12 Class Fsc Part 2 Short Questions Online Preparation of biology chapter 20 (Chromosoms and DNA)

Online Short Questions For Chapter 6 "12th Class Biology Chapter 20 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 20 Short Questions Preparation

Question # 1

How many chromosomes are present in mouse and sugar cane?

  • Ans 1: Sugar can has 80 while mouse has 40 chromosomes respectively.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 1

Question # 1

How many chromosomes are present in mouse and sugar cane?

  • Ans 1: Sugar can has 80 while mouse has 40 chromosomes respectively.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Differentiate between conservative and dispersive replication of DNA.

  • Ans 1: Conservative Replication: Conservative replication stated that the parental strands would remain intact and generate DNA copies consisting of entirely new molecules.
  • Ans 2: Dispersive Replication: Dispersive model states that parental DNA would become completely dispersed and that each strand of all the daughter molecules would become mixture of old and new DNA.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

How is translation terminated?

  • Ans 1: When a chain terminating non sense codon is exposed,this non sense codon do not bind any tRNA but they are recognized by release factor,protein that release the newly made polypeptide from the ribosome.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

What is phosphodiester linkage?

  • Ans 1: The reaction between the phosphate group of one nucleotide and the hydroxyl group of another is dehydration synthesis,eliminating water molecule and forming a covalent bond that links the two groups is called phosphodiester bond.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

What is transcription bubble? How is it formed?

  • Ans 1: The DNA strand open at specific place where enzyme is attached to the template strand forming transcription bubble.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

What is transformation?

  • Ans 1: When DNA of donor cell is inserted into recipient cell it changes the genetic material of recipient cell,this process is called transformation.
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12th Class Biology Chapter 20 Short Questions

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