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 transformation. Name the scientist who worked upon it?

  • Ans 1: When the DNA of donor is transferred into recipient cell it brings changes into genetic material of the recipient cell, It is called transformation. Fredrick Griffth first of all performed experiments on it.
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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 transformation. Name the scientist who worked upon it?

  • Ans 1: When the DNA of donor is transferred into recipient cell it brings changes into genetic material of the recipient cell, It is called transformation. Fredrick Griffth first of all performed experiments on it.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Compare telocentric and acrocentric chromosomes.

  • Ans 1: Telocentric Chromosomes:Telocentric has centromere at one end and chromatid part is present at other end.
  • Ans 2: Acrocentric Chromosomes: Acrocentric has two unequal arms one is short and other is long.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define phenylketonuria. OR What is phenylketonuria?

  • Ans 1: In phenylketonuria,phenylalanine is not degraded because of defective enzyme phenylalanine hydroxylase. Phenylalanine consequently accumulates in the cells leading to mental retardation,as the brain cells fails to develop in infancy.This disorder is due to point mutation.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

Differentiate between codon and anticodon.

  • Ans 1: Codon: Codon is sequence of three nucleotides present on mRNA and specifies an amino acid.
    For Example codon for methionine is AUG.
  • Ans 2: Anti Codon: Anticodon is the sequence of three nucleotides present on tRNA,anti codon of metionine is UAC.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Define initiation codon. What does it codes for?

  • Ans 1: Initiation codon is first codon in the process of protein synthesis from where protein synthesis starts.It codes for methionine.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

Where codon and anticodon are situated?

  • Ans 1: Codon are situated on mRNA(messenger RNA) while anticodon are situated on tRNA(transfer RNA).

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12th Class Biology Chapter 20 Short Questions

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