What is cancer? How is a cancer cell dif | Class 12 Biology Chapter Human Health and Disease, Human Health and Disease NCERT Solutions

Question:

What is cancer? How is a cancer cell different from the normal cell? How do normal cells attain cancerous nature?

Answer:

An abnormal and uncontrolled growth of cells that causes malignant growth and enlargement of tissues is termed as cancer. Genes called cellular oncogenes or proto-oncogenes present in normal cells when activated under certain conditions lead oncogenic transformation of the normal cells that leads to cancer. A cancer cell is different from the normal cell in following ways:

Cancer cell	Normal cell
Cancer cells divide in an uncontrolled manner.	Normal cells divide in a controlled manner.
The cells do not show contact inhibition.	The cells show contact inhibition.
Life span is indefinite.	Life span is definite.

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Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Human Health and Disease.
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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 19: What is cancer? How is a cancer cell different from the normal cell? How do normal cells attain....

What is cancer? How is a cancer cell dif | Class 12 Biology Chapter Human Health and Disease, Human Health and Disease NCERT Solutions

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