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NEET2017ZoologyMolecular Basis of InheritanceActual

The association of histone H 1 with a nucleosome indicates:

Options

  1. ATranscription is occurring
  2. BDNA replication is occurring
  3. CThe DNA is condensed into a chromatin fibre
  4. DThe DNA double helix is exposed

Correct answer

C. The DNA is condensed into a chromatin fibre

Step-by-step solution

The association of H 1 protein indicates the complete formation of nucleosome which requires DNA condensation. The DNA is therefore in condensed form. Histone H 1 is one of the five main histone protein families (H1, H2A, H2B, H3 and H4) which are components of chromatin in eukaryotic cells. H 1 histones bind to the linker DNA exiting from the nucleosome core particle, thus making the nucleosome complete.

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