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 "

Try The Short Questions For 12th Class Biology Chapter 21 Short Questions Preparation

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Biology - 12th Class Biology Chapter 21 Short Questions Preparation

Question # 1

Name only stages of prophase I of meiosis.

  • Ans 1: Following are the sub stages of prophase I of meiosis
  • Ans 2: i) Leptotene ii) zygotene iii) pachytene iv) diplotene v) diakinesis
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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

Name only stages of prophase I of meiosis.

  • Ans 1: Following are the sub stages of prophase I of meiosis
  • Ans 2: i) Leptotene ii) zygotene iii) pachytene iv) diplotene v) diakinesis
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12th Class Biology Chapter 21 Short Questions Preparation - Set 2

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 3

Question # 1

What changes occur in a cell during apoptosis?

  • Ans 1: During apoptosis the cell shrink and condensed ultimately split up thus release the small membrane bounded apoptotic bodies which are generally phagocytosed by other cells. Intracellular constituents are not released freely in extracellular environment which otherwise might have toxic effect.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

Define crossing over.Give its significance.

  • Ans 1: It is exchange of segments of chromosomes between non sister chromatids. Its significance is that,it provides raw material for evolution and also from new recombination of genes.
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12th Class Biology Chapter 21 Short Questions

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