Which of the following statements accurately uses the information presented to support the hypothesis that interruptions of m functions in a single body cell can result in cancer
a) protein 3 will be prevented from interacting with cams causing the cell cycle to stop permanently
b) the ras protein will remain bound to dna blocking expression of genes required for mitosis
c) growth factor signaling can trigger mitosis in cells that are n direct contact with other cells
d) the receptor proteins of body cells will no longer bind to growth factor proteins

Explanation:

A) The hypothesis says that interruption of function of M protein in a single body cell should result in cancer. But this statement is representating contact inhibition i.e. the process by which cancer cannot occur. So this statement does not support the hypothesis at all. Hence it is incorrect.

B) In the diagram we can see that ras protein is attached to the CAM in the dividing cell. So if ras protein will remain bound to the DNA then there will be contact inhibition and this situation will not justify our hypothesis, hence this statement is incorrect.

C) If the M protein becomes non-functional then protein 3 can bind to CAM and promote cell division even when two cells are in contact. This means that cells will lose contact inhibition and growth factor signalling can trigger cancerous condition. This statement justifies the hypothesis, hence it is correct.

D) If the receptor protein does not bind to the growth factor protein then cell division cannot occur. Thus this statement does not justify our hypothesis. Hence it is incorrect.

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A.

D.

Explanation:

There will be the prevention of protein 3  from interacting with CAMs causing the cell cycle to stop permanently.

The receptor proteins of body cells will no longer bind to growth factor proteins .

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