Advertisements
Advertisements
Question
Explain the role of histones in forming a nucleosome.
Advertisements
Solution
(i) Histones are positively charged basic proteins which are organised to form a unit of eight molecules called histone octamer.
(ii) Histones are rich in the basic amino acids residues lysines and arginines which carry positive charges in their side chains.
(iii) The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called nucleosome.
APPEARS IN
RELATED QUESTIONS
Differentiate between Euchromatin and Heterochromatin.
Describe the structure of a nucleosome.
Which of the following is the CORRECT statement with respect to formation of nucleosome?
A typical nucleosome "bead" is made up of ______.
The length of DNA can be calculated by ______.
The net electric charge on DNA and histones is ______.
Read the following and answer from given below:
The process of copying genetic information from the template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.
Monocistronic structural genes are found in which organisms?
Histones are rich in ______.
The most abundant prokaryotes helpful to human in making curd from milk and in the production of antibiotics are the ones categorised as ______ .
Nucleosomes are the repeating units of chromatin the part between adjacent nucleosomes is called ______ .
