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 gene?

  • Ans 1: The sequence of nucleotides that determines the amino acid sequence of a protein is called gene.
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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 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 2

Question # 1

Differentiate between template and coding stands of DNA.

  • Ans 1: Template Strand: The strand of DNA which is transcribed is called template strand or antisense strand.
  • Ans 2: Coding Strand: The Strand of DNA which is not transcribed is called coding strand or sense strand.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define central Dogma.

  • Ans 1: Central Dogma means all the organisms use the same basic mechanism of gene expression which is referred to as Central Dogma.
  • Ans 2: Central Dogma consists of two steps
    a) Transcription:synthesis of mRNA from DNA
    b) Translation: Synthesis of protein from mRNA.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

Enlist non sense codons and their function.

  • Ans 1: Non sense condons do not specifiy any amino acid. They are used to terminate or to stop the protein synthesis.Their names are UAA,UGA and UGA.
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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 the difference between R, and S, type of bacteria?

  • Ans 1: R From: The mutant from of streptococcus pneumoniae bacteria,which lacks an enzyme needed to manufacture the polysaccharide coat is called the R form because it forms R colonies.On growth medium.
  • Ans 2: S From: The normal pathogenic form of streptococcus pneumoniae bacteria is referred as the S from because it forms smooth colonies on a culture dish.
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12th Class Biology Chapter 20 Short Questions

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