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Q.75 Carl Woese established that short subunit rRNA sequences can be used to revealevolutionary relationships between various organisms. Based on this, which oneof the following options is the established phylogenetic […]

Q.74 The adaptive immune response in an animal involves the generation ofantibodies against an invading bacterial pathogen. The following graphrepresents antibody titer levels in a mammal exposed twice to the […]

Q.73 Which of the following sites is/are the location(s) of ATP generation throughoxidative phosphorylation in Escherichia coli?(A) Inner membrane only(B) Outer membrane only(C) Both outer membrane and inner membrane(D) Mesosome […]

Q.72 The origin of the Escherichia coli chromosome on the genetic map is shownbelow.Bidirectional replication is a feature of this system and both replication forksmove at the same rate. Which […]

Q.71 A bacterium obtains energy from a chemical source by the oxidation of reduced𝑁𝑂2–, with 𝐶𝑂2 as the principal carbon source. Which one of the followingnutritional groups does this bacterium […]

Q.70 A penicillin sensitive Escherichia coli population is exposed to a lethal dose(200 μg/ml) of penicillin. Assuming density–independent mortality, whichone of the following relationships would describe the number of survivingbacteria […]

Q.69 Robert Koch used a meat–infused nutrient medium for which one of thefollowing purposes?(A) To grow disease causing microorganisms.(B) To demonstrate presence of microorganisms in air.(C) To test the efficiency […]

Q.68 Correctly match the bacterial type in Column I with their corresponding environmental niche in Column II. Column I Column II P. Psychrophile i. Pressure greater than 380 atm Q. […]

Q.67 India is aiming to be free of tuberculosis by 2025. One of the key approachesfor this program is DOTS. Which one of the following options is the full formof […]

Q.66 Which one of the following metabolites is associated with bacterial stringentresponse?(A) Cyclic di–GMP (CDG)(B) Guanosine tetraphosphate (ppGpp)(C) Cyclic–AMP (cAMP)(D) Cyclic–GMP (cGMP) The metabolite associated with the bacterial stringent response […]