Causes of cancer, Biology

Causes of Cancer

Scientists have identified the cellular genes that code for those proteins which jointly control and regulate cell growth and division. These  genes are of two broad categories proto  oncogenes and tumor supprerssor genes. Any change i.e. mutations in these genesparticularly in the proto oncogenes, shatters the cellular controls over growth and division rendering the concerned cells carcinogenic. A mutated proto oncogene is called oncogene.

Mutations in proto oncogenes and other related genes may occur spontaneously due to a variety of factors originating in the cells themselves. These may also occur due to physiological disorders   in the body beside this, certain external environmental factors have alsobeen indentified as carcinogenic mutagens. It has been found that incidence of cancer increases in a population exposed to ionizing radiations (X-rays, gamma rays and ultlraviolet rays )  and certain chemicals such as those present in chimney smoke. Chemical present in cigarette smoke such as vinyle chloride, benzopyrenes and nitro so nor nicotine, are known to cause lung cancer.     

Posted Date: 9/26/2012 6:42:35 AM | Location : United States







Related Discussions:- Causes of cancer, Assignment Help, Ask Question on Causes of cancer, Get Answer, Expert's Help, Causes of cancer Discussions

Write discussion on Causes of cancer
Your posts are moderated
Related Questions
Q. Concerning the number of hosts how are parasites classified? The Parasites that require only one host are called as monoxenous parasites. The Parasites that need more than o


Alterations occuring in cereal & cereal products, legumes You are already aware of the chemical composition of cereals and pulses.  We will now look into changes occurring in t

Normal nutrition: a base of therapeutic diet Normal nutrition is the foundation upon which the  therapeutic modifications are based. The primary principle of diet nutrition the

Concerning the maintenance of body temperature how do beings of the class Reptilia classify? Like fishes and amphibians, beings of the class Reptilia are heterothermic animals

How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development? In crustaceans there are species with direct and oth

How does sexual reproduction occur in bacteria? How different are the modalities of bacterial sexual reproduction? Sexual reproduction happens when bacteria incorporate genetic

Q. Discuss the advantages of implant supported maxillo-facial prosthesis. Maxillofacial Prosthodontics involves the prosthetic rehabilitation of patients with congenital or acq

Q. Can you explain about Ventriculography? Cardiac ventriculography is a diagnostic test, i.e., used to define the anatomy and function of the ventricles (left and right) and r

Define Advantages of Using the Plate Counts Method? 1. It is simple and sensitive method. 2. It provides viable count as only live cells will grow and produce the colony.