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

What is role of promoter is transcription?

  • Ans 1: Promoter is responsible for the correct initiation of transcription process.
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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

What is role of promoter is transcription?

  • Ans 1: Promoter is responsible for the correct initiation of transcription process.
Submit

12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

How many DNA polymerases are found in prokaryotes? Write their names.

  • Ans 1: There are three DNA polymerases namely I,II and III in bacteria.
    i) DNA polymerase I ii) DNA polymerase II iii) DNA polymerase III
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define Mutation.

  • Ans 1: The sudden change in DNA or gene is called mutation.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

What is contribution of Erwin chargaff with respect to chemical nature of DNA?

  • Ans 1: He formulated chargaff rule. He proposed that ratio of purines is equal to pyrimidines and ratio of adenine and thymine is equal to guanine and cytosine.
    A+T=G+C
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Give the functions of the DNA polymerase III.

  • Ans 1: DNA polymerase III progressively threads the DNA through the enzyme complex,moving at rapid rate,some 1000 nucleotides/second.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

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

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