Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202625 April 2026Evening ShiftBiologyMolecular Basis of InheritanceActual

Match 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 repressor (B) Operator gene (II) Codes for repressor (C) Promoter gene (III) Codes for enzyme (D) Regulator gene (IV) Binding site for RNA polymerase Choose the correct option.

Options

  1. AA-II, B-III, C-I, D-IV
  2. BA-III, B-I, C-II, D-IV
  3. CA-III, B-IV, C-I, D-II
  4. DA-III, B-I, C-IV, D-II

Correct answer

D. A-III, B-I, C-IV, D-II

Step-by-step solution

The structural gene codes for the enzymes required for the metabolic pathway. The operator gene serves as the binding site for the repressor protein, which regulates the transcription of the structural genes. The promoter gene is the specific DNA sequence where RNA polymerase binds to initiate transcription. The regulator gene codes for the repressor protein that binds to the operator region. Therefore, the correct matching is A-III, B-I, C-IV, D-II. Answer: A-III, B-I, C-IV, D-II

Practice Molecular Basis of Inheritance on Quantrex Academy →

More from Molecular Basis of Inheritance

A 340 Å long segment of DNA molecule has 40 thymine nitrogenous bases, what will be the number of guanine bases in the same segment? 2026The enzyme / proteins that prevent/s recoiling of the separated strands of DNA during replication is __________. 2026Given below are two statements: Statement I - Avery, Mc Carty and Mac Leod first evidenced to prove the DNA is a genetic material. Statement II - Hershey and Chase used Streptococc 2026Formation of peptide bond between amino acids during translocation is catalyzed by __________. 2026In lac operon, which of the following acts as inducer and bind to repressor? 2026Wobble hypothesis is useful to explain the __________ property of genetic code. 2026Part of gene that is transcribed but NOT translated is __________. 2026Two different amino acids will never be encoded by the same codon, which property of genetic code does this represent? 2026 Full Molecular Basis of Inheritance list All MHT CET Medical PYQs