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 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 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

Differentiate between sense and anti sense strands of DNA.

  • Ans 1: Sense strand; The strand of DNA which is opposite to the antisense strand and is not transcribe is known as sense strand or coding strand.
  • Ans 2: Anti-sense strand: Only one of the two strands of DNA are transcribed. This strand is called template strand or the antisense strand
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define genetic code.Give its properties.

  • Ans 1: Genetic code is combination of three nucleotides,which specify a particular amino acid.
  • Ans 2: Properties of genetic code are:
    i) Genetic code is universal ii) Genetic code is coma less iii) Genetic cod is triplet.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

What is transformation?

  • Ans 1: When DNA of donor cell is inserted into recipient cell it changes the genetic material of recipient cell,this process is called transformation.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

What is phosphodiester linkage?

  • Ans 1: The reaction between the phosphate group of one nucleotide and the hydroxyl group of another is dehydration synthesis,eliminating water molecule and forming a covalent bond that links the two groups is called phosphodiester bond.
Submit

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

Question # 1

Differentiate between sense and anti sense strands of DNA.

  • Ans 1: Sense strand; The strand of DNA which is opposite to the antisense strand and is not transcribe is known as sense strand or coding strand.
  • Ans 2: Anti-sense strand: Only one of the two strands of DNA are transcribed. This strand is called template strand or the antisense strand
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12th Class Biology Chapter 20 Short Questions

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