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 Mutation.

  • Ans 1: The sudden change in DNA or gene is called mutation.
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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 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 2

Question # 1

Differentiate between transcription and translation.

  • Ans 1: Transcription: it is the first step of protein synthesis,in transcription mRNA is synthesized from DNA.
  • Ans 2: Translation: It is the second step of protein synthesis in which DNA message for protein synthesis is decoded and polypeptide chain is synthesized.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

What is one-gene one polypeptide hypothesis?

  • Ans 1: Beadle and tatum concluded that genes produce their effects by specifying the structure of enzymes and that each gene encodes the structure of one enzyme.They called this relationship one-gene/one-enzyme hypothesis.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

what is a phosphodiester bond?

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

What are Okazaki fragments? Also give their length.

  • Ans 1: During replication of DNA,one of its strands is discontinuously synthesized in the form of fragments called Okazaki fragments.Its length in eukaryotes is 100 to 200 nucleotides while in prokaryotes it is 1000 to 2000 nucleotides.
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12th Class Biology Chapter 20 Short Questions

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