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Biology - Molecular Basis of Inheritance

Practise 54 MHT-CET (PCB) previous year questions on Molecular Basis of Inheritance, compiled from papers in 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty MHT-CET (PCB) tests.

Molecular Basis of Inheritance has been asked in 1 of the 1 years of MHT-CET (PCB) papers analysed (2026), with 54 questions in all. 44% of them were easy, 56% moderate and 0% tough. Most of its questions came from 2026, with 54 questions that year. In 2026 it had 54 questions across 11 papers, about 4.9 per paper.

The chapter's 12 topics are not weighted equally: Replication (10 questions, 19%), DNA Fingerprinting (8 questions, 15%), and Transcription (6 questions, 11%) have been asked the most.

  1. 1In lac operon, which of the following acts as inducer and bind to repressor?26 Apr, 2026 (M)Regulation of Gene Expression
  2. 2Wobble hypothesis is useful to explain the __________ property of genetic code.26 Apr, 2026 (M)Genetic Code
  3. 3Given below are two statements: Statement I - Avery, Mc Carty and Mac Leod first evidenced to prove the DNA is a genetic material. Statement26 Apr, 2026 (M)The Search for Genetic Material
  4. 4The enzyme / proteins that prevent/s recoiling of the separated strands of DNA during replication is __________.26 Apr, 2026 (M)Replication
  5. 5E. coli cells infected with bacteriophages having radioactive phosphorus are grown on medium containing normal phosphorus and sulphur and th26 Apr, 2026 (M)The Search for Genetic Material
  6. 6In Homo sapiens , the estimated gene number is ________.25 Apr, 2026 (M)Human Genome Project
  7. 7During replication of DNA, formation of new strand takes place ____________.25 Apr, 2026 (M)Replication
  8. 8The two strands in a DNA molecule are ________ .25 Apr, 2026 (M)Structure of DNA
  9. 9Wobble hypothesis explains which one of the following properties of genetic code?25 Apr, 2026 (M)Genetic Code
  10. 10In their experiment to prove DNA replication is semi-conservative, Meselson and Stahl used 6M because the density gradient value of 6M is __25 Apr, 2026 (M)Replication
  11. 11Formation of peptide bond between amino acids during translocation is catalyzed by __________.25 Apr, 2026 (E)Translation
  12. 12A long segment of DNA molecule has thymine nitrogenous bases, what will be the number of guanine bases in the same segment?25 Apr, 2026 (E)Structure of DNA
  13. 13Given below are two statements: Statement I - The unit of DNA, in which replication occur is called replicon. Statement II - In eukaryotes, 25 Apr, 2026 (E)Replication
  14. 14Part of gene that is transcribed but NOT translated is __________.25 Apr, 2026 (E)Transcription
  15. 15Match the gene in Column I with its role in Column II. Column I (Gene) Column II (Role of gene) (A) Structural gene (I) Binding site for rep25 Apr, 2026 (E)Regulation of Gene Expression
  16. 16Two different amino acids will never be encoded by the same codon, which property of genetic code does this represent?25 Apr, 2026 (E)Genetic Code
  17. 17The nucleotide sequence of anticodon is complementary to nucleotide sequence present on________.24 Apr, 2026 (M)Genetic Code
  18. 18If the number of adenine nitrogenous base in a given DNA segment is 25 and the number of guanine is 45, What would be the total number of nu24 Apr, 2026 (M)Structure of DNA
  19. 19During replication the enzyme that forms double helix to form daughter DNA molecule is ___________.24 Apr, 2026 (M)Replication
  20. 20In protein synthesis, during elongation of a polypeptide chain, the charged tRNA carrying the aminoacid is received at ___ site and uncharge24 Apr, 2026 (M)Translation
  21. 21The repressor protein in lac operon is produced by the action of ________.24 Apr, 2026 (M)Regulation of Gene Expression
  22. 22Along with Histone like DNA binding proteins which enzyme maintains supercoiled state in packaging of DNA in prokaryotes?24 Apr, 2026 (M)Packaging of DNA Helix
  23. 23Given below are two statements. Statement I - RNA acts as biocatalyst and catalytic RNA is ribozyme. Statement II - Due to repeated replicat24 Apr, 2026 (M)Properties of Genetic Material
  24. 24The transforming principle in Griffith's experiment was detected _______.24 Apr, 2026 (E)The Search for Genetic Material
  25. 25During DNA replication, Okazaki fragments are used to elongate _________.24 Apr, 2026 (E)Replication
  26. 26Match the terms in List I with their correct descriptions in List II and choose the correct option. List I List II (A) Splicing (I) Polyaden24 Apr, 2026 (E)Transcription
  27. 27Which of the following step in DNA fingerprinting involves the movement of negatively charged DNA fragments to the positive pole?24 Apr, 2026 (E)DNA Fingerprinting
  28. 28Given below are two statements: Statement (I): The Human genome Project aims at transfering the related technologies to the private sectors,24 Apr, 2026 (E)Human Genome Project
  29. 29What is the role of the DHU arm of a tRNA molecule?24 Apr, 2026 (E)Structure of T-RNA
  30. 30In the chromosomes, DNA is associated with histone and non-histone proteins. This was reported in 1974 by -----------------.23 Apr, 2026 (M)Packaging of DNA Helix
  31. 31Meselson and Stahl proved the semi-conservative nature of DNA replication using the isotope ___.23 Apr, 2026 (M)Replication
  32. 32Select the INCORRECT statement with respect to coding strand.23 Apr, 2026 (M)Transcription
  33. 33Select the INCORRECT statement from the following related to HGP.23 Apr, 2026 (M)Human Genome Project
  34. 34As in rDNA technology, in DNA fingerprinting, also, all the following techniques are used EXCEPT:23 Apr, 2026 (M)DNA Fingerprinting
  35. 35During replication of DNA, each separated parent DNA strand acts as ___________.23 Apr, 2026 (E)Replication
  36. 36Identify the correct features of the genetic code. i. It is a triplet code. ii. It shows distinct polarity. iii. It is overlapping. iv. The 23 Apr, 2026 (E)Genetic Code
  37. 37Given below are two statements about DNA fingerprinting. Statement (I): The DNA probe used in DNA fingerprinting is a dsDNA obtained from or23 Apr, 2026 (E)DNA Fingerprinting
  38. 38In DNA, 20-100 base pairs which vary in every human being form ___________.23 Apr, 2026 (E)DNA Fingerprinting
  39. 39Which one of the following is INCORRECT about DNA fingerprinting?22 Apr, 2026 (M)DNA Fingerprinting
  40. 40Match List I with List II List I (Binding site of ribosome) List II (Substances associated) (A). P-site (I). Amino-acetyl tRNA (B). A-site (22 Apr, 2026 (M)Translation
  41. 41A promoter in a transcription unit is a DNA sequence ________.22 Apr, 2026 (M)Transcription
  42. 42Which one of the following experiments by Griffith with Streptococcus pneumoniae , resulted in the death of mice due to pneumonia?22 Apr, 2026 (E)The Search for Genetic Material
  43. 43Identify the correct order of the following enzymes used during the process of replication of eukaryotic DNA. (A). DNA polymerase (B). DNA l22 Apr, 2026 (E)Replication
  44. 44Given below are two statements regarding Lac operon. Statement (I): In Lac operon, in the absence of lactose, repressor protein binds to the22 Apr, 2026 (E)Regulation of Gene Expression
  45. 45The DNA probe used in DNA fingerprinting consists of ____(A)____ and labeled with ____(B)____. Choose the correct options for (A) and (B) re22 Apr, 2026 (E)DNA Fingerprinting
  46. 46In a DNA strand, the nucleotides are linked together by-----------.21 Apr, 2026 (M)Structure of DNA
  47. 47Hershey-Chase performed an experiment on------------------.21 Apr, 2026 (M)The Search for Genetic Material
  48. 48The enzyme that facilitates local unwinding of DNA duplex during transcription is-------------------.21 Apr, 2026 (M)Transcription
  49. 49Match List I with List II List I (Enzymes involved in DNA replication) List II (Function.) (A) Helicase (I) Forms double helix to form daugh21 Apr, 2026 (M)Replication
  50. 50Given below are two statements: Statement (I): DNA fingerprinting technique involves identifying similarities in VNTRs. Statement (II): The 21 Apr, 2026 (M)DNA Fingerprinting

Frequently Asked Questions

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

This chapter includes 54 questions compiled from MHT-CET (PCB) papers in 2026.

2.Are these questions only from MHT-CET (PCB), or from other exams too?

These are MHT-CET (PCB) questions specifically for the Molecular Basis of Inheritance chapter. Questions from other exams like NEET or AIIMS are organised separately under their respective exam sections.

3.Is Molecular Basis of Inheritance an important chapter for MHT-CET (PCB) Biology?

Molecular Basis of Inheritance has appeared in 1 of the 1 year of MHT-CET (PCB) papers covered here, with 54 questions across 11 papers - about 5 per paper it appears in.

4.What is the difficulty level of Molecular Basis of Inheritance questions in MHT-CET (PCB)?

Of the 54 questions analysed for this chapter, 44% are easy, 56% moderate and 0% tough. 2026 had the most, with 54 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:

  • Replication - 10 questions (19%)
  • DNA Fingerprinting - 8 questions (15%)
  • Transcription - 6 questions (11%)
6.Is Molecular Basis of Inheritance's weightage in MHT-CET (PCB) going up or down?

Across all 11 papers analysed, Molecular Basis of Inheritance has averaged about 4.9 questions per paper. In 2026, that average has stayed about the same, at about 4.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.