MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is symbiotic nitrogen fixing bacteria? |
| A. | Rhizobium trifolii |
| B. | Clostridium pasteurianum |
| C. | Azotobacter sp. |
| D. | Escherichia coli |
| Answer» B. Clostridium pasteurianum | |
| 2. |
How much time does nitrifying bacteria require to grow at an incubation of 250 to 300 C? |
| A. | 1 day |
| B. | 2-3 days |
| C. | 15 days |
| D. | 1 to 4 months |
| Answer» E. | |
| 3. |
Ammonia oxidizers and nitrite oxidizers are ______________ |
| A. | Gram-negative chemolithotrophs |
| B. | Gram-positive chemolithotrophs |
| C. | Gram-negative photolithotrophs |
| D. | Gram-positive photolithotrophs |
| Answer» B. Gram-positive chemolithotrophs | |
| 4. |
WHICH_OF_THE_FOLLOWING_IS_A_SYMBIOTIC_NITROGEN_FIXING_BACTERIA??$ |
| A. | Rhizobium trifolii |
| B. | Clostridium pasteurianum |
| C. | Azotobacter sp. |
| D. | Escherichia coli |
| Answer» B. Clostridium pasteurianum | |
| 5. |
Which of the following are not the features of component II of nitrogenase enzyme complex? |
| A. | component II is nitrogenase reductase |
| B. | component II is known as the MoFe protein |
| C. | contains sulfur |
| D. | not active without component I |
| Answer» C. contains sulfur | |
| 6. |
Which of the following conditions decreases the level of denitrification? |
| A. | Abundance of organic matter |
| B. | Acidic pH |
| C. | Elevated temperatures |
| D. | Availability of oxygen |
| Answer» C. Elevated temperatures | |
| 7. |
Agrobacterium is involved in which of the following processes? |
| A. | Ammonification |
| B. | Nitrification |
| C. | Reduction of nitrate to ammonia |
| D. | Denitrification |
| Answer» E. | |
| 8. |
Which among the following is not an ammonia-oxidizing bacteria? |
| A. | Nitrosomonas europaea |
| B. | Nitrosovibrio tenuis |
| C. | Nitrospina gracilis |
| D. | Nitrosococcus oceanus |
| Answer» D. Nitrosococcus oceanus | |
| 9. |
Nitrosococcus nitrosus is a nitrite-oxidizing bacteria. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
How much time does nitrifying bacteria requires to grow at an incubation of 250 to 300 C? |
| A. | 1 day |
| B. | 2-3 days |
| C. | 15 days |
| D. | 1 to 4 months |
| Answer» E. | |
| 11. |
Alanine gives pyruvic acid on deamination. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Ammonia oxidizers and nitrite oxidizers are ________________________ |
| A. | Gram-negative chemolithotrophs |
| B. | Gram-positive chemolithotrophs |
| C. | Gram-negative photolithotrophs |
| D. | Gram-positive photolithotrophs |
| Answer» B. Gram-positive chemolithotrophs | |