Question

why are chromosmes have thread like structure ?

Answer 1

Answer:

in the nucleus of each cell, the dna molecule is packaged into thread-like structures called chromosomes. each chromosome is made up of dna tightly coiled many times around proteins called histones that support its structure

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Answer 2

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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.