Q.86 Trees in the equatorial region of earth supply oxygen into the atmosphere that sustains speciesliving in distant polar regions. This relationship is called as(A) mutualism (B) symbiosis(C) commensalism (D) parasitism […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
GATE Life Science 2012 Previous Year Papers with Solutions
Cattle Eructation Fermentation
Q.85 Methane belched (eructation) out by cattle arises from the carbon dioxide produced(A) during normal respiration(B) oxidation of food stuff occurring in mitochondria(C) lactic acid fermentation occurring in muscles(D) bacterial fermentation […]
GATE Life Science 2012 Previous Year Papers with Solutions
Cyanobacterial Heterocysts Transformation
Q.84 Transformation of normal cyanobacterial cells into heterocysts involves(A) synthesis of nitrogenase and retention of photosystem I(B) synthesis of nitrogenase and loss of photosystem I(C) loss of nitrogenase but retention of […]
GATE Life Science 2012 Previous Year Papers with Solutions
Nalidixic Acid Resistance Gyrase Mutation
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 […]
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 […]
