Endoplasmic reticulum, Biology

Assignment Help:

ENDOPLASMIC RETICULUM

It is also known as Endoskeleton of the cell, Endomembranous system of the cell.

Garnier (1897) first observed them and called Ergastoplasm.

E.R. name proposed by Porter (1961).

E.R. present in all eukaryotic cells.

E.R. is a diffused cell organelle.

E.R. consists of three structure :-

(1) Cisternae - Long flattened and unbranched units arranged in stacks. 40-50 nm thick.

(2) Vesicles - 25-500 nm in diameter.

(3) Tubules - Long, isolated, branched units. 50-190 nm thick

Structure of E.R. is like the golgi body but in E.R. cisternae, vesicles and tubules are isolated in cytoplasm and these do not form complex.

Golgi body is localised cell organelle while E.R. is widespread in cytoplasm.

1080_endoplasmic reticulum.png


Related Discussions:- Endoplasmic reticulum

Phylum annelida, PHYLUM ANNELIDA Definition  and Introduction Bila...

PHYLUM ANNELIDA Definition  and Introduction Bilateral and  protosomial  eucoelomate  eumetazoans  whose  long   narrow and  wormlike body  is division  into  ring like  t

Scanning electron microscopy, Scanning Electron Microscopy (SEM) While 'T...

Scanning Electron Microscopy (SEM) While 'TEM is useful to study the internal structul-c of thc ccll. SEM is an important technique if you wish to examine the surl'ace features o

What is physical accommodation, What is Physical Accommodation Physical...

What is Physical Accommodation Physical Accommodation is the actual physical deformation in the lens power. It is measured in diopters, e.g., if the focussing power of the eye

Define drug effects on food intake - gastro intestinal tract, Define Drug E...

Define Drug Effects on Food Intake - gastro intestinal tract? Affect the gastro intestinal tract: Gastrointestinal irritation and ulceration are serious problems with many drug

Determine the accession number for the related gene-locus, Please answer th...

Please answer the following two questions on Sequence X: 1) DNA sequence databases 1. What is the EMBL-Bank accession number for this sequence (use BLAST)? 2. Which gen

Telophase of karyokinesis, - The chromosomes at each pole uncoil and elonga...

- The chromosomes at each pole uncoil and elongate to form the chromatin. - A nucleolus reappears at each pole. - Spindle fibers and asters disappear and centrioles split. - A nu

Genetics, GENETICS 1.         The branch genetics started in 1900 after...

GENETICS 1.         The branch genetics started in 1900 after rediscovery of Mendel's work. 2.         Gregor Johann Mendel is called Father of genetics. 3.         The t

Explain the hormonal control of the reproductive system, Explain the hormon...

Explain the hormonal control of the reproductive system in human male. Define totipotency. Verify the two different routes of regenerating plantlets from callus culture.

Define protein requirement at different stages of life cycle, Define Protei...

Define Protein Requirement at Different Stages of Life Cycle? Methods of Estimating and Assessing Protein Requirements at Different Stages of Life Cycle In this section, we

Annexin v is a protein that binds to phosphatidylserine, Annexin V is a pro...

Annexin V is a protein that binds to Phosphatidylserine. Why is this useful in the lab? Does it have to do with testing whether the cell is in normal condition?

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