McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Agriculture (BSc agri) .
Chapters
| 51. |
The bacterial culture prepared by pure culture is |
| A. | Inoculum |
| B. | Suspension |
| C. | Dilution |
| D. | None of these |
| Answer» A. Inoculum | |
| 52. |
Separation of a single colony is |
| A. | Pure-culturing |
| B. | Isolation |
| C. | Separation |
| D. | Both a and b |
| Answer» B. Isolation | |
| 53. |
Growth period of the culture is |
| A. | Inoculation |
| B. | Incubation |
| C. | Incineration |
| D. | Isolation |
| Answer» B. Incubation | |
| 54. |
At the temperature 160oC for one hour, complete sterilization occurs in |
| A. | Autoclave |
| B. | Hot air oven |
| C. | Laminar flow |
| D. | Incubator |
| Answer» B. Hot air oven | |
| 55. |
In autoclave, the principle involved is |
| A. | Dry heat |
| B. | Moist heat |
| C. | Steam under pressur |
| D. | Both b and c |
| Answer» D. Both b and c | |
| 56. |
The spores of th bacteria which can withstand the moist heat effect also |
| A. | Bacillus subtilis |
| B. | Coxiella burnetti |
| C. | Bacillus stearothermophilus |
| D. | Pseudomonas |
| Answer» C. Bacillus stearothermophilus | |
| 57. |
Factors on which disinfectivity of a disinfectant depends |
| A. | Concentration of the substance |
| B. | Time of action |
| C. | pH of the medium and temperature suitable for the chemical |
| D. | All of the above |
| Answer» D. All of the above | |
| 58. |
Aldehydes, which are most powerful disinfectants |
| A. | Formaldehyde |
| B. | Acetaldehyde |
| C. | Glutamal aldehyde |
| D. | Both a and c |
| Answer» D. Both a and c | |
| 59. |
Accridine dyes are more effective against |
| A. | Gram positive |
| B. | Gram negative |
| C. | Mycoplasmas |
| D. | Rickttsiae |
| Answer» A. Gram positive | |
| 60. |
The sterilizing agent is |
| A. | Ethelene oxide |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Carbon tetrachloride |
| Answer» A. Ethelene oxide | |
| 61. |
Salts of heavy metals used as disinfectants are |
| A. | Thiomersal |
| B. | Phenyl mercury nitrate |
| C. | Mercurochrome |
| D. | All of these |
| Answer» D. All of these | |
| 62. |
Cultures are prepared by penetrating the inoculation loop with suspension into the medium, they are |
| A. | Stock culture |
| B. | Stabcultures |
| C. | Sub-cultures |
| D. | None of these |
| Answer» B. Stabcultures | |
| 63. |
The principle involved in the streak plate method is |
| A. | Separation |
| B. | Streaking |
| C. | Isolation |
| D. | Dilution |
| Answer» D. Dilution | |
| 64. |
Culture media for fungi are |
| A. | Potato dextrose agar (PDA) |
| B. | Sabouraud’s agar |
| C. | Czapekdox agar |
| D. | All of the above |
| Answer» D. All of the above | |
| 65. |
Spores of actinomycetes are very sensitive, killed at room temperature of |
| A. | 52oC for 30 min. |
| B. | 65oC for 30 min. |
| C. | 70oC for 30 min. |
| D. | 43oC for 30 min. |
| Answer» B. 65oC for 30 min. | |
| 66. |
The term that is used for the bacteria which can withstand pasteurization but does not grow at higher temperatures |
| A. | Thermophiles |
| B. | Extreme thermophiles |
| C. | Thermoduric |
| D. | Facultative thermophiles |
| Answer» C. Thermoduric | |
| 67. |
A common laboratory method of cultivating anaerobic micro-organisms is |
| A. | Gas pack system |
| B. | Brewer jar system |
| C. | Pyrogallic acid over the cotton |
| D. | None of these |
| Answer» C. Pyrogallic acid over the cotton | |
| 68. |
Alkaliphiles grow at pH value between |
| A. | 1 to 6 |
| B. | 6 to 9 |
| C. | 1 to 11 |
| D. | 7 to 12 |
| Answer» D. 7 to 12 | |
| 69. |
The micro-organisms grow at high salinity are |
| A. | Osmophile |
| B. | Halophiles |
| C. | Both a and b |
| D. | None of these |
| Answer» C. Both a and b | |
| 70. |
Non-lactose fermenting colonies seen on Mac Conkey’s medium are |
| A. | Salmonella typhi |
| B. | Escherichia coli |
| C. | Klebsiella pneumoniae |
| D. | Shigella shigae |
| Answer» A. Salmonella typhi | |
| 71. |
Wilson and Blair medium is used for isolation of |
| A. | Staphylococci |
| B. | Salmonella typhosa |
| C. | Vibrio cholerae |
| D. | Shigella shigae |
| Answer» B. Salmonella typhosa | |
| 72. |
Laboratory diagnosis of enteric fever is based on |
| A. | Blood culture |
| B. | Urine and stool culture |
| C. | Widal test |
| D. | All of the above |
| Answer» D. All of the above | |
| 73. |
Shigella was first isolated by |
| A. | Shiga |
| B. | Schmitz |
| C. | Sonnei |
| D. | Robert Koch |
| Answer» C. Sonnei | |
| 74. |
Which of the following are gas producing Salmonella? |
| A. | S.typhi |
| B. | S.enteritidis |
| C. | S.cholerasuis |
| D. | S.typhimurium |
| Answer» B. S.enteritidis | |
| 75. |
Kauffmann white scheme is used to detect |
| A. | Salmonella spp. |
| B. | Shigella spp. |
| C. | E.coli |
| D. | None of these |
| Answer» A. Salmonella spp. | |
| 76. |
On Mac Conkey’s medium Esch. Coli forms |
| A. | Colorless colonies |
| B. | Greenish pigmentation |
| C. | Pink coloured colonies |
| D. | Medusa head appearance |
| Answer» C. Pink coloured colonies | |
| 77. |
C.diphtheriae requires |
| A. | LJ medium |
| B. | Mac Conkey’s medium |
| C. | Potassium tellurite medium |
| D. | PDA medium |
| Answer» C. Potassium tellurite medium | |
| 78. |
Culture medium for Mycobacterium tuberculosis |
| A. | LJ medium |
| B. | Mac Conkey’s medium |
| C. | Wilson blair medium |
| D. | None of these |
| Answer» A. LJ medium | |
| 79. |
Lepra bacillus is best cultured on |
| A. | Armadillo’s brain |
| B. | Foot pad of mice |
| C. | Liver of guinea pig |
| D. | Any of the above |
| Answer» B. Foot pad of mice | |
| 80. |
Culture medium for clostridia spp. |
| A. | 76 Lower stein Jensen’s medium |
| B. | Mac Conkey’s medium |
| C. | Robertson’s cooked meat medium |
| D. | None of these |
| Answer» C. Robertson’s cooked meat medium | |
| 81. |
Clsotridium welchii is positive for |
| A. | Elek’s gel precipitation test |
| B. | Nagler’s test |
| C. | Weil felix test |
| D. | Bacitracin test |
| Answer» B. Nagler’s test | |
| 82. |
Nagler’s reaction detects |
| A. | Coagulase |
| B. | Hyaluronidase |
| C. | Lecithinase |
| D. | None of these |
| Answer» C. Lecithinase | |
| 83. |
Incubation period of Cl. welchii is |
| A. | 8-12 hour |
| B. | 7-10 hours |
| C. | 5-7 hours |
| D. | 2-4 hours |
| Answer» A. 8-12 hour | |
| 84. |
The average incubation period of tetanus is |
| A. | 2-3 day |
| B. | 7-10 days |
| C. | 14-21 days |
| D. | 3-4 weeks |
| Answer» B. 7-10 days | |
| 85. |
Salt agar is used for |
| A. | Streptococcu |
| B. | Staphylococcus |
| C. | Vibrio |
| D. | Shigella |
| Answer» B. Staphylococcus | |
| 86. |
Culture medium of Leishmania is |
| A. | Sabousand’s medium |
| B. | NNN medium |
| C. | Wilson Blair medium |
| D. | Czapek – dox medium |
| Answer» B. NNN medium | |
| 87. |
A simple asexual spore which develops by budding is known as |
| A. | Chlamydospore |
| B. | Blastospore |
| C. | Arthospore |
| D. | Conidia |
| Answer» B. Blastospore | |
| 88. |
Culture medium used for fungus is |
| A. | Sabouraud’s medium |
| B. | Nutrient agar |
| C. | Nutrient broth |
| D. | Minimal agar medium |
| Answer» A. Sabouraud’s medium | |
| 89. |
For ster i l izat ion of fermentat ion equipment the method followed is |
| A. | Radiation |
| B. | Chemicals |
| C. | Heating |
| D. | All of these |
| Answer» D. All of these | |
| 90. |
The size of the virus can be determined by |
| A. | Micrography |
| B. | Ultra-centrifugation at high speed |
| C. | Ultra-filteration |
| D. | All of these |
| Answer» D. All of these | |
| 91. |
Differential staining of bacteria spore is related to |
| A. | Albert’s staining |
| B. | Lugol’ s staining |
| C. | Moller’s staining |
| D. | Indian ink preparation |
| Answer» C. Moller’s staining | |
| 92. |
Wilson and Blair bismuth sulphite medium is used for the growth |
| A. | Salmonella typhi |
| B. | Shigella dysenteriae |
| C. | Vibrio cholerae |
| D. | E. coli |
| Answer» A. Salmonella typhi | |
| 93. |
Which Rickettsia can be grown on blood agar media? |
| A. | Lactobacilli |
| B. | Streptobacillus |
| C. | Bacillus anthrax |
| D. | Vibrio cholerae |
| Answer» A. Lactobacilli | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.