The association of histone $H_1$ with a nucleosome indicates that

  • A
    $DNA$ replication is occurring
  • B
    the $DNA$ is condensed into a chromatin fibre
  • C
    the $DNA$ double helix is exposed
  • D
    transcription is occurring.

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..............is common for both $DNA$ and $RNA$ but.............is present only in $DNA$.

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The $DNA$ molecule has a uniform diameter due to which of the following?

Which of the following is known as soluble $RNA$ $(sRNA)$?

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