Define nucleosomes , Biology

Assignment Help:

The initial stage of packaging have the binding of the chromosomal DNA to histones.  Whole, in chromosomes the ratio of the DNA to histones on a weight basis is around 1:1. There are five main types of histones called as H1, H2A, H2B, H3 and H4. Histones  are very  basic  proteins;  about  25 percent  of their  amino acids  are  lysine  or  arginine  so  histones  have  a  vast  number  of  positively charged amino acid side-chains.  These positively charged groups therefore bind to the negatively charged phosphate groups of DNA.  Not surprisingly giving their importance in packaging DNA the amino acid series of histones have been highly conserved in evolutio.

 


Related Discussions:- Define nucleosomes

Lamellar models, LAMELLA R MODELS According to James Danielly & Hu...

LAMELLA R MODELS According to James Danielly & Hugh Davson (1935) cell membrane consists of 4 layers P-L-L-P. Molecules of phospholipid has amphipathic nature, i.e. it

Discuss resting membrane potential and nerve action potentia, Question 1 W...

Question 1 Which are the 3 different processes in the formation of urine? Explain Question 2 Discuss resting membrane potential and nerve action potential Question 3 Nam

Define advantages of using the plate counts method, Define Advantages of Us...

Define Advantages of Using the Plate Counts Method? 1. It is simple and sensitive method. 2. It provides viable count as only live cells will grow and produce the colony.

Round worm, parasitic adaptation of round worm

parasitic adaptation of round worm

Animals - rapidly flowing waters, Animals - Rapidly Flowing Waters In ...

Animals - Rapidly Flowing Waters In the exposed rock surface habitats only those organisms are found which have efficient mechanisms for staying in one place. In fact despite

Proteins, assignment on the topic proteins

assignment on the topic proteins

Explain nutrition monitoring and evaluation, Nutrition Monitoring and Evalu...

Nutrition Monitoring and Evaluation Monitoring and evaluation is an essential step in the nutritional care process and  is very important too. Monitoring specifically refers to

How to monitor body weight to enhance athletic performance, How to monitor ...

How to monitor body weight to enhance athletic performance? Monitoring body weight is a practical way to assess energy balance. Weight stability, particularly during periods

How would contrast single covalent bonds, 1. In modern blimps, the gas of c...

1. In modern blimps, the gas of choice used to inflate them is helium rather than hydrogen. Hydrogen would be lighter, but helium is safer. Compare and contrast the atomic structur

What is uric acid , Uric acid is the main nitrogenous waste product o...

Uric acid is the main nitrogenous waste product of uricotelic organisms (birds, insects and reptiles), but is also established in ureotelic organisms from the breakdown of the puri

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd