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

Style of stigma interaction, Style of Stigma Interaction The style has...

Style of Stigma Interaction The style has been distinguished into two types: In open styles a stylar canal is present which is lined with a well-developed glandul

Digestive system - tongue, TONGU E - On the tongue 4 types of p...

TONGU E - On the tongue 4 types of papillae are present. (i) Filliform - Filliform papillae are most abundant and have no taste bunds. Filliform papillae

Explain expansion in plasma volume during pregnancy, Normal 0 f...

Normal 0 false false false EN-IN X-NONE X-NONE

Regulation of respiration in a child, Describe the factors that are involve...

Describe the factors that are involved in the regulation of respiration in a child who decides to hold his/her breath for as long as possible.

Define the basic function of keratin in the epidermis, Q. What is the funct...

Q. What is the function of keratin in the epidermis? The epidermis is the outer layer of the skin made of epithelial tissue in the epidermis there are keratin-secreting cells (

What is alleles, Whenever a pair of alleles has different alleles is there ...

Whenever a pair of alleles has different alleles is there dominance between them? Not in all cases of a gene having two different alleles is the dominance complete. There are g

Ecology.., examples of pyramid of energy

examples of pyramid of energy

Eyeball - choroid, CHOROI D - Thin, net like made up of connective ...

CHOROI D - Thin, net like made up of connective tissue, rich in blood vessels. Pigment present, red in rabbit, brown or black in man. It reduces internal reflection.

Flow cytometry, Ask que1. Design a 4 colour Flow cytometry experiment with ...

Ask que1. Design a 4 colour Flow cytometry experiment with an aim to identify B220-, CD3+, CD4+ (DOUBLE POSITIVE) AND B220+, CD3-, CD4- (DOUBLE NEGATIVE) cells. Select from the fol

Lung abscess, Lung Abscess: Lung  abscess  is a localised collection o...

Lung Abscess: Lung  abscess  is a localised collection of pus in  the pulmonary parenchyma as a result of  suppuration and necrosis. The obstruction  of the bronchus of the in

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