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 gene?

  • Ans 1: The sequence of nucleotides that determines the amino acid sequence of a protein is called gene.
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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

What is gene?

  • Ans 1: The sequence of nucleotides that determines the amino acid sequence of a protein is called gene.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Write role of DNA ligase.

  • Ans 1: The function of DNA ligase is to fill the nicks (small gaps) or to join the Okazaki fragments to make a continuous strand of DNA.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Define transcription.

  • Ans 1: Syntheis of mRNA from the DNA is called transcription.It is first step of central dogma.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

What is phosphodiester bond? How it is formed?

  • Ans 1: The reaction between phosphate group of one nucleotide and hydroxyl group of another is a dehydration synthesis,eliminating a water molecule and forming a covalent bond between two groups. This linkage is called a phosphodiester bond.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

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 6

Question # 1

What is central Dogma? Give its two steps.

  • Ans 1: All organisms use the same basic mechanism of reading and expressing the genes,which is often referred to as central dogma.First step of central dogma is transcription and second step is translation (synthesis of protein from mRNA).
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12th Class Biology Chapter 20 Short Questions

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