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) […]
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IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
E. coli Generation Time Calculation
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Protozoa Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Diseases and Their Causative Organisms Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Types of Bacterial Flagella Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Viral Capsids Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Bacterial Growth Calculation Using Doubling Time Formula
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Sterilization Methods Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Double-Stranded RNA Virus Explained
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 […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Characteristics of Archaea Explained
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, […]
