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

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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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

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 2

Question # 1

Define Euchromatin.

  • Ans 1: The part of DNA is expressed time to time and condensed only during the cell division is called euchromatin. This coiling helps in movement of chromosomes during cell division.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define initiation codon. What does it codes for?

  • Ans 1: Initiation codon is first codon in the process of protein synthesis from where protein synthesis starts.It codes for methionine.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

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 5

Question # 1

What are mutagens? Give one example.

  • Ans 1: In genetics,a mutagen is a physical or chemical agent that changes the genetic material,usually DNA of an organism and thus increases the frequency of mutations.
    For Example: X-ray,ultraviolet radiations etc.
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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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