What is prokaryotic chromosomes, Biology

Assignment Help:

The DNA of a bacterial cell,such as Escherichia coli is a circular double-stranded molecule  often  referred  to as the bacterial  chromosome.  The circular  DNA  is packaged into a area of the cell called as the nucleoid where it is organized  into 50 or so loops  or domains  which are bound  to a central  protein scaffold  attached  to  the  cell  membrane. Above figure illustrates these industries, though only six loops are shown for clarity. Within this structure the DNA is in fact  not a circular  double-stranded  DNA  molecule  like  as that  shown  in fig.  but is negatively supercoiled,  which is, it is twisted upon itself and is also  completed  with  several  DNA-binding  proteins,  the  most  common  of that are proteins HU, H-NS and HLP-1. These are histone-like proteins.

944_22.png

Figure:  (a) The association of circular bacterial DNA with a protein scaffold; (b) a circular double-stranded DNA molecule; (c) supercoiled DNA.


Related Discussions:- What is prokaryotic chromosomes

How to measure blood pressure, Q. How to measure Blood Pressure? With t...

Q. How to measure Blood Pressure? With the onset of exercise, the resistance to blood flow through contracting muscles decreases significantly and results in a fall in the peri

Tracheal system in cockroach, Tracheal system in cockroach Cockroach...

Tracheal system in cockroach Cockroach belongs to phylum Arthropoda under invertebrate. They have specially developed tracheal system for respiration The system consis

What do you understand by tegument, What do you understand by tegument? ...

What do you understand by tegument? Outer covering of parasitic flatworms, including tapeworms and flukes, comprising a syncytial outer layer of cytoplasm connected to cell bod

What do you mean by acute pericarditis, What do you mean by Acute Pericardi...

What do you mean by Acute Pericarditis? Ans. Acute pericarditis is defined as acute inflammation of the pericardium and is clinically characterized by chest pain, fever, t

Define the effect of deficiency of vitamin c, Define the effect of Deficien...

Define the effect of Deficiency of Vitamin C? Severe ascorbic acid deficiency results in the development of the disease known as scurvy, three important manifestations of scur

Do echinoderms have an excretory system, Q. Do echinoderms have an excretor...

Q. Do echinoderms have an excretory system? How is excretion done in these animals? Echinoderms do not have an excretory system their excretions are eliminated by diffusion.

Criminal Justice, AYou are a sergeant in a community relations unit in a mi...

AYou are a sergeant in a community relations unit in a mid-sized metropolitan police department. Your division commander sent you off to a 1-week ethics school run by the Justice D

Tracheae - respiration, Tracheae - Respiration Insects that have succe...

Tracheae - Respiration Insects that have successfully colonised the terrestrial environment have evolved a respiratory system very different from other land animals - the trac

What is the endoplasmic reticulum, What is the Endoplasmic Reticulum Th...

What is the Endoplasmic Reticulum The cytoplasm of most eukaryotic cells contains a very complex network of internal membranes, called the endoplasmic reticulum, which forms ch

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