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 nucleosome? Or Define nucleosome.

  • Ans 1: The DNA duplex is coiled around eight histone proteins forming a complex known as a nucleosome. It appears like beads on a string.
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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 nucleosome? Or Define nucleosome.

  • Ans 1: The DNA duplex is coiled around eight histone proteins forming a complex known as a nucleosome. It appears like beads on a string.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Define sense & antisense strands of DNA?

  • Ans 1: The strand of DNA which is transcribed is called template or antisense strand and the opposite strand is called sense strand.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

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 4

Question # 1

What is gene?

  • Ans 1: The sequence of nucleotides that determines the amino acid sequence of a protein is called gene.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Differentiate between semi conservative replication and conservative replication.

  • Ans 1: Semi Conservative Replication: The two strands of double helix of DNA separate out acting as a model or template,along which new nucleotide are arranged thus giving rise to two new DNA duplexes.
  • Ans 2: Conservative Replication: This model states that the parental double helix would remain intact and generate DNA copies consisting of entirely new molecule.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

What is translation? Or Define translation.

  • Ans 1: Synthesis of protein from the mRNA is called translation.It is second step of central dogma.
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12th Class Biology Chapter 20 Short Questions

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