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 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 Preparation - Set 1

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 Preparation - Set 2

Question # 1

Differentiate between heterochromatin and euchromatin.

  • Ans 1: Heterochromatin:Highly condensed part of chromatin is called heterochromatin. This part remains permanently condensed and never be expressed.
  • Ans 2: Euchromatin:The part of chromatin other than heterochromatin is called euchromatin. It condenses only during cell division,when compact packaging facilitates the movement of chromosomes.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Differentiate between chromosome and nucleosome.

  • Ans 1: Chromosome: Chromosome are thread like structures which appear inside the nucleus at the time of cell division. They are.composed of DNA and protein. They carry the genes on them.
  • Ans 2: Nucleosomes: 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 4

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 5

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 6

Question # 1

Give chromosomal theory of inheritance.

  • Ans 1: According to this theory,genes are located on chromosomes. At the time of cell division all the genes which are present on a chromosome,will go to same cell in which cell chromosome is transported.
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12th Class Biology Chapter 20 Short Questions

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