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

How cytokinesis occur in plants?

  • Ans 1: At cytokinesis,in place of contractile ring a membrane structure,phragmoplast informed from vesicle,which originates from Golgi complex.These vesicles lined up in the center of the dividing cell,where they fuse to form phragmoplast. The membrane of vesicles become the plasma membrane of daughter cells.
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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

How cytokinesis occur in plants?

  • Ans 1: At cytokinesis,in place of contractile ring a membrane structure,phragmoplast informed from vesicle,which originates from Golgi complex.These vesicles lined up in the center of the dividing cell,where they fuse to form phragmoplast. The membrane of vesicles become the plasma membrane of daughter cells.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 2

Question # 1

What events occur in anaphase of mitosis?

  • Ans 1: During anaphase of mitosis spindle contract and centromere divides and two sets chromosomes are formed.Each set of chromosomes moves toward opposite poles.So that each pole receive one set of chromosomes.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

What changes in cell take place during diplotene?

  • Ans 1: The paired chromosomes repel each other and begins to separate.Separation however,is not complete,because homologous chromosomes remain united by their point of interchange.Each bivalent has at least one such point,the chromatids other wise separated.
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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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