7. During DNA replication, events at the replication fork require different types of enzymes having specialized functions except (1) DNA polymerase III (2) DNA gyrase (3) DNA ligase (4) DNA […]
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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, […]
CSIR NET Life Science Previous Year Questions and Solution on DNA REPLICATION
Why Temperature-Sensitive Mutations Are Crucial for Studying Essential Genes in Molecular Biology
6. Temperature sensitive mutation are importantin molecular biology because it helps in studying functions of (1) genes for heat stress (2) genes for cold stress (3) genes necessary for survival […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding the Dual Role of Regulatory Proteins: How Lambda CI Repressor Acts as Both Activator and Repressor
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 […]
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 DNA REPLICATION
Why Conditional Mutations Are Most Suitable for Studying Regulation of DNA Replication and Other Molecular Phenomena
5. Which of the following mutation is most suitable for study of regulation important molecular phenomenon of cell like DNA replication? (1) Gain of function (2) Loss of function (3) […]
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 DNA REPLICATION
Which Radioisotope Is Used to Label Thymine in DNA Replication Studies?
4. Which radioisotope isgenerally incorporated in thymine to studyDNA replication process? (1) 32p (2) 35S (3)3H (4) 14C Introduction Studying DNA replication requires precise labeling of newly synthesized DNA […]
