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Zoology - Molecular Basis of Inheritance

Practise 43 AIIMS previous year questions on Molecular Basis of Inheritance, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Molecular Basis of Inheritance has been asked in 18 of the 19 years of AIIMS papers analysed (2001–2019), with 43 questions in all. 44% of them were easy, 42% moderate and 14% tough. Most of its questions came from 2018, with 6 questions that year. In the last three years (2017–2019) it had 13 questions across 5 papers, about 2.6 per paper.

The chapter's 12 topics are not weighted equally: Genetic Code (11 questions, 26%), Structure of DNA (8 questions, 19%), and Transcription (6 questions, 14%) have been asked the most. Translation has produced the most tough questions (2).

  1. 1Which of the following switches off lac operon?26 May, 2019Regulation of Gene Expression
  2. 2Identify A, B and C.25 May, 2019Transcription
  3. 3The group of codons which codes for alanine is25 May, 2019Genetic Code
  4. 4Who discovered DNA fingerprinting?25 May, 2019DNA Fingerprinting
  5. 5Assertion : In eukaryotes, both intron and exon are transcribed to form hnRNA. Reason : Splicing is required in prokaryotes.25 May, 2019Transcription
  6. 6Find out the incorrect match.27 May, 2018Transcription
  7. 7Percentage of recombination between and is and is and is , then the arrangement of genes is27 May, 2018Regulation of Gene Expression
  8. 8Codons of alanine are27 May, 2018Genetic Code
  9. 9Which of the following is a non-sense mutation?26 May, 2018Genetic Code
  10. 10Which of the following statements is correct regarding eukaryotic translation?26 May, 2018Translation
  11. 11Assertion: Amber codon is a termination codon. Reason : If in RNA, a termination codon is present, the protein synthesis stops abruptly whet26 May, 2018Genetic Code
  12. 12Refer to the given figure and select the correct option regarding its parts labelled as A, B and .2017Packaging of DNA Helix
  13. 13Match the triplet codons listed in column I with their amino acids mentioned in column II and select the correct option from the given codes2017Genetic Code
  14. 14In a long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases?2016Structure of DNA
  15. 15If the sequence of bases in the coding strand of a double stranded DNA is 5'-GTTCGAGTC-3', the sequence of bases in its transcript will be2016Transcription
  16. 16Which one of the following is an incorrect combination?2015Structure of DNA
  17. 17Which organism is used to transfer T-DNA?2015Structure of T-RNA
  18. 18Which of the following set of options is used in translation?2015Translation
  19. 19DNA and RNA comprise of2014Structure of DNA
  20. 20Assertion : One codon may code for more than one amino acid. Reason: A codon is degenerate and ambiguous.2014Genetic Code
  21. 21Chromatin is made up of:2013Structure of DNA
  22. 22Assertion : Only a boy child could be born with a substitution of glutamic acid by valine on codon of beta-chain of haemoglobin. Reason : Th2013Translation
  23. 23Which of the following cartoon characters does not share its name with that of a gene?2012Structure of DNA
  24. 24Which one of the following options is a correct match of phenomenon and its explanation?2011Central Dogma
  25. 25Which of the following is correct regarding genetic code?2010Genetic Code
  26. 26Assertion : DNA fingerprinting involves identifying differences in specific regions in DNA sequence. Reason : DNA fingerprinting is the basi2010DNA Fingerprinting
  27. 27What is incorrect about the following figure representing DNA replication?2009Replication
  28. 28The binding site of RNA with RNA \& amino acids respectively are2009Structure of T-RNA
  29. 29Which statement is true?2007Structure of DNA
  30. 30During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, f2006Genetic Code
  31. 31cDNA probes are copied from the messenger RNA molecules with the help of2005Transcription
  32. 32Assertion : Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason : is transferred from the nuc2005Replication
  33. 33The total number of nitrogenous bases in human genome is estimated to be about2004Structure of DNA
  34. 34Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?2004Genetic Code
  35. 35What is true about RNA?2003Structure of T-RNA
  36. 36Which one of the following correctly represents the manner of replication of DNA?2003Replication
  37. 37Which one of the following codons codes for the same information as UGC?2003Genetic Code
  38. 38A point mutation comprising the substitution of a purine by pyrimidine is called2002Properties of Genetic Material
  39. 39Wobble hypothesis was given by2002Genetic Code
  40. 40Assertion : The RNA attaches itself to the ribosome via its end. Reason : The RNA has F-capsular nucleotide and bases of lagging sequence.2002Transcription
  41. 41In RNA thymine is replaced by2001Properties of Genetic Material
  42. 42In prokaryotes, genetic recombination can occur during2001The Search for Genetic Material
  43. 43Assertion : Watson and Crick provided experimental proof of semiconservative nature of DNA relication. Reason : DNA polymerase binds nucleot2001Structure of DNA

Frequently Asked Questions

1.How many questions are available for Molecular Basis of Inheritance?

This chapter includes 43 questions compiled from AIIMS papers spanning 2001 to 2019.

2.Are these questions only from AIIMS, or from other exams too?

These are AIIMS questions specifically for the Molecular Basis of Inheritance chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Molecular Basis of Inheritance an important chapter for AIIMS Zoology?

Molecular Basis of Inheritance has appeared in 18 of the 19 years of AIIMS papers covered here, with 43 questions across 20 papers - about 2 per paper it appears in.

4.What is the difficulty level of Molecular Basis of Inheritance questions in AIIMS?

Of the 43 questions analysed for this chapter, 44% are easy, 42% moderate and 14% tough. 2018 had the most, with 6 questions.

5.Which topics in Molecular Basis of Inheritance should I focus on?

These topics have carried the most weightage in Molecular Basis of Inheritance:

  • Genetic Code - 11 questions (26%)
  • Structure of DNA - 8 questions (19%)
  • Transcription - 6 questions (14%)
  • Translation has produced the most tough questions (2).
6.Is Molecular Basis of Inheritance's weightage in AIIMS going up or down?

Across all 20 papers analysed, Molecular Basis of Inheritance has averaged about 2.1 questions per paper. In the last three years (2017–2019), that average has risen, at about 2.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.