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

Define leading and lagging strand of DNA.

  • Ans 1: Lagging strand is that strand of DNA which is discontinuously synthesized while the strand of DNA which is continuously synthesized is called leading strand.
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Prepare Complete Set Wise Questions For Chapter 6 "12th Class Biology Chapter 20 Short Questions Preparation "

12th Class Biology Chapter 20 Short Questions Preparation - Set 1

Question # 1

Define leading and lagging strand of DNA.

  • Ans 1: Lagging strand is that strand of DNA which is discontinuously synthesized while the strand of DNA which is continuously synthesized is called leading strand.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

How many chromosomes are found in ferns and in Frog?

  • Ans 1: Number of chromosomes found in ferns are more than 500 pairs.
    Number of chromosomes found in frog are 26.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

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 4

Question # 1

Define transcription.

  • Ans 1: Syntheis of mRNA from the DNA is called transcription.It is first step of central dogma.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Define genetic code.

  • Ans 1: Genetic code is combination of three nucleotides,which specify a particular amino acid.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

Mention the types of chromosomes due to centromeric position.

  • Ans 1: There are four types of chromosomes.
    i) Metacentric ii)Sub Metacentric iii)Acrocentric iv)Sub Acrocentric.
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12th Class Biology Chapter 20 Short Questions

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