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Question
Which type of coiling occurs in chromosomes ?
Which type of coiling occurs in chromosomes ?
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Solution
The correct option is A Plectonemic
In plectonemic coils, the chromosomal fibrils are closely intertwined and they cannot be separated easily. The degree of coiling during cell division depends on the length of chromosomes. The type of coiling during mitosis is plectonemic. DNA supercoiling refers to the over- or under-winding of a DNA strand, and is an expression of the strain on that strand. Certain enzymes such as topoisomerases are able to change DNA topology to facilitate functions such as DNA replication or transcription.So, the correct answer is option A.
In plectonemic coils, the chromosomal fibrils are closely intertwined and they cannot be separated easily. The degree of coiling during cell division depends on the length of chromosomes. The type of coiling during mitosis is plectonemic. DNA supercoiling refers to the over- or under-winding of a DNA strand, and is an expression of the strain on that strand. Certain enzymes such as topoisomerases are able to change DNA topology to facilitate functions such as DNA replication or transcription.
So, the correct answer is option A.
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