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

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Biology - 12th Class Biology Chapter 20 Short Questions Preparation

Question # 1

What is phosphodiester bond? How it is formed?

  • Ans 1: The reaction between phosphate group of one nucleotide and hydroxyl group of another is a dehydration synthesis,eliminating a water molecule and forming a covalent bond between two groups. This linkage is called a phosphodiester bond.
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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 phosphodiester bond? How it is formed?

  • Ans 1: The reaction between phosphate group of one nucleotide and hydroxyl group of another is a dehydration synthesis,eliminating a water molecule and forming a covalent bond between two groups. This linkage is called a phosphodiester bond.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

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 3

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 4

Question # 1

What are nucleotides?

  • Ans 1: Nucleotide is structural unit of DNA. It composed of nitrogenous base,pentose sugar and phosphate group.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

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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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

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

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