MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 bacteria can grow both as chemolithotrophs or as chemoorganotrophs? |
| A. | Nitrosomonas sp. |
| B. | Pseudomonas pseudoflava |
| C. | Rhodospirillum rubrum |
| D. | Chromatium okenii |
| Answer» C. Rhodospirillum rubrum | |
| 2. |
Which of the following are functions of water in the culture medium? |
| A. | nutrients must be in aqueous solution |
| B. | cofactor of enzymes |
| C. | provides resistance to sudden transient temperature changes |
| D. | it is a chemical reactant, nutrients must also be present in aqueous solution and provide resistance to sudden temperature changes |
| Answer» E. | |
| 3. |
”Red extreme halophiles”, are members of the archaebacterial which cannot grow with less than 12 to 15 percent NaCl. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following is the nutritional characterization of Escherichia coli? |
| A. | Chemotrophic |
| B. | Organotrophic |
| C. | Autotrophic |
| D. | Chemotrophic, Organotrophic, Heterotrophic |
| Answer» E. | |
| 5. |
The organisms which can use reduced inorganic compounds as electron donors are known as _________ |
| A. | chemotrophs |
| B. | organotrophs |
| C. | lithotrophs |
| D. | phototrophs |
| Answer» D. phototrophs | |
| 6. |
WHICH_OF_THE_FOLLOWING_BACTERIA_CAN_GROW_BOTH_AS_CHEMOLITHOTROPHS_OR_AS_CHEMOORGANOTROPHS??$ |
| A. | Nitrosomonas sp. |
| B. | Pseudomonas pseudoflava |
| C. | Rhodospirillum rubrum |
| D. | Chromatium okenii |
| Answer» C. Rhodospirillum rubrum | |
| 7. |
Chromatium okenii uses which of the following compound as electron donor? |
| A. | Hydrogen sulphide |
| B. | Fatty acids |
| C. | Alcohol |
| D. | Succinate |
| Answer» B. Fatty acids | |
| 8. |
Which of the following are functions of water in the culture medium? |
| A. | nutrients must be in aqueous solution |
| B. | cofactor of enzymes |
| C. | provides resistance to sudden transient temperature changes |
| D. | it is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes. |
| Answer» E. | |
| 9. |
”Red extreme halophiles”, are members of the archaebacterial which cannot grow with less than 12 to 15 percent NaCl.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following ions are cofactors for various enzymes? |
| A. | Potassium ion |
| B. | Iron ion |
| C. | Magnesium ion and Iron ion |
| D. | Calcium ion |
| Answer» D. Calcium ion | |
| 11. |
Which of the following are trace elements? |
| A. | Potassium ion |
| B. | Sodium ion |
| C. | Copper ion |
| D. | Magnesium ion |
| Answer» D. Magnesium ion | |
| 12. |
Phosphorus is essential component of __________ |
| A. | teichoic acid |
| B. | nucleotides |
| C. | phospholipids |
| D. | teichoic acid, nucleotides, phospholipids |
| Answer» E. | |
| 13. |
Which of the following amino acids require sulphur for their synthesis? |
| A. | tryptophan |
| B. | methionine |
| C. | cystine |
| D. | methionine and cystine |
| Answer» E. | |
| 14. |
Which of the following is nutritional characterization of Escherichia coli? |
| A. | Chemotrophic |
| B. | Organotrophic |
| C. | Autotrophic |
| D. | Chemotrophic, Organotrophic, Heterotrophic |
| Answer» E. | |
| 15. |
The organisms which can use reduced inorganic compounds as electron donors are known |
| A. | None of these |
| B. | chemotrophs |
| C. | organotrophs |
| Answer» D. | |