DNA as genetic material occurs by itself in lower organisms and combines with proteins as nucleoproteins in higher organisms. The nucleoprotein is organized in higher forms to form

Chromosome

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Nucleolus

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Nucleotides

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Nucleoside

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Solution

The correct option is A Chromosome
The chromosomes are characteristic of higher organisms. Chromosomes are composed of chromatin material. Chromatin is a fibrous heredity material formed by DNA-histone complex. Basically, the DNA-histone thread consists of nucleosome chains. The nucleosome chains are made of histone proteins forming charged cores around which DNA is wrapped.
So, the correct answer is option A.

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