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

What do you mean by ventricular arrhythmias, Q. What do you mean by Ventric...

Q. What do you mean by Ventricular Arrhythmias? Considerable disagreement exists regarding the significance of resting ventricular ectopic beats. In study comparing the coronar

Photosynthesis, Aim: To prove that oxygen is evolved during photosynthesis....

Aim: To prove that oxygen is evolved during photosynthesis. Apparatus: Beaker, funnel, test tube, water, Hydrilla plants. Procedure: Take a few pieces of Hydrilla plant. Keep a

Echocardiography, E c h o c a r d i og r a...

E c h o c a r d i og r ap h y : It is an exceptionally useful technique for diagnosing cardiovascular diseases, particularly in small an

Explain about amino acids, Do the -R groups bound to the central carbons pa...

Do the -R groups bound to the central carbons participate in the union among amino acids? The peptide bond attaches the nitrogen of the amine group of one amino acid to the car

Explain cooperative behaviours of social animal group, Explain Cooperative ...

Explain Cooperative behaviours of social animal group Group living, specialist roles, eg bees, ants Altruism, eg social insects, meerkats Group defence, eg social

Nephridia of worms, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Determine the functional structures of the leaf veins, What are the plant t...

What are the plant tissues that constitute the functional structures of the leaf veins? Leaf veins are made of vascular tissues. They are constitute by xylem and phloem that re

Collenchyma, Collenchyma are one of the three major cell types in the plan...

Collenchyma are one of the three major cell types in the plants; are elongated and have thicker walls than parenchyma cells and are usually arranged in strands; gives support and

What is the probability of a carrier of the recessive allele, Two parents w...

Two parents who are each known to be carriers of an autosomal recessive alleles have four children. None of the children has the recessive condition. What is the probability that o

What are the main parts of the human ear, What are the main parts of the hu...

What are the main parts of the human ear? The human ear is separated into three mains parts: the external ear, the middle ear and the internal ear. Hearing Review - Image D

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