14. Actinomycin D inhibits the process of transcription in both prokaryotic and eukaryotic organisms. The following statements are made about actinomycin D-mediated inhibition of transcription: (1) Actinomycin D inhibits transcription […]
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CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Escherichia coli RNA polymerase α2ββ’ω Components rifampicin
13. Which one of the following statements is NOT a correct feature of Escherichia coli RNA polymerase? (1) Presence of the σ subunit along with α2ββ’ω core RNA polymerase is […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How Bacteria Adapt to Environmental Changes: Mechanisms of Gene Regulation Explained”
How Bacteria Adapt to Environmental Changes: Mechanisms of Gene Regulation Explained 12. One of the mechanism is used by bacteria for adaptation to changed environment is altering transcription of […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Role of Sigma (σ) Subunit in E. coli RNA Polymerase: Function, Mechanism
Role of Sigma (σ) Subunit in E. coli RNA Polymerase: Function, Mechanism 11. σ subunit of E. colt RNA polymerase DOES NOT (1) initiate transcription and fall off during elongation […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Which RNA Polymerase Subunit Is Released After Transcription Initiation in Prokaryotes? | CSIR NET Life Science MCQ
10. In prokaryotes which subunit of RNA polymerase is released after transcription initiation process? (1) α (2) β (3) β’ (4) σ MCQ: In prokaryotes, which subunit of […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Which RNA Polymerase Subunit Is Essential for Transcription Initiation? | CSIR NET Life Science MCQ
9. Mutation in which subunit of RNA polymerase holoenzyme would have defect in correct initiation of transcription? (1) α subunit (2) β subunit (3) β’ subunit (4) σ-subunit Mutation in […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Which Factor Ensures Stable Binding of RNA Polymerase to the Promoter? | CSIR NET Life Science MCQ
8. Which one of the following ensures stable binding of RNA polymerase at the promoter site? (1) DNA photolyase (2) Sigma factor (3) DNA glycosylase (4) Rec A Which one […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
What Is the Role of Sigma Factor σ⁷⁰ in E. coli? | CSIR NET Life Science MCQ Explained
7. Presence of sigma factor (σ70) in Escherichia colt facilitates (1) Sequence specific localization of RNA polymerase on the promoter regions of genes (2) Phosphorylation of C-terminal tail of RNA […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Which Sigma Factor Mutation Affects Thermal Stress Adaptation in E. coli? | CSIR NET Life Science MCQ
6. A mutation in which one of the following sigma factors may be a possible cause for E. colt failing to adapt in response to thermal stress? (1) σ70 (2) […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Which Sigma Factor Controls the Heat-Shock Response in Bacteria? | CSIR NET Life Science MCQ Explained
5. In bacteria, heat-shock response is primarily controlled by (1) Sigma S (σs) (2) Sigma 32 (σ32) (3) ma E (σE) (4) Sigma 70 (σ70) MCQ: In Bacteria, the […]
