In prokaryotes IF-2 binds to (1) Initiator t-RNA and GTP (2) Amino acyl t-RNA and ATP (3) Ribosome and m-RNA (4) m-RNA and 30 S subunit of ribosome Introduction Protein […]
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CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Lac Operon Regulation By High cAMP, Allolactose and CAP Activity
6. The lac operon in E. coli. is controlled by both the lac repressor and the catabolite activation protein CAP. In an in vivo experiment with lac operon, the following […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Eukaryotic Translation Initiation: Beyond eIF2 and Met-tRNA
For translation initiation process besides elF2, Met-t- RNA eukaryotic 80-S ribosome also requires (1) GTP (2) ATP (3) CTP (4) UTP Introduction Translation initiation in eukaryotes is a highly regulated […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
E. coli Lac Operon Both Positively and Negatively Regulated
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 […]
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 […]
