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Q76. Under anaerobic fermentative growth conditions, one mole of glucose yields 22 grams of Streptococcus faecalis or 8.6 grams of Zymomonas mobilis. The molar growth yield (YATP) for (i) S. […]

Q75. One mole of a circular bacterial plasmid was digested with a high–fidelityrestriction enzyme. The plasmid has five restriction sites for the enzymeused. The number of moles of fragments released […]

Q74. Which of the following event(s) would contribute to the induction of lacoperon in a wild–type strain of E. coli?(A) Accumulation of allolactose in the cell(B) Direct binding of cAMP […]

Q73. Which of the following method(s) can be applied to identify a bacterialspecies?(A) Fluorescent in situ hybridization (FISH)(B) Polymerase chain reaction (PCR) followed by sequencing of the amplicon(C) Gram staining(D) […]

Q72. Which of the following catalyze(s) substrate–level phosphorylation?(A) ATP synthase(B) Succinate thiokinase(C) Phosphofructokinase(D) Pyruvate kinase Succinate thiokinase and pyruvate kinase catalyze substrate-level phosphorylation. Question Breakdown Substrate-level phosphorylation involves direct transfer […]

Q71. Which of the following is/are used as electron donor/s for CO2 reductionduring photosynthesis in purple sulfur bacteria?(A) Hydrogen sulfide(B) Thiosulfates(C) Methane(D) Sulfates Purple sulfur bacteria use hydrogen sulfide (H₂S) […]

Q70. Protists belonging to the genus Trichonympha thrive in the gut of termites.They help the termites use wood as a food source. This relationship is anexample of(A) parasitism.(B) competition.(C) commensalism.(D) […]

Q69. Nocardia spp. are not amenable to the classical method of Gram stainingdue to the presence of(A) N–acetyltalosaminuronic acid in the cell wall.(B) thick peptidoglycan.(C) mycolic acid.(D) keto–deoxy–octulosonic acid. Nocardia […]

Q68. Water balance in extreme halophiles such as Halobacterium is maintainedby cell surface glycoproteins consisting of(A) glycine and lysine.(B) lysine and histidine.(C) glycine.(D) aspartate and glutamate. Water balance in extreme […]

Q67. Which ONE of the following pathways oxidizes 1 mole of glucose to 2 molesof pyruvic acid along with one mole each of ATP, NADH and NADPH, inPseudomonas spp., but […]