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

Define cell cycle.Give its phase.

  • Ans 1: Events or changes occur during the division of a cell is called cell cycle.It has two phase
    i) Interphase ii) Mitotic phase.
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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

Define cell cycle.Give its phase.

  • Ans 1: Events or changes occur during the division of a cell is called cell cycle.It has two phase
    i) Interphase ii) Mitotic phase.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 2

Question # 1

Give four importance of mitosis.

  • Ans 1: i) It transfers unchanged genetic information to the daughter cells
    ii) It helps in all types of asexual reproduction like cloning,tissue culture etc
    iii) It helps in healing of wounds
    iv) It maintains the chromosomes number constant.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

How cytokinesis differ in plant and animal cell?

  • Ans 1: Cytokinesis in plants: In plants cytokinesis occur by phragmoplast formation.Golgi vesicles arrange in the center and fuse with each other forming cell wall between two daughter nuclei which in turn divides into two daughter cells.
  • Ans 2: Cytokinesis in animals: In animals the cytokinesis occurs by inward pinching of cell membrane and parent cell divides into two daughter cells.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

Give causes and symptoms of Down's syndrome. Or Write symptoms of Down's syndrome.

  • Ans 1: The cause of Down's syndrome is the missing of 21stchromosomes due to non disjunction. The affected individuals have a flat,broad face,squint eyes with folds in the inner corner and protruding tongue,mental retardation and defective development of central nervous system.
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12th Class Biology Chapter 21 Short Questions

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