Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Eucaryotic cell structure
All eucaryotic cells have a cytoskeleton made up of a network of protein filaments (Figure shown below). This network gives the cell its shape, capacity to move and ability to transport organelles from one part of a cell to another. These protein filaments are similar in all eucaryotes. The important protein filaments are-actin and myosin in muscles and tubulin in microtubules. Actin and myosin are involved in muscle contraction and in the formation of microfilaments. Microtubules are hollow ~d form cilia, flagella, centriole and mitotic spindle. This kind of cytoskeleton is absent in the procaryotes.
In procaryotes the DNA molecule lies freely in the cytoplasm attached to the cell membrane. In eucaryotes it is enclosed inside the nucleus. This kind of formation of compartment protects DNA from many chemical changes that occur in the cytoplasm.
The DNA found in eucaryote is not only large (human cells contain DNA thousand times larger than that in a typical bacteria) but is also packed together with histones into / chromosomes. Histones are the proteins which are basic in nature, found in eucaryotes/They bind to DNA and wrap it up into compact chromosomes. Histones also-control the expression of the characters called gene expression. Histones are important proteins which have nbt undergone any change during evolution and are identical in all plant and animal cells studied so far. Division of the nucleus by mitosis is another characteristic of the eucaryotes which permits proper and equal distribution of the genetic material to the daugher cells. Ribosomes which are the granular structures consisting of RNA and proteins are necessary for protein synthesis. These are the only organelles that are common to both procaryotes and eucaryotes. However, there are some minor differences between procaryotic and eucaryotic ribosomes.
Define the term - microfilaments and microtubules The cytoskeleton is, in fact, termed as the "bone and muscle" of the eukaryotic cell, and is composed of a network, consisting
Q. What is Gastritis? Gastritis is an inflammatory lesion of the gastric mucosa, (the inner lining of the stomach). The problem is seen in two forms: a) Acute gastritis
State what is Genetic engineering Genetically engineered plant-incorporated protectants are created by a process that utilizes several dissimilar modern scientific techniques
C adm iu m Like lead and mercury, cadmium is also non-essential biologically. The industrial use of cadmium in plastic production, electroplating and manufacture of alloys a
Which of the following is an active transport process? A. Net flux of sodium across the plasma membrane via voltage-gated sodium channels. B. Net flux of glucose across the
Define Vitamin and mineral supplements for treatment for PEM? All cases of severe PEM require multivitamin preparation to meet the increased demands during recovery. Iron (60 m
1 list the names of the phyla of animalike protists that have only free-living members
Q. What is the function of the umbilical cord? The umbilical cord is a set of blood vessels that connects the fetus with the placenta and in the fetus one extremity of the cord
Autophagic intracellular digestion is the cellular internal digestion of waste and residual materials. In general it is completed by lysosomes. Autophagic intracellular digestio
Q. Enumerate various factors controlling osseointegration? The factors controlling osseointegration are: i) Occlusal load ii) Biocompatibility of the material iii) Imp
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd