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What are the thread-like stained structures present in the nucleus known as?

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What are the thread-like stained structures present in the nucleus known as?

(a) Chromosome

(b) Chromatid

(c) Chromatin

(d) Chloroplast

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Enquiry is from Packaging of DNA Helix topic in chapter Molecular Basis of Inheritance of Biology – Class 12

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Right option is (c) Chromatin

For explanation: A chromatin is a long thread-like structure which contains the nucleosome. Chromosome is a form which is achieved by the chromatin when it is undergoing cell division. In this form, both of the sister chromatids will be attached together at the centromere. Chromatids or sister chromatids are the thread like structures which are achieved when the chromosome is cut longitudinally during cell division. Chloroplast is a plastid that contains the green pigment chlorophyll.

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