MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Double fertilization is a characteristic of [AFMC 1984; CPMT 1987, 93, 94; Bihar 1995; BHU 1999, 2000; Kerala CET 2003; MP PMT 2004] |
| A. | Gymnosperms |
| B. | Bryophytes |
| C. | Angiosperms |
| D. | Pteridophytes |
| Answer» D. Pteridophytes | |
| 2. |
The formation of embryo without fusion of gametes is termed, as [MP PMT 2003] |
| A. | Apospory |
| B. | Isogamy |
| C. | Apogamy |
| D. | Syngamy |
| Answer» D. Syngamy | |
| 3. |
After fertilization the outer integument forms [MHCET 2004] |
| A. | Testa |
| B. | Tegmen |
| C. | Perisperm |
| D. | Pericarp |
| Answer» B. Tegmen | |
| 4. |
In an angiospermic plant, endosperm is formed due to fertilization of secondary nucleus but it is absent in some of the seeds viz. pea, bean, phaseolus (moong) etc. It is due to lack of [MP PMT 1997] |
| A. | Certain enzymes |
| B. | Dicotyledonous hormone |
| C. | Growth hormone |
| D. | None of the above |
| Answer» E. | |
| 5. |
The process of fusion between male nucleus and egg nucleus is called as [MP PMT 1995] |
| A. | Syngamy |
| B. | Triple fusion |
| C. | Double fertilization |
| D. | Conjugation |
| Answer» B. Triple fusion | |
| 6. |
By double fertilization is formed [MP PMT 1994, 2000] |
| A. | Endosperm |
| B. | Megaspore |
| C. | Seed |
| D. | Fruit |
| Answer» B. Megaspore | |
| 7. |
Fertilization of egg takes place inside [DPMT 1993] |
| A. | Anther |
| B. | Stigma |
| C. | Pollen tube |
| D. | Embryo sac |
| Answer» E. | |
| 8. |
Which one is an example of triploid tissue [CPMT 1973, 78, 93, 94] |
| A. | Onion root |
| B. | Fern prothallus |
| C. | Maize and lily endosperm |
| D. | None of the above |
| Answer» D. None of the above | |
| 9. |
In which one of the following would you expect to find glyoxysomes [AIIMS 2005] |
| A. | Endosperm of wheat |
| B. | Endosperm of castor |
| C. | Palisade cells in leaf |
| D. | Root hairs |
| Answer» C. Palisade cells in leaf | |
| 10. |
Xenia is an effect of pollen grains on [CPMT 1984; AIIMS 2002] |
| A. | Embryo |
| B. | Endosperm |
| C. | Embryo sac |
| D. | Nucellus |
| Answer» C. Embryo sac | |
| 11. |
Endospermic nucleus is usually [MP PMT 1994, 95] |
| A. | Haploid |
| B. | Diploid |
| C. | Triploid |
| D. | Tetraploid |
| Answer» D. Tetraploid | |
| 12. |
Dicot embryo consists of [DPMT 1993] |
| A. | Radicle and plumule |
| B. | Radicle, plumule, cotyledons and sometimes endosperm |
| C. | Radicle, plumule, cotyledons and tegmen |
| D. | Radicle, plumule, cotyledons, tegmen and testa |
| Answer» C. Radicle, plumule, cotyledons and tegmen | |
| 13. |
If the diploid number of an angiospermic plant is 24, the number of chromosomes in the pollen grain, endosperm and integument will be [CPMT 2000] |
| A. | 12, 36, 12 |
| B. | 12, 24, 36 |
| C. | 12, 12, 36 |
| D. | 12, 36, 24 |
| Answer» E. | |
| 14. |
Despite high level of heterozygosity, the progeny derived from seed of a cross pollinated plant was found to be completely uniform. One reason for this may the phenomenon of [BHU 1994] |
| A. | Parthenocarpy |
| B. | Apomixis |
| C. | Induced mutation |
| D. | Polyploidy |
| Answer» C. Induced mutation | |
| 15. |
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because [NCERT 1983; CBSE PMT 1989; JIPMER 1993] |
| A. | Laser beam stimulates pollen germination and pollen tube growth |
| B. | The laser beam does not damage the region from which pollen tube emerges |
| C. | The contents of killed generative cell permit germination and pollen tube growth |
| D. | The vegetative cell has not been damaged |
| Answer» E. | |
| 16. |
Read the assertion and reason carefully: Assertion: Chasmogamous flowers require pollinating agents. Reason : Cleistogamous flowers do not expose their sex organs. |
| 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 | |
| 17. |
Read the assertion and reason carefully: Assertion: The two cotyledons in seed are embryonic leaves. Reason : The embryo contains radicle and plumule. [AIIMS 2002] |
| 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 | |
| 18. |
Read the assertion and reason carefully: Assertion: Cellular endosperm is formed by both nuclear division and wall formation. Reason : It lacks haustoria. |
| 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» D. If both the assertion and reason are false | |
| 19. |
Read the assertion and reason carefully: Assertion: Megaspore mother cell undergoes meiotic division. Reason : All four megaspores form female gametophyte. |
| 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» D. If both the assertion and reason are false | |
| 20. |
Which type of propagation is better for the plant |
| A. | By seeds |
| B. | By tubers |
| C. | By bulbs |
| D. | By rhizome |
| Answer» B. By tubers | |
| 21. |
The part which is grafting on stalk of another tree is called [Haryana PMT 2005] |
| A. | Graft |
| B. | Bulbil |
| C. | Bud |
| D. | scion |
| Answer» E. | |
| 22. |
The reason of formation of embryoid from pollen grain in a tissue culture medium is [CBSE PMT 2002] |
| A. | Organogenesis |
| B. | Double fertilization |
| C. | Test tube culture |
| D. | Cellular totipotency |
| Answer» E. | |
| 23. |
The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is called [BHU 1994; AFMC 1994, 2002; AIIMS 2001] |
| A. | Zygospory |
| B. | Aplanospory |
| C. | Apospory |
| D. | Apogamy |
| Answer» E. | |