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

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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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

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.
Submit

12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Briefly describe replication of lagging strand of DNA.

  • Ans 1: Lagging strand replicates away from the replication fork. It is synthesized discontinuously as a series of short segments that are later connected.These fragments are called Okzaki fragmernts.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

what is a phosphodiester bond?

  • Ans 1: The reaction between the phosphate group of one nucleotide and the hydroxyl group of another is a dehydration synthesis,eliminating a water molecule and forming covalent bond that links the two groups.The linkage is called a phosphodiester bond.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

Where codon and anticodon are situated?

  • Ans 1: Codon are situated on mRNA(messenger RNA) while anticodon are situated on tRNA(transfer RNA).

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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

Differentiate between transcription and translation.

  • Ans 1: Transcription: it is the first step of protein synthesis,in transcription mRNA is synthesized from DNA.
  • Ans 2: Translation: It is the second step of protein synthesis in which DNA message for protein synthesis is decoded and polypeptide chain is synthesized.
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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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