MCQOPTIONS
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MCQOPTIONS
This section includes 172 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Enumeration of microorganism refers to |
| A. | either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test |
| B. | either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar |
| C. | non-selective plating, depending on the test |
| D. | none of the above |
| Answer» B. either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar | |
| 152. |
Acid foods with a pH between 4.5 and 3.7 usually are spoiled by |
| A. | B. coagulans |
| B. | Saccharolytic anaerobe |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 153. |
Iron bacteria can produce |
| A. | slime |
| B. | undesirable odors and tastes |
| C. | both (a) and (b) |
| D. | extreme acidity |
| Answer» D. extreme acidity | |
| 154. |
Canned poultry is more often spoiled by |
| A. | putrefactive than by Saccharolytic Clostridia |
| B. | Saccharolytic Clostridia than by putrefactive |
| C. | Saccharomyces species |
| D. | Micrococcus species |
| Answer» B. Saccharolytic Clostridia than by putrefactive | |
| 155. |
Which of the following is responsible for the corrosion problem? |
| A. | Iron bacteria |
| B. | Sulfur bacteria |
| C. | Slime forming bacteria |
| D. | All of these |
| Answer» C. Slime forming bacteria | |
| 156. |
Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results? |
| A. | Ants |
| B. | Bugs |
| C. | Snakes |
| D. | Worms |
| Answer» E. | |
| 157. |
Which of the following microorganism survive at -9 to -17 degree C? |
| A. | Salmonella |
| B. | Staphylococci |
| C. | Bacilli |
| D. | Clostridium |
| Answer» B. Staphylococci | |
| 158. |
The filtering medium of trickling filters is coated with microbial flora, known as |
| A. | zoological film |
| B. | geological film |
| C. | zooglocal film |
| D. | none of these |
| Answer» D. none of these | |
| 159. |
The manufacture of baker's yeast involve |
| A. | S. cerevisiae |
| B. | S. thermophillus |
| C. | Bacillus subtilis |
| D. | none of these |
| Answer» B. S. thermophillus | |
| 160. |
Phosphatase enzyme present in milk is destroyed in which of the following processes? |
| A. | Sterilization |
| B. | Canning |
| C. | Dehydration |
| D. | Pasteurization |
| Answer» E. | |
| 161. |
Oxidation ponds are very deep ponds. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 162. |
Which of the following toxin causing botulism is less toxic to human beings? |
| A. | Type A |
| B. | Type B |
| C. | Type C |
| D. | None of these |
| Answer» C. Type C | |
| 163. |
Abnormal fermentation of cabbage may result in a cheese like odour caused by |
| A. | propionic acid |
| B. | butyric acid |
| C. | caprioc acid and Valeric acid |
| D. | all of these |
| Answer» E. | |
| 164. |
Which of the following (s) is/are the major spoilage of soft drinks from the marked growth of yeasts and bacteria? |
| A. | Cloudiness and ropiness |
| B. | Flat sour spoilage |
| C. | Superficial fungal spoilage |
| D. | Pin-spot molding |
| Answer» B. Flat sour spoilage | |
| 165. |
Shredded cabbage is the starting product for which of the following fermented food? |
| A. | Sauerkraut |
| B. | Pickles |
| C. | Green olives |
| D. | Sausage |
| Answer» B. Pickles | |
| 166. |
Cloudiness of brine of glass-packed olives may be caused by |
| A. | the lactics if fermentation of residual sugar resumes |
| B. | salt-tolerant bacteria |
| C. | film yeasts or moulds if air is available |
| D. | all of the above |
| Answer» E. | |
| 167. |
The staphylococcal intoxication refers to presence of |
| A. | an enterotoxin |
| B. | neurotoxin |
| C. | mycotoxin |
| D. | All of these |
| Answer» B. neurotoxin | |
| 168. |
Which of the following forms of water is the most contaminated? |
| A. | Underground water |
| B. | Rainwater |
| C. | Surface water |
| D. | Water stored in ice caps |
| Answer» D. Water stored in ice caps | |
| 169. |
The potability of water can be checked by sanitary surveys. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 170. |
Alum is used for which of the following purification process? |
| A. | Sedimentation |
| B. | Filtration |
| C. | Disinfection |
| D. | Ozonation |
| Answer» B. Filtration | |
| 171. |
Which of the following organism does not belong to coliform group of bacteria? |
| A. | Salmonella |
| B. | Serratia |
| C. | Enterobacter |
| D. | Proteus |
| Answer» D. Proteus | |
| 172. |
The coliform group of bacteria includes all the __________________ bacilli |
| A. | aerobic |
| B. | anaerobic |
| C. | aerobic,non-sporulating |
| D. | aerobic,Gram-negative,non-sporulating |
| Answer» E. | |