(a) Identify the structure shown in the above figure. (b) Identify the labels P and Q.

Question

Study the diagram given below and answer the questions that follows:

(a) Identify the structure shown in the above figure.

(b) Identify the labels P and Q.

(c) Write the nature of histone proteins.

(d) Distinguish between Euchromatin and Heterochromatin.

Answer 1

(a) The given figure represents the structure of a nucleosome.

(b) Label 'P' represents - DNA

Label 'Q' represents - Histone octamer

(c) Histone proteins are basic in nature 

(d) 

	Euchromatin	Heterochromatin
(i)	Loosely packed chromatin	Densely packed chromatin
(ii)	Stains light in colour	Stains dark in colour
(iii)	Transcriptionally active chromatin	Transcriptionally inactive chromatin