Author: admin

53. The decimal reduction time (DRT or D-value) of a bacterial culture is one minute. If a suspension contains an initial population of 10⁶ cells, then the time (in minutes) […]

52. The generation time of E. coli is 20 minutes. If there are 10⁶ E. coli present in an exponentially growing synchronous culture, then the average time (in minutes) required […]

51. Protozoa are: (A) Unicellular (B) Multicellular (C) Eukaryotic (D) Prokaryotic Protozoa: Characteristics, Classification, Cellular Organization, and Biological Importance Introduction Protozoa are among the simplest and most diverse groups of […]

50. Match the diseases in Group I with their causative organisms in Group II. Group I Group II (P) Syphilis (1) Shigella dysenteriae (Q)Bacillary dysentery (2) Bordetella pertussis (R) Gas […]

49. Match the type of bacterial flagella in Group I with their definitions in Group II. Group I Group II (P) Monotrichous (1) Flagella only at both poles of the […]

48. In viruses, capsids are made up of: (A) Proteins (B) Nucleic acids (C) Lipids (D) Sterols Viral Capsids: Structure, Composition, Functions, and Importance in Virology Introduction Viruses are acellular […]

47. Consider that 120 cells of bacteria are inoculated in a nutrient-rich media. If the doubling time of the bacteria is 20 minutes and assuming no cell death, the number […]

46. Which of the following statements is/are true for sterilization? (A) Autoclaving at 121°C for 20 minutes destroys endospores (B) Filtration through 0.22 μm membrane removes viruses from liquid (C)Dry […]

45. Which one of the following animal viruses contains double stranded RNA as genetic material? (A) Influenza virus (B) Rous sarcoma virus (C) Polio virus (D) Reovirus Which Animal Virus […]

44. Which one of the following characteristics is ABSENT in Archaea? (A)Pseudomurein (B)Paracrystalline surface layer (S-layer) (C) Peptidoglycan (D) Circular chromosome Which Characteristic is Absent in Archaea? Pseudomurein, S-Layer, Peptidoglycan, […]