Cytoplasmic reorganisation, Biology

Assignment Help:

Cytoplasmic Reorganisation

Meiosis is also associated with major reorganisation of the cytoplasm of MMCs and microspores. Microspore mother cell shows high metabolic activity. As meiosis is initiated, the synthetic activity of the cell is reduced. The rate of synthesis of RNA and proteins is drastically reduced. The cell goes through dedifferentiation. The ribosome population of the cell comes down significantly. Even the mitochondria and plastids undergo dedifferentiation, that is, they lose most of the internal membrane system and become spherical bag-like structures. However, small pockets of cytoplasm (consisting 10-20 percent of the total cytoplasm) gets enclosed by membranes and these pockets do not undergo the reorganisation that occurs in the remaining part-of the cytoplasm. Towards the end of meiosis, the microspores restore the synthetic activity. The synthesis of RNA and proteins is initiated, the ribosome population of the cell is restored and the mitochondria and plastids re-differentiate to their normal configuration with internal membrane system and regain their original shape.


Related Discussions:- Cytoplasmic reorganisation

Gibberellins in plant growth , Gibberellins in plant growth  Gibbere...

Gibberellins in plant growth  Gibberellins were first isolated from the culture of a fungus Gibberella fujikuori. Gibberellins has a significant effect on stem elongation

Define biosystematics - animal taxonomy, Define Biosystematics - Animal Tax...

Define Biosystematics - Animal Taxonomy Biosystematics is basically synonymous with systematic, though it places more emphasis upon genetic (concerning inheritance) and cytolog

Phylem protozoa, how does these phylem parasites????

how does these phylem parasites????

Explain the cardiac cycle of human body, Explain the Cardiac Cycle of human...

Explain the Cardiac Cycle of human body? The different stages of a heart pumping cycle are referred to as follows: contraction of the ventricles is called systole, and relaxati

Define the energy requirement to avoid underweight problem, Define the Ener...

Define the Energy requirement to avoid Underweight problem? The total calorie intake should be 500 to 1000 Kcal in excess of the daily needs in order to result a gain in weight

Carbon dioxide for photosynthesis, Aim: To prove that Carbon dioxide is ess...

Aim: To prove that Carbon dioxide is essential for photosynthesis. Apparatus: A potted healthy plant with long and narrow leaves, a wide mouthed glass bottle, split cork. Chemicals

What are contraction of sarcomeres of the muscle cells, Q. What are the few...

Q. What are the few examples of movement created by the contraction of sarcomeres of the muscle cells? The handling of a cup of coffee, the peristaltic movements of the bowels,

What treatment should be used for cardiac tamponade, Q. What Treatment shou...

Q. What Treatment should be used for cardiac tamponade? Percutaneous Pericardiocentesis Cardiac tamponade is an acute emergency and percutaneous pericardiocentesis must b

Animal nutrition - zoology, Anima l Nutrition Nutrition is the procu...

Anima l Nutrition Nutrition is the procurement of substances necessary for growth, maintenance and activities of a living body. The substances used for nutrition are called

Type specimen of class enteropneusta, Q. Type specimen of class enteropneus...

Q. Type specimen of class enteropneusta? Examine the specimen and note the following features: 1. Balanoglossus has a soft, elongated, worm-like body which has a ciliated surf

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