Q.83 Nalidixic acid inhibits gyrase activity. Resistance to this antibiotic arises mainly due to(A) nonsense mutation in the gyrase gene (B) deletion mutation in the gyrase gene(C) missense mutation in […]
Blog
GATE Life Science 2012 Previous Year Papers with Solutions
Bacterial Species Atmospheric Nitrogen Fixation
Q.82 Which one of the following pairs of bacterial species fixes atmospheric Nitrogen?(A) Clostridia and Rhizobia(B) Clostridia and Lactobacillus(C) Rhizobia and Enterococcus(D) Actinomycetes and Mycoplasma The correct answer is (A) Clostridia […]
GATE Life Science 2012 Previous Year Papers with Solutions
E.coli Mutant Defective Enzyme
Q.81 An E.coli mutant defective for an enzyme is unable to grow on acetate but grows on glycerol as thesole carbon source. Which ONE of the following enzymes is likely to […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Scanning Probe Microscope Properties
28. Which property is measured with a scanning probe microscope? A. Magnetism B. Electric resistance C. Light absorption D. All of the above Scanning probe microscopes (SPMs) excel at nanoscale […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Microscopy Techniques Correct Statements
27. From the following statements: A. Coloured images can be obtained by transmission electron microscopy by fluorescent labelling of the specimen B. Scanning electron microscopy requires sectioning of the sample […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Fluorescence Microscope Best Resolution
26. To achieve the best resolution using a fluorescence microscope, what combination of wavelength of emitted light (λ), refractive index and the angle (2θ) by which light enters into the […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Fluorescence Microscope Live
25. Which one of the following microscopes would you use to visualize a protein fused to an appropriate reporter in a living cell? A. Fluorescence microscope B. Scanning electron microscope […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Microscope Resolution Formula Improvement
24. The most important property of any microscope is its resolution (D) and can be calculated from the formula: D = 0.61λ / (µ sin θ) where D is the minimum distance […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Microorganism Size Calculation
23. A microorganism when viewed under a compound microscope with objective of 10× magnification measured 400 nm in length. The same microorganism when viewed under a dissecting microscope with 10× lens […]
CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY – Video and Text Solutions
Nuclear Protein Fluorescence Microscopy
22. In resting cells, proteins X and Y are localized in the cytosol. Upon stimulation with lipopolysaccharide (LPS), both of them are phosphorylated and translocate to the nucleus. You have […]
