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. |
The number of essential elements required for normal growth of plant is [BHU 2003] |
| A. | 10 |
| B. | 16 |
| C. | 20 |
| D. | 25 |
| Answer» C. 20 | |
| 2. |
Who gave the criteria of essentiality |
| A. | R. Hill |
| B. | F.F. Blackman |
| C. | M.P. Kaushik |
| D. | D.L. Arnon |
| Answer» E. | |
| 3. |
Which of the following is not caused by deficiency of mineral nutrition [CBSE PMT 1997] |
| A. | Necrosis |
| B. | Chlorosis |
| C. | Etiolation |
| D. | Shortening internode |
| Answer» D. Shortening internode | |
| 4. |
If a plant material is dried and burnt in a crucible, the residue would contain |
| A. | Oxides and carbonates of about ten elements |
| B. | Carbon and phosphorus |
| C. | Nitrates and sulphates only |
| D. | Oxides and carbonates of Ca and Mg only |
| Answer» B. Carbon and phosphorus | |
| 5. |
Calcium works as catalyst for |
| A. | ATPase |
| B. | Phospholipids |
| C. | Succinic dehydrogenase |
| D. | All the above |
| Answer» E. | |
| 6. |
Which of the following deficiency may cause leaf tip bending [BVP 2003] |
| A. | Sulphur |
| B. | Nitrogen |
| C. | Phosphorus |
| D. | Calcium |
| Answer» B. Nitrogen | |
| 7. |
Which of the following shows that metabolic energy is required in the absorption of ions[MP PMT 1992] |
| A. | More ions absorption in presence of oxygen |
| B. | Less absorption of ions in presence of oxygen |
| C. | More ions absorption in presence of ATP |
| D. | More ions absorption in presence of NAD |
| Answer» D. More ions absorption in presence of NAD | |
| 8. |
Assertion : The leaves of cauliflower become flaccid and brown in molybdenum deficiency. Reason : Cauliflower plant is affected by whiptail disease in molybdenum deficiency. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 9. |
Assertion : Calcium is a constituent of cell wall. Reason : Calcium is required in mitotic division. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» C. If the assertion is true but the reason is false | |
| 10. |
Assertion : Nitrogen-fixing bacteria in legume root nodules survive in oxygen-depleted cells of nodules. Reason : Leghaemoglobin completely removes oxygen from the nodule cells. [AIIMS 2004] |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» E. If the assertion is false but reason is true | |