Q. When there is no net bending of the DNA axis upon itself, the DNA is said to be in a

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Q. Over-twisting of a molecule results in

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Q. Changing twist from relaxed state requires adding energy and increases the

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Q. The enzyme responsible for the removal of supercoiling in replicating DNA ahead of the replication fork is

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Q. The type of topoisomerases which generally relaxes DNA by removing negative supercoiling is

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Q. The type of topoisomerases that can introduce negative supercoils is

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Q. The type I enzyme(s) is/are

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Q. Under-winding is measured in terms of

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Q. Which type of supercoiling takes the form of extended right-handed coils?

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Q. The DNA threads which appear inside the nucleus at the time of cell division

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Q. Which of the following is not a major class of chromatin proteins?

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Q. Which of the following plays a substantial role in linking together sister chromatids immediately after replication?

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Q. Which of the following are essential to the condensation of chromosomes as cells enter mitosis?

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Q. Chromatin is composed of

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Q. Which of the following histones bind to linker DNA?

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Q. Which of the following has beads on a string structure?

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Q. Which of the following histones shows more sequence similarity among eukaryotic species?

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Q. The sister chromatids separate at

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Q. Cellular DNA is uncondensed throughout

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Q. DNA replication is

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