MCQOPTIONS
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MCQOPTIONS
This section includes 31 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following plays the major role in providing support to young herbaceous parts of the plant: |
| A. | Living cells of epidermis with higher turgor pressure. |
| B. | Living cells of cortex and pith with higher turgor pressure. |
| C. | Collenchyma cells |
| D. | All of these |
| Answer» E. | |
| 2. |
Higher turgor pressure in a plant cell is maintained by: |
| A. | Large number of vacoules in a plant cell. |
| B. | Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane |
| C. | Higher osmotic pressure of the cell vacuole |
| D. | Both b and c |
| Answer» E. | |
| 3. |
Secondary cell wall of sclerenchyma cells is impregnated with |
| A. | Cellulose. |
| B. | Peptidoglycan and murein. |
| C. | Lignin. |
| D. | Pectin. |
| Answer» D. Pectin. | |
| 4. |
An increrase in plant girth due to activity of _____ is called secondary growth. |
| A. | Cork cambium |
| B. | Pith. |
| C. | Vascular cambium. |
| D. | Both a and c |
| Answer» E. | |
| 5. |
The contraction of which of the following muscle fibers, is controlled by hormones: |
| A. | A smooth muscle |
| B. | A cardiac muscle |
| C. | A skeletal muscle. |
| D. | All of these |
| Answer» B. A cardiac muscle | |
| 6. |
Diameter of thick filament is: |
| A. | 7 nm. |
| B. | 8 nm |
| C. | 16nm |
| D. | 10-100 ?m. |
| Answer» D. 10-100 ?m. | |
| 7. |
The most important function of troponin is |
| A. | To bind with actin |
| B. | To bind with tropomyosin. |
| C. | To bind with Ca2+ ions. |
| D. | All of these |
| Answer» E. | |
| 8. |
Rigor mortis i.e, stiffening of body after death results from: |
| A. | Accunulation of rigid proteins molecules in sarcoplam. |
| B. | Unavailability of ATP, which is necessary to break the link between actin and myosin. |
| C. | Decrease in body temperature after death. |
| D. | Death of tissue due to unavailability of O2. |
| Answer» C. Decrease in body temperature after death. | |
| 9. |
Tetany is caused by |
| A. | Hypocalcemia |
| B. | Hypercalcemia |
| C. | Clostridum tetani. |
| D. | Low O2 level |
| Answer» B. Hypercalcemia | |
| 10. |
Insertion of Biceps is on |
| A. | Ulna |
| B. | Radius |
| C. | Olecronon process of ulna. |
| D. | Scapula |
| Answer» C. Olecronon process of ulna. | |
| 11. |
Vascular Cambium initially appears as actively dividing cells between: |
| A. | Primary Xylem and secondary xylem. |
| B. | Primary xylem and secondary phloem. |
| C. | Primary xylem and primary phloem |
| D. | Secondary xylem and secondary phloem. |
| Answer» D. Secondary xylem and secondary phloem. | |
| 12. |
Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of: |
| A. | Chemotropic movement |
| B. | Chemotactic movement. |
| C. | Chemosastic movement |
| D. | Haptonastic movement. |
| Answer» C. Chemosastic movement | |
| 13. |
S-band locomotion is characteristically seen in: |
| A. | Bony fish |
| B. | Cartilaginous fish. |
| C. | Fish like mammals. |
| D. | All fishes. |
| Answer» C. Fish like mammals. | |
| 14. |
A joint formed between humerus, radius and ulna is an example of |
| A. | Immovable joint. |
| B. | Slightly movable joint. |
| C. | Freely movable joint. |
| D. | Fibrous joint |
| Answer» D. Fibrous joint | |
| 15. |
Joint between two parietal bones, which is infact immovable one is an example of |
| A. | Fibrous joints. |
| B. | Cartilaginous joints. |
| C. | Synovial joints. |
| D. | None of these |
| Answer» B. Cartilaginous joints. | |
| 16. |
Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency: |
| A. | Hypocalcaemia Tatanic spasms. |
| B. | Osteomalacis. |
| C. | Rickets. |
| D. | Tetany |
| Answer» D. Tetany | |
| 17. |
If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called |
| A. | Open reduction. |
| B. | Closed Fixation. |
| C. | Open fixation. |
| D. | Immobilization |
| Answer» B. Closed Fixation. | |
| 18. |
A fracture hematoma has |
| A. | Healing properties. |
| B. | Destructive properties. |
| C. | Neutralizing properties. |
| D. | Dead cells |
| Answer» E. | |
| 19. |
Bony callus formation completes in: |
| A. | 2-3 weeks |
| B. | 3-4 weeks. |
| C. | 2-3 months. |
| D. | 3-4 months. |
| Answer» D. 3-4 months. | |
| 20. |
Exoskeleton of a marine snail is composed of |
| A. | CaPO4 |
| B. | CaCO3 |
| C. | CaSO4 |
| D. | SiO2 |
| Answer» C. CaSO4 | |
| 21. |
Ecdysone is |
| A. | An enzyme that digest endocuticle during an arthropodal ecdysis. |
| B. | A newly formed exoskeleton in authropods |
| C. | A hormone that regulates moulting in arthropods. |
| D. | A process that involves moulting. |
| Answer» D. A process that involves moulting. | |
| 22. |
Endoskeleton is secreted by: |
| A. | Ectoderm. |
| B. | Endoderm. |
| C. | Mesoderm. |
| D. | All of these |
| Answer» D. All of these | |
| 23. |
Collagen fibers of bone are hardened by deposition of: |
| A. | Ca & PO4 |
| B. | CaCO3 |
| C. | CaSO4 |
| D. | SiO2 |
| Answer» B. CaCO3 | |
| 24. |
How many vertebrae are present in the neck or cervical region of man? |
| A. | 7 |
| B. | 12 |
| C. | 5 |
| D. | 4 |
| Answer» B. 12 | |
| 25. |
The place of attachment of leaf with the shoot is called: |
| A. | Pith. |
| B. | Pit. |
| C. | Pulvinus. |
| D. | Ecdysone. |
| Answer» D. Ecdysone. | |
| 26. |
Rapid movement of leaves of mimosa on touching is an example of : |
| A. | Turgor movement |
| B. | Nastic movement |
| C. | Tropic movements. |
| D. | Growth movement |
| Answer» B. Nastic movement | |
| 27. |
Roots of a plant show |
| A. | Positive phototropism and negative geotropism. |
| B. | Negative phototropism and positive geotropism. |
| C. | Negative tactic movement and positive tropic movement. |
| D. | Positive geotropism of stem and roots |
| Answer» C. Negative tactic movement and positive tropic movement. | |
| 28. |
Epinasty is controlled by |
| A. | Gibberellins |
| B. | Abscisins |
| C. | Auxins |
| D. | Cytokinins |
| Answer» D. Cytokinins | |
| 29. |
Gibberellins is an example of |
| A. | Growth inhibitor |
| B. | Growth stimulator |
| C. | Growth hormone |
| D. | None of these |
| Answer» C. Growth hormone | |
| 30. |
Which of the following animal has a hydrostatic skeleton: |
| A. | Earthworm. |
| B. | Round worm. |
| C. | Tape worm. |
| D. | Pin worm |
| Answer» B. Round worm. | |
| 31. |
In an annelids, the contraction of circular muscle results in: |
| A. | Lengthening of the body. |
| B. | Shortening of the body. |
| C. | Widening of body |
| D. | Thinning of body |
| Answer» E. | |