomal DNA.
- **Option B:** This option is incorrect as it also fails to accurately describe the relationship or differences.
- **Option C:** This option is incorrect because, similar to A and B, it does not correctly represent the distinctions.
- **Option D:** This option is incorrect as it is not specified as the correct answer.
## Clinical Pearl / High-Yield Fact
A key point to remember is that **E. coli DNA is supercoiled and circular**, existing as a single large molecule without histones, whereas eukaryotic DNA is linear, organized into multiple chromosomes, and complexed with histones to form chromatin.
## Correct Answer Line
**Correct Answer: C.**