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Q.76 Folic acid synthesis in bacteria is competitively inhibited by sulfonamides. Which of thefollowing essential components is replaced by sulfonamides during the process of folicacid synthesis?(A) Pteridine          […]

Q.75 A bacterial culture contains 500 organisms / mL in the exponential growth phase at 8 am inthe morning. If you consider a generation time of 20 minutes, the total […]

Q.74 What is the enzyme involved in the following reaction?Triglyceride + 3H2O ———–> Glycerol + fatty acids(A) Glycerol phosphate dehydrogenase (B) Glycerol kinase(C) Lipase (D) Zymase Lipase is the enzyme […]

Q.73 Which of the following is a symbiotic bacterial genus that converts nitrogen into nitrogencontaining compounds that are utilized by legume plants to synthesize amino acids?(A) Spirillum (B) Azotobacter(C) Rhizobium […]

Q.72 Dick test is used to assess the susceptibility to______________ .(A) diphtheria (B) scarlet fever (C) typhoid fever (D) tuberculosis The Dick test assesses susceptibility to scarlet fever. This skin test, […]

Q.71 Secondary metabolites such as penicillin from mold are produced during the _______ .(A) lag phase (B) idiophase (C) log phase (D) decline phase The correct answer is (B) idiophase.​ […]

Q.70 The highly contagious viral disease measles is caused by a(A) double–stranded DNA virus(B) single–stranded DNA virus(C) single–stranded RNA virus(D) double–stranded RNA virus Measles is caused by a single-stranded RNA […]

Q.69 Microbes make up about ___________ of earth’s living material by weight.(A) 1/4th (B) 2/3rd (C) 3/4th (D) 4/5th The correct answer is (B) 2/3rd. Scientific data shows microbes constitute […]

Q.68 Which part of the lipopolysaccharides has toxic properties that make some bacterialinfections a potentially serious medical problem?(A) Polysaccharide side–chains    (B) Lipid A portion(C) Repeat carbohydrate units      […]

Q.67 Which of the following radiation methods is used in preserving food from spoilage bymicroorganisms?(A) Radio waves (B) Microwaves (C) Non–ionizing (D) Ionizing Ionizing radiation effectively preserves food by destroying […]