Chromatin contain DNA, some acidic protein called histone and some non histone protein

Non-histone proteins

Read the following four statements (i -iv) (i) Every chromosome essentially has a primary constriction or the centromere. (ii) During different stages of cell division, cells show structured chromosomes in place of the nucleus . (iii) Nuclear pores are the passages through which movement of RNA and Protein takes place in one direction between the nucleus and cytoplasm. (iv) Chromatin contains DNA, some basic proteins called histone adn RNA only . How many of the above statement are

Histone proteins are

Read the assertion and reason carefully to mark the correct option in question. Assertion: Interphase nucleus has a loose and distinct network of fibre called chromatin. Reason: Chromatin contain RNA, DNA and histone proteins but non-histone proteins are absent.

Nature of histone protein is :-

Assertion : DNA is associated with proteins. Reason : DNA binds around histone proteins that form a pool and the entire structure is called a nucleosome.

Amino acid present in histones are

Name some common sources of protein.