Questions
49. Magnetite-bearing magnetosomes have also been found in eukaryotic magnetotactic _________
- [A] algae
- [B] fungi
- [C] bacteria
- [D] protozoan
Answer: Option [A]
50. The role of pili in cloning of bacteria in E.coli is ________.
- [A] conjugation
- [B] transformation
- [C] tranfection
- [D] transduction
Answer: Option [A]
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51. Various commercial products of economic value made by microbes are ______
- [A] medicines
- [B] organic acids
- [C] amino acids
- [D] all the above
Answer: Option [D]
52. Many individuals of the same species living together in a defined area form a/an ________.
- [A] community
- [B] genus
- [C] population
- [D] ecosystem
Answer: Option [A]
53. While using any pair of carbon compounds as long as other nutrients are not limiting, the bacteria shows ______ growth.
- [A] diauxic
- [B] continuous
- [C] batch
- [D] synchronous
Answer: Option [A]
54. Contagious disease spreads by ________.
- [A] inhalation
- [B] ingestion
- [C] inculation
- [D] contact
Answer: Option [D]
55. The widely used fumigant is ________.
- [A] ethylene
- [B] chlorine
- [C] formaldehyde
- [D] CO2
Answer: Option [C]
56. Somatic cells undergo ________
- [A] mitosis
- [B] meiosis
- [C] mitosis and meiosis
- [D] neither mitosis nor meiosis
Answer: Option [A]
57. Gametic cells undergo ________
- [A] mitosis
- [B] meiosis
- [C] binary fission
- [D] neither mitosis and meiosis
Answer: Option [B]
58. Separation of small molecule can be done by ________.
- [A] viscometer
- [B] centrifugation
- [C] flow cytometry
- [D] spectrophotometer
Answer: Option [B]
59. A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is ________.
- [A] capsule
- [B] cell wall
- [C] flagellum
- [D] peptidoglycan
Answer: Option [A]
60. Which year Beijerinck found the free living nitrogen fixing bacteria Azotobacter __________.
- [A] 1909
- [B] 1919
- [C] 1921
- [D] 1901
Answer: Option [D]
