Which one of the following regulatory proteins can act as a positive and negative regulator on binding to the same DNA elements? (1) Lac repressor (Lacl) (2) Lambda (Cl) repressor […]
Tag: VIRAL GENE REGULATION PYQ
VIRAL GENE REGULATION PYQ
No posts found.
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
The Dual Role of Lambda Phage CI Protein as Both Activator and Repressor of Transcription
11. Which one of the following A proteins acts both as an activator and repressor of transcription? (1) cl protein (2) N protein (3) Cll protein (4) Q protein Discover […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Why CI is On and Cro is Off During the Lysogenic Cycle of Lambda Phage
10. In the lysogenic λ-phage (1) both Cl and Cro are on. (2) both Cl and Cro are off (3) Cl is on while Cro is off. (4) Cl is […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Why the Lysogenic Cycle Offers Survival Advantages to Viruses Over the Lytic Cycle
9. Why lysogenic cycle is more beneficial to a virus than lytic cycle under certain circumstances? (1) The Lysogenic cycle prevent local extinction of host while still retaining infectious potential […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding Temporal Gene Expression in Phages: The Role of Sigma Factors, Holoenzymes, and Transcription Factors
8. During development and differentiation, there is a dynamic programme of differential expression of sets of genes. In bacteria, phage infections are among the simplest examples of developmental process. Typically, […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding Which Lambda Phage Mutant Gene Produces Clear Bacterial Plaques
7. Among the following in which mutant gene of l phages will form clear bacterial plaques (1) cl– (2) cro- (3) INT– (4) XIS– Explore how mutations in the lambda […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How UV Radiation Induces Lambda Prophage from Lysogenic E. coli Cultures
6. A culture of an E. coli strain that is lysogenic for phage lambda is grown at 320C Induction of the prophage from the host chromosome will occur when the […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How Bacteriophage T4 Hijacks Host RNA Polymerase for Viral Gene Transcription in E. coli
5. T4 bacteriophage after infecting E. coli generally hijack host machinery for transcription of its own genes. It is done by (1) Degrading host RNA polymerase (2) Modifying host RNA […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How Bacteriophage T4 Transcribes Viral Genes Immediately After Infection
4. Bacteriophage T4 transcribe the viral genes immediately after infection using (1) host RNA polymerase. (2) viral RNA polymerase. (3) modified host RNA polymerase. (4) RNA transcriptase. Discover how bacteriophage […]
