MCQOPTIONS
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MCQOPTIONS
This section includes 229 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The phospholipids present in cytoplasm membrane of the archaeo-bacteria is |
| A. | phosphoglycerides |
| B. | polyisoprenoid |
| C. | polyisoprenoid branched chain lipids |
| D. | none of the above |
| Answer» D. none of the above | |
| 202. |
Which of the following actions occur due to low temperature? |
| A. | coagulation of proteins |
| B. | death of microorganisms |
| C. | rate of metabolism is reduced |
| D. | denatures proteins |
| Answer» D. denatures proteins | |
| 203. |
Which of the following are resistant to desiccation? |
| A. | gonococci |
| B. | streptococci |
| C. | meningococci |
| D. | bacillus |
| Answer» C. meningococci | |
| 204. |
Which of the following articles can be sterilized in an autoclave? |
| A. | Gloves |
| B. | Culture media |
| C. | Dressing material |
| D. | All of these |
| Answer» E. | |
| 205. |
Which of the following disinfectants act by disrupting microbial membranes? |
| A. | Cationic detergents |
| B. | Halogens |
| C. | Heavy metals |
| D. | Aldehydes |
| Answer» B. Halogens | |
| 206. |
Plamids are circular DNA molecules capable of autonomous replication. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 207. |
In fluorescence microscopy, which of the following performs the function of removing all light except the blue light? |
| A. | Exciter filter |
| B. | Barrier filter |
| C. | Dichroic mirror |
| D. | Mercury arc lamp |
| Answer» B. Barrier filter | |
| 208. |
Which of the following substances can sterilize? |
| A. | Alcohol |
| B. | Cetylpyridinium chloride |
| C. | Ethylene oxide |
| D. | Chlorine |
| Answer» D. Chlorine | |
| 209. |
Bdellovibrios come under which group of microorganisms? |
| A. | Viruses |
| B. | Bacteria |
| C. | Fungi |
| D. | Algae |
| Answer» C. Fungi | |
| 210. |
All of the following individuals contributed to cell theory except |
| A. | Robert Hooke |
| B. | Matthias Schleiden |
| C. | Theodor Schwann |
| D. | Rudolf Virchow |
| Answer» B. Matthias Schleiden | |
| 211. |
The word cell was first used by |
| A. | Robert Hooke |
| B. | Theodor Schwann |
| C. | Louis Pasteur |
| D. | Ronald Ross |
| Answer» B. Theodor Schwann | |
| 212. |
In Phase contrast microscopy, the rate at which light enters through objects is__________ |
| A. | Constant |
| B. | Inversely proportional to their refractive indices |
| C. | Directly proportional to their refractive indices |
| D. | Exponentially related to their refractive indices |
| Answer» C. Directly proportional to their refractive indices | |
| 213. |
Who discovered the bacteria that cause cholera? |
| A. | Pierre Berthelot |
| B. | Robert Koch |
| C. | Louis Pasteur |
| D. | Rudolf Virchow |
| Answer» C. Louis Pasteur | |
| 214. |
Which among the following kingdoms were proposed by Whittaker? |
| A. | Monera |
| B. | Protista,Fungi |
| C. | Plantae,Animalia |
| D. | Monera,Protista,Fungi,Plantae,Animalia |
| Answer» E. | |
| 215. |
Prokaryotic microorganism include |
| A. | protozoa |
| B. | fungi |
| C. | bacteria |
| D. | all of these |
| Answer» D. all of these | |
| 216. |
Bactericidal concentration of phenol is |
| A. | 0.25% |
| B. | 0.5% |
| C. | 0.75% |
| D. | 1% |
| Answer» E. | |
| 217. |
Lipopolysaccharide in cell walls is characteristic of? |
| A. | Gram-positive bacteria |
| B. | Gram-negative bacteria |
| C. | Fungi |
| D. | Algae |
| Answer» C. Fungi | |
| 218. |
Which microorganism(s) among the following perform photosynthesis by utilizing light? |
| A. | Cyanobacteria |
| B. | Fungi |
| C. | Viruses |
| D. | Cyanobacteria, Fungi and Viruses |
| Answer» B. Fungi | |
| 219. |
Growth of microbes in a solid media is identified by the formation of? |
| A. | pellicle at the top of media |
| B. | colonies |
| C. | sediment at the bottom |
| D. | turbidity |
| Answer» C. sediment at the bottom | |
| 220. |
Which among the following are produced by microorganisms? |
| A. | Fermented dairy products |
| B. | Breads |
| C. | Alcoholic beverages |
| D. | Fermented dairy products, breads and alcoholic beverages |
| Answer» E. | |
| 221. |
For the examination of microbial cells we require the use of? |
| A. | High-power microscope |
| B. | Low-power microscope |
| C. | High-power microscope at a magnification of about 1,000 diameters |
| D. | Low-power microscope at a magnification of about 1,000 diameters |
| Answer» D. Low-power microscope at a magnification of about 1,000 diameters | |
| 222. |
Transfection involves the introduction of plasmid hybrid DNA into the host cell? |
| A. | True |
| B. | False |
| Answer» C. | |
| 223. |
VP3 protein is isolated from which of the following viruses? |
| A. | TMV |
| B. | HIV |
| C. | HRV |
| D. | FMDV |
| Answer» E. | |
| 224. |
Which of the following product is used for the treatment of blood clots? |
| A. | insulin |
| B. | interferon |
| C. | urokinase |
| D. | somatostatin |
| Answer» D. somatostatin | |
| 225. |
Eco R1 cuts the plasmid DNA and the donor DNA such that both the ends are same. |
| A. | True |
| B. | False |
| Answer» C. | |
| 226. |
Which of the following enzymes cut the DNA molecule at particular nucleotide sequence? |
| A. | restriction endonuclease |
| B. | exonuclease |
| C. | ligase |
| D. | polymerase |
| Answer» B. exonuclease | |
| 227. |
Solvents and enzymes are found in which of the following categories of microbial products? |
| A. | Pharmaceutical chemicals |
| B. | Commercially valuable chemicals |
| C. | Food supplements |
| D. | Alcoholic beverages |
| Answer» C. Food supplements | |
| 228. |
Industrial fermentation are performed in large tanks of capacity ______________ |
| A. | 100 gal |
| B. | 1000 gal |
| C. | 50,000 gal |
| D. | 10,000 gal |
| Answer» D. 10,000 gal | |
| 229. |
Which of the following is not a desired characteristic of the organism to be used for industrial application? |
| A. | should produce less amount of product |
| B. | should be readily available |
| C. | should grow rapidly |
| D. | should be nonpathogenic |
| Answer» B. should be readily available | |