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 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 1

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 2

Question # 1

How many DNA polymerases are found in prokaryotes? Write their names.

  • Ans 1: There are three DNA polymerases namely I,II and III in bacteria.
    i) DNA polymerase I ii) DNA polymerase II iii) DNA polymerase III
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Differentiate between pyrimidines and purines.

  • Ans 1: Pyrimidines: Pyrimidines are nitrogenous bases present in nucleic acids,having only single ringed structure which is only six cornered.
    Examples: Cytosine,Thymine and uracil.
  • Ans 2: Purines: Purines are another type of nitrogenous bases present in nuclei acids having double ringed structure. One ring issoc cornered while second is of five cornered.
    Example: Adenine & Guanine.
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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

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.
Submit

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

Question # 1

Name types of RNA.

  • Ans 1: There are three types of RNA,which are named as

  • Ans 2: i) Transfer RNA or tRNA, ii) Messenger RNA or mRNA, iii) Ribosomal RNA or r RNA.
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12th Class Biology Chapter 20 Short Questions

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