| - | Normal cell | - | Cancerous cell |
| 1. | Normal cells show the property of contact inhibition. Therefore when these cells come into contact with other cells they stop dividing. | 1. | Cancerous cells lack the property ofcontact inhibition. Therefore they continue to divide thereby forming a mass of cells or tumor. |
| 2. | They undergo differentiation after attaining a specific growth. | 2. | They do not undergo differentiation. |
| 3. | These cells remain confined at a particular location. | 3. | These cells do not remain confined at a particular location. They move into neighboring tissues and disturb its function. |

Study the chemical structure of an addictive drug shown below and answer the questions that follow.
A racing track is built around an elliptical ground whose equation is given by \[ 9x^2 + 16y^2 = 144 \] The width of the track is \(3\) m as shown. Based on the given information answer the following: 
(i) Express \(y\) as a function of \(x\) from the given equation of ellipse.
(ii) Integrate the function obtained in (i) with respect to \(x\).
(iii)(a) Find the area of the region enclosed within the elliptical ground excluding the track using integration.
OR
(iii)(b) Write the coordinates of the points \(P\) and \(Q\) where the outer edge of the track cuts \(x\)-axis and \(y\)-axis in first quadrant and find the area of triangle formed by points \(P,O,Q\).
Cancer is a term used to derive the diseases caused due to cellular irregularities. The disease can begin in any of the trillion cells that form the human body. When these cells get old or damaged, then they die and are replaced by new cells. However, this process is deranged when cancer arises. When cells should die, they live on, and new cells grow when they aren't needed.
These excess cells can divide endlessly, potentially forming tumors. Changes in genes that hold how our cells function, particularly how they grow and split, cause cancer. Accelerating cell division rates or standing in normal control can result in gene mutations. The genes sometimes cause cancer we obtain from our parents.
There are many types of cancer. They are named for the organs or tissues where cancer evolves. Here are some categories such as;