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Question
The structure of E.coli chromosomal DNA is
The structure of E.coli chromosomal DNA is
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Solution
The correct option is D Double stranded, right handed and circular
The DNA of the bacteria is covalently circular. It forms the closed circular structure which is called as the bacterial chromosome. The DNA is double stranded molecule with the double helices. There are many loops formed due to folding of these helix structures which helps in the formation of the nucleiod. When there is no supercoiling, the DNA is circular and considered to be in the relaxed state. The structure is right handed DNA with double helix. There are about 10 nucleotide pairs per turn. Thus, the correct answer is option A.
The DNA of the bacteria is covalently circular. It forms the closed circular structure which is called as the bacterial chromosome. The DNA is double stranded molecule with the double helices. There are many loops formed due to folding of these helix structures which helps in the formation of the nucleiod. When there is no supercoiling, the DNA is circular and considered to be in the relaxed state. The structure is right handed DNA with double helix. There are about 10 nucleotide pairs per turn.
Thus, the correct answer is option A.
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