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

Give the chemical composition of RNA.

  • Ans 1: RNA is composed of nitrogen bases (adenine.guanine,cytosine and uracil),pentose sugar(ribose) and phosphate group.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 1

Question # 1

Give the chemical composition of RNA.

  • Ans 1: RNA is composed of nitrogen bases (adenine.guanine,cytosine and uracil),pentose sugar(ribose) and phosphate group.
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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 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 4

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 5

Question # 1

Compare telocentric and acrocentric chromosomes.

  • Ans 1: Telocentric Chromosomes:Telocentric has centromere at one end and chromatid part is present at other end.
  • Ans 2: Acrocentric Chromosomes: Acrocentric has two unequal arms one is short and other is long.
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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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