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Question
How can 6 feet of DNA fit in the nucleus of a human cell?
How can 6 feet of DNA fit in the nucleus of a human cell?
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Solution
DNA inside the nucleus of a human cell
- The hereditary material present inside the nucleus of a cell is called DNA.
- A typical higher eukaryotic cell contains 2m of DNA packed into a nucleus 10 micrometres in diameter.
- DNA is wrapped around basic histone proteins to form nucleosomes.
- These nucleosomes are further organized in the form of higher-order chromatin fibres.
- these chromatin fibres condense to form chromosomes that fit inside the nucleus as shown below:
DNA inside the nucleus of a human cell
- The hereditary material present inside the nucleus of a cell is called DNA.
- A typical higher eukaryotic cell contains 2m of DNA packed into a nucleus 10 micrometres in diameter.
- DNA is wrapped around basic histone proteins to form nucleosomes.
- These nucleosomes are further organized in the form of higher-order chromatin fibres.
- these chromatin fibres condense to form chromosomes that fit inside the nucleus as shown below:
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