23. A population of bacterial cells grows from 10,000 to 100,000,000 cells in 6 hours. The generation time of the bacterial population is __________ min. (rounded off to 2 decimals) […]
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IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Deinococcus radiodurans Explained
22. Which of the following statement(s) is/are CORRECT about Deinococcus radiodurans? (A) It has a cell wall consisting of several layers, including an outer membrane that lacks lipid A (B) […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Mechanism of Action of Polymyxins
21. Mechanism of antibacterial action of polymyxins relies on the (A) inhibition of 30S ribosomal subunit (B) disruption of peptidoglycan synthesis (C) inhibition of DNA replication of bacteria (D) disruption […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Peptidoglycan Biosynthesis Enzymes Explained
20. The final stage of peptidoglycan (PG) biosynthesis is marked by PG cross-link formation and remodeling. Which of the following enzymes does NOT take part in these processes? (A) Transglycosidases […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
HIV-1 Reverse Transcriptase Functions Explained
19. Which of the following activities is NOT possessed by the human immunodeficiency virus-1 reverse transcriptase? (A) Synthesis of DNA from RNA (B) Synthesis of DNA from DNA (C) Degradation […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Bacterial Cell Suspension Volume Calculation
18. A bacterial cell suspension contains 2×10⁵ cells mL⁻¹. The volume of this suspension required to obtain 1.4×10⁶ cells is __________ mL (rounded off to the nearest integer). Bacterial Cell […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Retrovirus Characteristics Explained
17. Which of the following is/are true about Retrovirus? (A) It contains double-stranded RNA genome (B) It can cause cancer (C) It contains reverse transcriptase (D) It contains double-stranded DNA […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Bacterial Morphology Explained
16. Match the morphology in Group I with the corresponding microorganism in Group II Group I Group II P. Coccus 1. Treponema Q. Rod 2. Bacillus R. Comma 3. Neisseria […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
Bacterial Growth Calculation Formula
15. If a bacterial culture with a doubling time of 30 minutes starts with two cells, then the number of cells after 4 hours are ______. Bacterial Growth Calculation: Number […]
IIT JAM Biotechnology Previous Year Question paper Topic Microbiology
RNA-Dependent RNA Polymerase in Negative-Sense RNA Viruses
14. Which one of the following enzymes is required to ensure the replication of a negative-sense or negative-strand RNA virus? (A) DNA-dependent RNA polymerase (B) DNA polymerase (C) RNA-dependent DNA […]
