Multiple choice

Which of the following statements is/are not correct about deoxyribonucleic acid?

  1. Histones are rich in the acidic amino acid moities.
  2. A typical nucleosome contains 200 bp of DNA helix.
  3. The chromatin that is more densely packed and stains dark are called as euchromatin.
  4. Euchromatin is a transcriptionally active chromatin.

  1. 1 and 2

  2. 1 and 3

  3. 1 and 4

  4. 2 and 3

  5. 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In eukaryotes, there is a set of positively charged, basic proteins called histones. Histones are rich in the basic amino acid residues lysines and arginines. In a typical nucleus, some region of chromatin are loosely packed (and stains light) and are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin.

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