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

Exercise and medications in bronchial asthma, Exercise Stress or em...

Exercise Stress or emotional upset  Medications Aspirin, non-steroidal anti-inflammatory drugs(NSAIDs), beta- blockers(including eye drops), cholinergic dr

Thermal properties-specific heat-water properties, Thermal Properties ...

Thermal Properties The range of temperature variatidn in the aquatic environment is smaller in comparison to air. This means the rate of change of temperature is slower in the

Determine recommended nutrient intakes by selenium, Determine recommended n...

Determine recommended nutrient intakes by selenium? The FAO/WHO 2004 recommendation for nutrient intake for selenium by groups is given in Table. How do these recommendations c

Explain the sa node cardiac muscle cells, Which of the following is true fo...

Which of the following is true for SA node cardiac muscle cells? A. An increase in the binding of norepinephrine to beta-adrenergic receptors in SA node cells will lead to an i

Determine the intracellular concentration of trva, Determine the intracellu...

Determine the intracellular concentration of TRVA Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectly c

Adaptation, Adaptation Closely related to irritability is the capacit...

Adaptation Closely related to irritability is the capacity of living things for adaptation. You might have noticed that whenever you go outside in the bright sun after having

Mechanism of gastrulation, MECHANISM OF GASTRULATION - It is most im...

MECHANISM OF GASTRULATION - It is most impotant stage of embryonal development, in which single layered blastula converts into 2 or 3 layered gastrula. During this stage,

Determine the functions of vitamin c, Determine the Functions of Vitamin C?...

Determine the Functions of Vitamin C? The vitamin C is involved in several physiological and biochemical functions in the body. Ascorbate is the biochemically active form of t

Define other sex determination systems, Besides the XY system are there oth...

Besides the XY system are there other sex determination systems? A few animals have a sex determination system different from the XY system such as the X0 system is the sex det

What do you mean by cold deserts, What do you mean by Cold Deserts? Col...

What do you mean by Cold Deserts? Cold deserts cover a vast area north of the Himalayan ranges forming an ecosystem with exceptionally low temperatures which may reach - 75°C a

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