Cytosketal mechanism, Biology

Assignment Help:

Cytosketal Mechanism

There are two co-ordinate processes in the cleavage (or cell division) that is displayed in Figure.

Karyokinesis

The mitotic division of nucleus depends on the creation of mitotic spindle that is constituted by microtubules of which the tubulin protein is the structural unit Treatment of the egg along with the drug colchicines disrupts the microtubules and arrests Karyokinesis at metaphase.

1744_Cytosketal Mechanism.png

Figure:  Role of microtubules and microfilaments in cell divisions

Cytokinesis

Division of the cell depends on the contractile microfilaments of which protein actin is the structural unit. A ring of microfilament emerges in the cortex around the cell in which the cleavage furrow is formed. Contraction of the microfilament ring in the purse-string manner deepens the furrow finally cutting the cell into two. Treatment of the egg along with cytochalasin B inhibits the organisation of contractile ring of microfilaments that is why cleavage furrow is not made and cytokinesis does not take place.


Related Discussions:- Cytosketal mechanism

Which kind of polarity do water-soluble have, Which kind of polarity do wat...

Which kind of polarity do water-soluble and fat-soluble substances respectively have? Water-soluble substances are polar molecules, i.e., they have electrically charged areas.

Transcription in prokaryotes, As in several fields of molecular biology stu...

As in several fields of molecular biology studies of E. coli have gives the model for subsequent investigations of transcription in eukaryotic cells. The basic mechanisms by that t

Difference between a bird heart and a mammalian heart, What is the main dif...

What is the main difference between a bird heart and a mammalian heart? The bird heart has a one aortic arch on the right side of its body while the mammalian heart has one on

Explain the main function of the digestive system, Explain the main  funct...

Explain the main  function of the digestive system The major function of the digestive system is to ingest the food materials, digest it to absorbable end products, absorb the

Explain the mechanisms suggested for bile acid adsorption, Explain the Mech...

Explain the Mechanisms suggested for bile acid adsorption? Mechanisms suggested for bile acid adsorption are: 1. Hydrophobic interactions between lignin and bile acids, 2

Blood be enhanced during vigorous activity, The percentage of oxygen absorb...

The percentage of oxygen absorbed from the air in the lungs is always about the similar, so how can the oxygen supply to the blood be enhanced during vigorous activity? Breathi

Explain phylum tracheophyta, Phylum Tracheophyta Tracheophytes mean vas...

Phylum Tracheophyta Tracheophytes mean vascular plants. Tracheophyta includes ferns, the gymnosperms and the flowering plants. They have appeared some 400 million years ago, an

Explain some effect of inadequate nutrition, Explain some Effect of Inadequ...

Explain some Effect of Inadequate nutrition? Inadequate nutrition ranks as one of the major problems of old age. Various factors which may be responsible for the change in one

Detection of pulmonary hypertension, Pressure calculation made using the Be...

Pressure calculation made using the Bernoulli equation may be used  in conjunction with pressure measurements made by other modalities to determine various intracardiac pressure.

How different is the amphibian heart from the fish heart, Q How different i...

Q How different is the amphibian heart from the fish heart? The fish heart has only two chambers, a ventricle and an atrium, and the blood that comes to it is purely venous.

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