22. Bacteriophage λ and Pl are both temperate phages. Which one of the following statements made about these phages and their lytic and lysogeny cycles in E. coli is INCORRECT? […]
Tag: VIRAL GENE REGULATION PYQ
VIRAL GENE REGULATION PYQ
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CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How CI and Cro Proteins Regulate Gene Expression via OR1, OR2, and OR3 in Bacteriophage Lambda
21. Bacteriophage λ proteins, Cl and Cro are crucial regulators of the lysogeny and lytic cycles of the bacteriophage. These proteins bind to the rightward operator region consisting of OR1, […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Infection Dynamics of Recombinant Lambda Phage Carrying P22 Repressor Genes in E. coli Overproducing Lambda Repressor
20. The lambda (λ) and P22 phages are two related lambdoid bacteriophages. A recombinant lambda phage (λMut) was derived from the wild type lambda phage (λWT) by replacing its Cl […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Role of Hfl Protease in Regulating the Lytic-Lysogeny Switch of Bacteriophage Lambda
19. Insertion lambda vectors are used to create cDNA libraries, In some insertion vectors, the site of insertion is within the cl gene. The, recombinants which are cl–can then be […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
key-molecular-players-in-bacteriophage-lambdas-lysis-lysogeny-decision-ci-cii-and-cro-explained
18. Given below are a few statements about the A infection cycle A. Competition between cl and Cll gene products determines the establishment of lysogeny versus lysis. B. cl binds […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Key Regulatory Features of Bacteriophage Lambda: Repressor Function and Operator Mutations Explained
17. Bacteriophage λ, has two modes in its life cycle. Lytic and lysogenic. In the lysogenic mode, the expression of all the phage genes are repressed while the expression of […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
How Bacteriophage Lambda Integrates and Excises Its Genome: Roles of Int, Xis, and Host Factors
16. Bacteriophage λ is a temperate phage. Immediately after infection, viral specific mRNAs for N and Cro proteins are expressed followed by early mRNAs. At the commitment phase, either lytic […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Decoding Plaque Morphology of Lambda Phage Mutants: Clear and Turbid Plaques Explained
15. The statements given below refer to the lambda phage. A. Clear plaques are formed in Q mutants B. No plaques are formed in nut mutants C. Clear plaques are […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Key Regulatory Proteins and Their Roles in Gene Expression Control During Bacteriophage Lambda Infection
14. Bacterophageλgenetic circuit may be represented as follows: The control of gene expression occurred during the phage infection may be described as follows: (A) N and Q protein act as […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding the Genetic Control Mechanism of Bacteriophage Lambda’s Lytic and Lysogenic Cycles
13. Bacteriophage λ is a temperate bacteriophage and has two modes in its life cycle, lysogenic and lytic. Several genes are involved in these two processes like N, cl, cll, […]
