MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Morphallaxis is reported in |
| A. | Porifers |
| B. | Coelentrates and flatworms |
| C. | Nemarteans and some ascidians |
| D. | All the above |
| Answer» B. Coelentrates and flatworms | |
| 2. |
Percentage of nerve cells deteriorated till the age of 70 years is |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 35 |
| Answer» B. 20 | |
| 3. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Birds and mammals show isometric growth. Reason : Fishes and insects show allometric growth. |
| 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 | |
| 4. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion:Nerve supply to a cut part is essential for initiation and completion of regeneration. Reason:Nerve secretes epidermal growth factor and neurotrophic factor for regeneration. |
| 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 | |
| 5. |
Which one of the following is true during ageing [MP PMT 1997] |
| A. | Decrease in blood urea and GFR |
| B. | Increase in calcium content of arteries and cartilage |
| C. | Decrease in cholesterol content of cornea and lens |
| D. | Decrease in calcium content of arteries and cartilage |
| Answer» C. Decrease in cholesterol content of cornea and lens | |
| 6. |
Errors are accumulated due to translation of genetic code affecting the ageing. The theory is |
| A. | Mutation theory |
| B. | Error catastrophe theory |
| C. | Environmental theory |
| D. | Gene theory |
| Answer» C. Environmental theory | |
| 7. |
Ageing is a process programmed by the action of on-off-switches was postulated by |
| A. | Orgel (1963) |
| B. | Holliday (1974) |
| C. | B.L. Strehler |
| D. | Clinker |
| Answer» D. Clinker | |
| 8. |
According to which theory, the resistance of body decreases with the increase in age |
| A. | Immunity theory |
| B. | Collagen theory |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» B. Collagen theory | |
| 9. |
Ageing is the result of |
| A. | Cellular changes |
| B. | Extracellular changes |
| C. | Environmental changes |
| D. | All the above |
| Answer» E. | |