In E. coli lac operon is positively as well as negatively regulated. This suggest that (1) E. coli rely only on glucose for energy (2) E. coli rely only on […]
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CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Minimum Number of NTPs Required for One Peptide Bond
What is the minimum number Of NTPs required for the formation of one peptide bond during protein synthesis? (1) One (2) Two (3) Four (4) Six Introduction Protein synthesis is […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Glucose and Lactose Regulation in the Lac Operon in E. coli
Which one of the following conditions will switch on Lac operon in E. coli? (1) + Glucose, + Lactose (2) + Glucose, – Lactose (3) – Glucose, – Lactos (4) […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
During Each Cycle of elongation in Translation Ribosome Undergo conformational changes
During each cycle of chain elongation in translation, how many conformational changes does the ribosome undergo that are coupled to GTP hydrolysis? (1) Zero (2) one (3) Two (4) Three […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Lac Repressor Binding to Operator in the Lac Operon
In Lac operon, if lac repressor binds to operator it will lead to (1) Switch on transcription (2) Switch off transcription (3) Enhanced transcription (4) Differential gene expression Gene […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
The mRNA Sequence and Its Translation Direction
If a sequence 5’- AAA(AAA)nAAAAAC-3′ was transcribed in cell free system and peptide obtained was partially hydrolyzed with carboxypeptidase, the result was an Asparagine residue and oligopeptide. It suggest the […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
What Happens When an Inducer Binds to a Repressor
If inducer binds to repressor, it will prevent (1) Transcription (2) Binding of RNA polymerase to promoter (3) Binding of repressor to operator (4) Binding of repressor to promoter Gene […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Process Does Not Occur in the Nucleus | Transcription
Among the following which process do not occur in nucleus (1) Replication(2) Transcription (3) Translation (4) Repair The cell nucleus is the command center of eukaryotic cells, orchestrating a variety […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Operator Binding Efficiency of Repressor Protein and Operon Gene Expression
If mutation in regulatory gene increases 1000 fold operator binding efficiency of repressor protein, under such condition, which is true for operon? (1) No expression of operon genes (2) Basal […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Why tRNAs Contain Thymine: Mechanisms and Modifications Explained
The following statements are made with reference to the fact that tRNAs are known to possess T in their sequence. A. RNA polymerase Ill utilizes TTP as one of the […]
