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

Differentiate between codon and anticodon.

  • Ans 1: Codon: Codon is sequence of three nucleotides present on mRNA and specifies an amino acid.
    For Example codon for methionine is AUG.
  • Ans 2: Anti Codon: Anticodon is the sequence of three nucleotides present on tRNA,anti codon of metionine is UAC.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 1

Question # 1

Differentiate between codon and anticodon.

  • Ans 1: Codon: Codon is sequence of three nucleotides present on mRNA and specifies an amino acid.
    For Example codon for methionine is AUG.
  • Ans 2: Anti Codon: Anticodon is the sequence of three nucleotides present on tRNA,anti codon of metionine is UAC.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

How many chromosomes are present in mouse and sugar cane?

  • Ans 1: Sugar can has 80 while mouse has 40 chromosomes respectively.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

What is tRNA? Give its role.

  • Ans 1: tRNA is a type of RNA which is 70 to 90 nucleotides in length. It transfers amino acids during the protein synthesis to the place where protein is synthesized in the cell.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

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 5

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 6

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

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