MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not a method of controlling bacterial diseases in plants? |
| A. | Roguing of infected plants |
| B. | Sanitation methods |
| C. | Quarantine |
| D. | Virus-free seeds |
| Answer» E. | |
| 2. |
Which of the following is not a symptom of bacterial diseases in plants? |
| A. | Blight |
| B. | Mosaic |
| C. | Wilts |
| D. | Rots |
| Answer» C. Wilts | |
| 3. |
Bacteria spread from infected plants to healthy plants only by air currents. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which of the following is not a bacterial plant pathogen? |
| A. | <em>Pseudomonas</em> |
| B. | <em>Clostridium</em> |
| C. | <em>Puccinia</em> |
| D. | <em>Xanthomonas</em> |
| Answer» C. <em>Puccinia</em> | |
| 5. |
Which of the following is not a method of overcoming the infection of Bean mosaic disease? |
| A. | Virus-free seeds |
| B. | Cutting leaves |
| C. | Delayed planting |
| D. | Sowing resistant varieties |
| Answer» C. Delayed planting | |
| 6. |
Which of the following is not a symptom of Bean Mosaic disease? |
| A. | Plants are bunchy |
| B. | Leaves show mottling |
| C. | Mosaic appearance on leaves |
| D. | Blackening of leaflets |
| Answer» E. | |
| 7. |
Which of the following organism causes Bean Mosaic Disease in plants? |
| A. | Virus |
| B. | Bacteria |
| C. | Fungi |
| D. | Nematode |
| Answer» B. Bacteria | |
| 8. |
Which of the following is not a common measure of controlling viral infections? |
| A. | Using healthy virus-free seeds |
| B. | Antibiotics |
| C. | Using resistant varieties |
| D. | Protection from insect vectors |
| Answer» C. Using resistant varieties | |
| 9. |
Common symptoms of viral infection in plants are local lesions and ring spots. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following is not a method by which a virus enters a healthy host? |
| A. | By vectors |
| B. | Meristem |
| C. | Infected fungal spores |
| D. | Through wounds |
| Answer» C. Infected fungal spores | |
| 11. |
Which of the following is not a method by which viral infection spreads in plants? |
| A. | Exuding sap of infected plants |
| B. | Infected seeds |
| C. | Through meristem |
| D. | Infected pollen |
| Answer» D. Infected pollen | |
| 12. |
Which of the following group of viruses generally attack plants? |
| A. | Retroviruses |
| B. | Riboviruses |
| C. | Rheoviruses |
| D. | Enteroviruses |
| Answer» C. Rheoviruses | |