MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Biotechnology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A() __________ is an excised piece of leaf or stem tissue used in micropropagation. |
| A. | microshoot |
| B. | medium |
| C. | explant |
| D. | scion |
| Answer» D. scion | |
| 2. |
Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with |
| A. | cellulotyic enzymes |
| B. | pectolytic enzymes |
| C. | both cellulotyic and pectolytic enzymes |
| D. | proteolytic enzymes |
| Answer» D. proteolytic enzymes | |
| 3. |
Subculturing is similar to propagation by cuttings because |
| A. | it separates multiple microshoots and places them in a medium |
| B. | it uses scions to produce new microshoots |
| C. | they both use in vitro growing conditions |
| D. | all of the above |
| Answer» B. it uses scions to produce new microshoots | |
| 4. |
Organogenesis is |
| A. | formation of callus tissue |
| B. | formation of root and shoots on callus tissue |
| C. | both (a) and (b) |
| D. | genesis of organs |
| Answer» C. both (a) and (b) | |
| 5. |
Which of the following is used in the culture of regenerating protoplasts, single cells or very dilute cell suspensions? |
| A. | Nurse medium |
| B. | Nurse or feeder culture |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 6. |
Agrobacterium based gene transfer is efficient |
| A. | only with dicots |
| B. | only with monocots |
| C. | with both monocots and dicots |
| D. | with majority monocots and few dicots |
| Answer» B. only with monocots | |
| 7. |
The ability of the component cells of callus to form a whole plant is known as |
| A. | redifferentiation |
| B. | dedifferentiation |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» B. dedifferentiation | |
| 8. |
What is/are the benefit(s) of micropropagation or clonal propagation? |
| A. | Rapid multiplication of superior clones |
| B. | Multiplication of disease free plants |
| C. | Multiplication of sexually derived sterile hybrids |
| D. | All of the above |
| Answer» E. | |
| 9. |
Cell fusion method includes the preparation of large number of |
| A. | plant cells stripped of their cell wall |
| B. | single plant cell stripped of their cell wall |
| C. | plant cells with cell wall |
| D. | cells from different species |
| Answer» C. plant cells with cell wall | |
| 10. |
Which breeding method uses a chemical to strip the cell wall of plant cells of two sexually incompatible species? |
| A. | Mass selection |
| B. | Protoplast fusion |
| C. | Transformation |
| D. | Transpiration |
| Answer» C. Transformation | |
| 11. |
Which of the following is considered as the disadvantage of conventional plant tissue culture for clonal propagation? |
| A. | Multiplication of sexually derived sterile hybrids |
| B. | Less multiplication of disease free plants |
| C. | Storage and transportation of propogates |
| D. | Both (b) and (c) |
| Answer» D. Both (b) and (c) | |
| 12. |
Which method of plant propagation involves the use of girdling? |
| A. | Grafting |
| B. | Cuttings |
| C. | Layering |
| D. | Micropropagation |
| Answer» D. Micropropagation | |
| 13. |
A(n) __________ is an excised piece of leaf or stem tissue used in micropropagation. |
| A. | microshoot |
| B. | medium |
| C. | explant |
| D. | scion |
| Answer» D. scion | |
| 14. |
The phenomenon of the reversion of mature cells to the meristematic state leading to the formation of callus is known as |
| A. | redifferentiation |
| B. | dedifferentiation |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» C. either (a) or (b) | |
| 15. |
When plated only in nutrient medium, how much time is required for the protoplast to synthesize new cell wall? |
| A. | 2-5 days |
| B. | 5-10 days |
| C. | 10-15 days |
| D. | 15-17 days |
| Answer» C. 10-15 days | |
| 16. |
What is meant by 'Organ culture' ? |
| A. | Maintenance alive of a whole organ, after removal from the organism by partial immersion in a nutrient fluid |
| B. | Introduction of a new organ in an animal body with a view to create genetic mutation in the progenies of that animal |
| C. | Cultivation of organs in a laboratory through the synthesis of tissues |
| D. | The aspects of culture in community which are mainly dedicated by the need of a specified organ of the human body |
| Answer» B. Introduction of a new organ in an animal body with a view to create genetic mutation in the progenies of that animal | |
| 17. |
Protoplasts are the cells devoid of |
| A. | cell membrane |
| B. | cell wall |
| C. | both cell wall and cell membrane |
| D. | none of these |
| Answer» C. both cell wall and cell membrane | |
| 18. |
In a callus culture |
| A. | increasing level of cytokinin to a callus induces shoot formation and increasing level of auxin promote root formation |
| B. | increasing level of auxin to a callus induces shoot formation and increasing level of cytokinin promote root formation |
| C. | auxins and cytokinins are not required |
| D. | only auxin is required for root and shoot formation |
| Answer» B. increasing level of auxin to a callus induces shoot formation and increasing level of cytokinin promote root formation | |
| 19. |
Cellular totipotency is the property of |
| A. | plants |
| B. | animals |
| C. | bacteria |
| D. | all of these |
| Answer» B. animals | |