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Q.81 Which of the following combinations would improve the resolution of a microscope?(i) Increasing the half aperture angle of the objective lens(ii) Decreasing the wavelength of the illumination source(iii) Decreasing […]

Q.80 Match the scientists to their area of major contribution Scientists Area of major contribution (i) Antonie van Leeuwenhoek (p) Taxonomy (ii) Carl Linnaeus (q) Antibiotic agents (iii) Louis Pasteur […]

Q.79 Match the precursors/intermediates with the corresponding metabolic pathways. Precursors/Intermediates Metabolic Pathway (i) Inosine monophosphate (p) L-Methionine biosynthesis (ii) Orotate (q) L-Tryptophan biosynthesis (iii) Ornithine (r) L-Arginine biosynthesis (iv) Homocysteine […]

Q.78 Match the microorganisms to their predominant modes of transmission. Microorganism Mode of Transmission (i) Bordetella pertussis (p) Vector-borne (ii) Dengue virus (q) Blood-borne (iii) Entamoeba histolytica (r) Droplet infection […]

Q.77 Match the antimicrobial agents in group I with their category/mode of action in group II Group I Group II (i) Fluoroquinolones (p) β-lactam antibiotic (ii) Tetracycline (q) Inhibition of […]

Q.76 Accumulating evidence suggest that Domain Archaea is more closely related to DomainEukarya than to Domain Bacteria. Which of the following properties are shared betweeneukaryotes and archaea ?(i) Protein biogenesis(ii) […]

Q.75 You have a 50 mg/mL stock solution of arginine. To prepare 1 liter of growth medium foran arginine auxotroph that requires 70 μg/mL of arginine, the volume of this […]

Q.74 In humans, the key stages in the life cycle of malarial parasites occur in(A) red blood cells and the liver(B) red blood cells and platelets(C) red blood cells and […]

Q.73 The primary product of nitrogen fixation is(A) N2 (B) NH4+ (C) NO2– (D) NO3 The primary product of nitrogen fixation is NH₄⁺ (ammonium ion).​ Option Analysis Nitrogen fixation converts […]

Q.72 Which of the following is NOT an accepted method for sterilization?(A) Autoclaving (B) X–rays(C) Gamma rays (D) UV rays UV Rays is not an accepted method for sterilization among […]