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

Reproductive systems, compare the lengths and paths of the uterine tubes (o...

compare the lengths and paths of the uterine tubes (oviducts) of the cat and the human

Explain turnover number, Explain Turnover number Turnover number:- Th...

Explain Turnover number Turnover number:- The  number  of  molecules  of substrate  transformed per catalytic  site of the enzyme per minute,

Explain the protein energy malnutrition (pem), Explain the Protein Energy M...

Explain the Protein Energy Malnutrition (PEM)? Protein Energy Malnutrition (PEM) is the deficiency of macronutrients or energy and protein in the diet and forms the most import

Match the dehydration reaction, Match dehydration reaction and hydrolysis r...

Match dehydration reaction and hydrolysis reaction to molecule synthesis and molecule break-down.

Bacterial cells, which intracellular organelles are present in bacteria?

which intracellular organelles are present in bacteria?

Explain chancroid, Chancroid  Chancroid, caused by Haemophilus ducreyi,...

Chancroid  Chancroid, caused by Haemophilus ducreyi,  is rare in the US. A single dose of azithromycin or ceftriaxone is usually effective, but may be less effective in HIV-inf

Explain the features of alternaria, Explain the Features of Alternaria? ...

Explain the Features of Alternaria? 1. Alternaria colony is wooly and compact. Underside is very dark coloured. Colony colour is grayish green or black with gray edges rapidly

Difference between extraradicular and intraradicular, What is the differenc...

What is the difference between extra. and intraradicular? Extraradicular means there is lesions came from periodontal or from the adjacent tissue and make periapical infection

Pollen biology, Pollen Biology Fluorescence microscopy coupled with bi...

Pollen Biology Fluorescence microscopy coupled with biochemical analysis has helped resolve the differential activity of the enzyme, β-l, 3- glucanase that catalyses the disso

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