Transcription — NEET Biology Questions

Practice 62 questions on Transcription from Molecular Basis of Inheritance (NCERT Class 12, Chapter 5). Free samples below — get all 62 in the app.

62 Questions Molecular Basis of Inheritance Class 12

Sample Questions — Transcription

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MCQ
Match the following:
  • a) A–II, B–III, C–I, D–IV
  • b) A–I, B–II, C–III, D–IV
  • c) A–III, B–II, C–I, D–IV
  • d) A–III, B–I, C–II, D–IV
✅ Correct Answer: D
Matches specific functions of each RNA polymerase and sigma factor.
MCQ
Why is promoter essential for transcription?
  • A. Binds terminator to terminate translation
  • B. Directs helicase to initiate replication
  • C. Provides site for RNA polymerase attachment
  • D. Acts as codon
✅ Correct Answer: C
Promoter region helps RNA polymerase recognize transcription start site.
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MCQ
The segment of DNA transcribed into RNA is known as:
  • A. Codon
  • B. Operon
  • C. Transcription unit
  • D. Anticodon
✅ Correct Answer: C
A transcription unit is defined from promoter to terminator.
MCQ
Which RNA polymerase in eukaryotes synthesizes pre-mRNA?
  • A. RNA polymerase I
  • B. RNA polymerase II
  • C. RNA polymerase III
  • D. DNA polymerase
✅ Correct Answer: B
It transcribes precursor of mRNA in eukaryotes.
MCQ
What is the role of the sigma (σ) factor in prokaryotic transcription?
  • A. Polymerizes nucleotides
  • B. Unwinds DNA
  • C. Initiates transcription
  • D. Adds 5’ cap
✅ Correct Answer: C
σ subunit is involved only in initiation and then dissociates.

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