Cell-cycle controls, Biology

Assignment Help:

• Cancer cells do not respond normally to the body's control mechanism.

o They divide excessively and invade other tissues.
o If left unchecked, they can kill the organism.

• Cancer cells do not exhibit contact inhibition

o If cultured, they continue to grow on top of each other when the total area of the petri dish has been covered
o They may produce required external growth factor (or override factors) themselves or possess abnormal signal transduction sequences which falsely convey growth signals thereby bypassing normal growth checks.

• Cancer cells exhibit irregular growth sequences

o If growth of cancer cells does cease, it does so at random points of the cell cycle
o Cancer cells can go on dividing indefinitely if they are given a continual supply of nutrients
o Normal mammalian cells growing in culture only divide 20-50 times before they stop dividing.


Related Discussions:- Cell-cycle controls

How much vitamins should be taken for management of obesity, How much Vitam...

How much Vitamins should be taken for management of obesity? If adequate amount of fresh fruits and vegetables are included in the diet, the body stores of water soluble vitami

Explain about microwave irradiation, Q. Explain about Microwave irradiation...

Q. Explain about Microwave irradiation? Most micro-organisms are destroyed by the action of microwave of a frequency of about 2450 MHz and a wavelength of 12.24 cm. The water c

Batelnut, B A TELNU T - Kernel of the betalnut palm, areca catechu, ...

B A TELNU T - Kernel of the betalnut palm, areca catechu, enclosed in betal leaves and mixed with an aromatic paste is chewed extensively in India & Africa. It contains arec

Spoilage by fungi and bacteria, Q. Explain Spoilage by fungi and bacteria? ...

Q. Explain Spoilage by fungi and bacteria? The dominant spoilage organisms in fruits are fungi, as their pH is low (normally 5),whereas the pH of vegetables is fiom 5.0 to 7

Atmosphere, Atmosphere is a multilayer blanket of various gases such as N2 ...

Atmosphere is a multilayer blanket of various gases such as N2 (78.80%), O2 (20.95%), Ar(0.93%), CO2 (0.03%), water vapor and some other gases. This envelope extends from earth's c

Cytoplasmic reorganisation, Cytoplasmic Reorganisation Meiosis is also...

Cytoplasmic Reorganisation Meiosis is also associated with major reorganisation of the cytoplasm of MMCs and microspores. Microspore mother cell shows high metabolic activity.

Concept of recombination frequency used in genetic mapping, How can the con...

How can the concept of recombination frequency be used in genetic mapping? The Genetic mapping is the determination of the location of the genes in a chromosome. Besides determ

Taxonomy, what is the taxonomic classification for the protist Archaeplasti...

what is the taxonomic classification for the protist Archaeplastida?

Does sunlight kill bacteria, Does sunlight kill bacteria? Inoculate two...

Does sunlight kill bacteria? Inoculate two sterile bacteria dishes from a dish where bacteria are growing. Place single dish in the open sunlight and the other in a warm dark p

Which pancreatic tissues involved in endocrine secretion, Q. What are the p...

Q. What are the pancreatic tissues involved respectively in the endocrine and exocrine secretions? What are their respective hormones and enzymes? The exocrine secretion of the

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