MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 roles is not a criterion for essentiality of an element? |
| A. | In its absence, plants do not set seeds |
| B. | Irreplaceable by another element |
| C. | Indirectly involved in the metabolism of the plant |
| D. | Absolutely necessary for metabolism |
| Answer» D. Absolutely necessary for metabolism | |
| 2. |
Hydroponics was demonstrated by? |
| A. | Julius Von Sachs |
| B. | Hoagland |
| C. | Arnon |
| D. | M. Calvin |
| Answer» B. Hoagland | |
| 3. |
Nitrogen is not taken up by plants in _______ form. |
| A. | N<sub>2</sub> |
| B. | NO<sub>3</sub><sup> </sup> |
| C. | NO<sub>2</sub><sup> </sup> |
| D. | NH<sub>4</sub><sup>+</sup> |
| Answer» B. NO<sub>3</sub><sup> </sup> | |
| 4. |
Which of the following macronutrients is used in fertilizers? |
| A. | N |
| B. | O |
| C. | P |
| D. | K |
| Answer» E. | |
| 5. |
Which of the following elements is a macronutrient? |
| A. | Cu |
| B. | Mn |
| C. | Cl |
| D. | Mg |
| Answer» E. | |
| 6. |
Which of the following elements is an essential element? |
| A. | Na |
| B. | Co |
| C. | Fe |
| D. | Si |
| Answer» D. Si | |
| 7. |
Which of the following plants is not grown by hydroponics? |
| A. | Tomato |
| B. | Seedless cucumber |
| C. | Lettuce |
| D. | Pumpkin |
| Answer» E. | |
| 8. |
Which of the following elements are required in less than 10 mmole Kg-1? |
| A. | C |
| B. | H |
| C. | S |
| D. | B |
| Answer» E. | |
| 9. |
Hydroponics is carried out in presence of purified water and mineral salts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the element is beneficial but not essential? |
| A. | Ca |
| B. | Mo |
| C. | Na |
| D. | Zn |
| Answer» D. Zn | |