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 "

Try The Short Questions For 12th Class Biology Chapter 20 Short Questions Preparation

  • Total Questions10

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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

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 Preparation - Set 3

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 Preparation - Set 4

Question # 1

Enlist initiation codon and non-sense codons.

  • Ans 1: Initiation codon is Aug and non sense condons are UAA,UAG and UGA.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Describe chromosomal aberrations.

  • Ans 1: Chromosomal aberrations are mega changes which involve presence of an extra chromosome or loss of a chromosome from the diploid number of chromosomes or changes like addition,insertion,inversion and duplication.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

How is newly synthesized mRNA protected after transcription?

  • Ans 1: A cap and tail is added so that molecule may remain stable during its travelling to cytoplasm. The cap is in the form of 7-methyl GTP where as tail is in the form of poly A tail linked to 3 end of the RNA.These cap and tail protects RNA from action of enzymes.
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12th Class Biology Chapter 20 Short Questions

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