Fsc part 2 online preparation for biology chapter 21 (Cell Cycle)

Online Short Questions For Chapter 7 "12th Class Biology Chapter 21 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 21 Short Questions Preparation

Question # 1

Cancer is uncontrolled cell division. Explain.

  • Ans 1: It is called so because genes controlling the cell division lose their control over cell division and cell divides without any control,so it is called uncontrolled cell division.
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Prepare Complete Set Wise Questions For Chapter 7 "12th Class Biology Chapter 21 Short Questions Preparation "

12th Class Biology Chapter 21 Short Questions Preparation - Set 1

Question # 1

Cancer is uncontrolled cell division. Explain.

  • Ans 1: It is called so because genes controlling the cell division lose their control over cell division and cell divides without any control,so it is called uncontrolled cell division.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 2

Question # 1

Give the chances of occurrence of Down's syndrome in teenage mothers and a forty years old mother's offspring.

  • Ans 1: The chances of teenage mother having down's syndrome child is one in many thousands of forty years old mother,one in hundred chance and by forty five the risk is three times greater.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

Write down the two functions of programmed death of a cell.

  • Ans 1: Programmed cell death helps in proper control of multicellular development which lead to deletion of entire structure (e.g, the tail of developing human embryos) or part of structure (e.g tissue between developing digits.)
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

Write down the events of metaphase of mitosis.

  • Ans 1: The Kinetochore fibers of spindles attach to the kinetochore region (specialized area in centromere) of chromosomes and align them at the equator of the spindle forming equatorial plate or metaphase plate.
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21th Chapter

12th Class Biology Chapter 21 Short Questions

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