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Introduction:
Cancer can be described as the uncontrolled cell divisions, which leads to the tumor formation and may hamper the normal cell functioning.
Answer to Problem 33A
Correct answer:
The correct answer is option (D) contain only one genetic change.
Explanation of Solution
Explanation/justification for the correct answer:
Options (D) contain only one genetic change. Researchers have found that only one gene change does not cause cancer. Usually, cancer occurs from multiple mutations in genes. So, the correct answer is an option (D).
Explanation for incorrect answer:
Option (A) uncontrolled cell division. The dividing cell forms two identical daughter cells. If the cell cycle is not controlled, it leads to cancer. Cancer occurs when the cell division is very fast. So, this is an incorrect option.
Option (B) lack of cell cyclin. Cyclin is a protein that plays a role in controlling elements of the eukaryotic cell cycle. The Malfunction of cyclin D causes cancer. So, this is an incorrect option.
Option (C) cancer cells crowd out normal. Cancer cells travel to other parts of the body where they can grow and form new tumors that crowd out the normal tissue. It happens when the cancercell spread into the bloodstream or lymph. The spread of cancer is called metastasis. So, this is an incorrect option.
Chapter 9 Solutions
EP BIOLOGY 2012-STUDENTWORKS ONLINE
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