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  • PYQs (GS & Optional)
  • (a) Modern concept of gene, split gene, genetic regulation, genetic code.

    • Modern concept of gene
      • What is an Operon? Explain how a polycistronic structural gene is regulated by a common promoter and a combination of regulatory genes in a lac-operon.
      • What is modern concept of gene? Describe the test of allilism with suitable example.
      • Ribonucleic acid (RNA) and Deoxyribonucleic acid (DNA)
    • What is interrupted gene? What is its relation with exons and introns? Explain the functioning of interrupted gene in lower eukaryotes.
    • Genetic regulation
      • Lamarckism.
      • Discuss the factors regulating gene action.
    • Genetic code
      • What is meant by genetic dictionary? Explain the concept of degeneracy of genetic code.
      • Briefly explain the contributions of George Gamow, Har Gobind Khorana, Marshall Nirenberg and Severo Ochoa in deciphering the genetic code.
      • What is Wobble hypothesis? How does it explain degeneracy in genetic code?
      • What are the salient features of the genetic code? Write the nonsense codons and their theoretical anticodons.
      • Characterize with suitable examples, the following features of genetic code: (i) Degeneracy. (ii) Universality of genetic code and add a note on-Wobble hypothesis.
  1. PYQs and Practice Questions
  2. UPSC Optionals
  3. Zoology Optional
  4. Genetics
  5. (a) Modern concept of gene, split gene, genetic regulation, genetic code.
  6. Genetic code

What are the salient features of the genetic code? Write the nonsense codons and their theoretical anticodons. (UPSC 2019, 8 Marks, )

  1. Posted by: Synopsis IAS
  2. Posted on:31 July 2025
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आनुवंशिक कोड की प्रमुख विशेषताएँ क्या हैं? बकवास कोडन और उनके सैद्धांतिक एंटीकोडन लिखें। (What are the salient features of the genetic code? Write the nonsense codons and their theoretical anticodons.)
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