- Keneitsino Lydia
- April 15, 2026
Master Microsporogenesis And Pollen Grain MCQs Class 12 Biology With Answers – Ultimate Practice Guide
Understanding the topic of reproduction in flowering plants is essential for Class 12 Biology aspirants, especially for competitive exams like NEET. One of the most important sections in this chapter is microsporogenesis and pollen grain formation. That is why practicing Microsporogenesis And Pollen Grain MCQs Class 12 Biology With Answers becomes crucial for mastering the concepts thoroughly.
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Microsporogenesis And Pollen Grain MCQs Class 12 Biology With Answers:
1. Which one of the following is surrounded by a callose wall?
A. Pollen grain
B. Microspore mother cell
C. Male gamete
D. Egg
Answer: B
Explanation: Microspore mother cells are surrounded by a callose wall during meiosis, which helps in proper separation of microspores.
2. Male gametes in angiosperms are formed by the division of:
A. Microspore mother cell
B. Microspore
C. Generative cell
D. Vegetative cell
Answer: C
Explanation: The generative cell divides mitotically to form two male gametes.
3. Rarely among angiosperms, pollen grains influence the endosperm. This is called:
A. Metaxenia
B. Nemec phenomenon
C. Xenia
D. Mesogamy
Answer: C
Explanation: Xenia refers to the effect of pollen on endosperm.
4.Arrange the correct sequence of events in microsporogenesis:
A. Microspore tetrad → Meiosis of pollen mother cell → Anther maturation → Separation of pollen grains
B. Meiosis of pollen mother cell → Microspore tetrad → Separation of pollen grains → Anther maturation
C. Meiosis of pollen mother cell → Microspore tetrad → Anther maturation → Separation of pollen grains
D. Microspore tetrad → Separation → Meiosis → Maturation
Answer: C
Explanation: Pollen mother cell undergoes meiosis → forms microspore tetrad → anther matures → microspores separate into pollen grains
5. Which of the following cells during gametogenesis is normally diploid?
A. Spermatid
B. Spermatogonia
C. Secondary polar body
D. Primary polar body
Answer: B
Explanation: Spermatogonia are diploid stem cells.
6. Male gametophyte in angiosperms produces:
A. Three sperms
B. Two sperms and a vegetative cell
C. Single sperm and a vegetative cell
D. Single sperm and two vegetative cells
Answer: B
Explanation: Produces 2 male gametes + 1 vegetative cell.
7. Function of filiform apparatus is to:
A. Recognize pollen at stigma
B. Stimulate generative cell division
C. Produce nectar
D. Guide pollen tube entry
Answer: D
Explanation: It guides the pollen tube into synergids.
8. Which statement is correct?
A. Tapetum nourishes developing pollen
B. Outer layer is intine
C. Sporogenous tissue is haploid
D. Endothecium produces microspores
Answer: A
Explanation: Tapetum provides nutrition to pollen grains.
9. Function of germ pore in flowering plants:
A. Initiation of pollen tube
B. Release of male gametes
C. Emergence of radicle
D. Absorption of water
Answer: A
Explanation: Germ pore helps in pollen tube formation.
10. Microspore mother cells required to produce 100 pollen grains:
A. 75
B. 100
C. 25
D. 50
Answer: C
Explanation: 1 MMC → 4 pollen grains → 100/4 = 25.
11. Identify parts A, B, and C in T.S. of anther:
A. Connective tissue, Pollen grains, Endothecium
B. Endothecium, Connective tissue, Pollen grains
C. Pollen grains, Connective tissue, Endothecium
D. Endothecium, Pollen grains, Connective tissue
Answer: A
Explanation: Correct labeling based on standard diagram.
12.
If a stock has 2n = 48 and scion microspore mother cell has 2n = 24, then the number of chromosomes in root cell and microspores respectively are:
A. 12, 48
B. 48, 12
C. 24, 12
D. 24, 96
Answer: B
Explanation:Root cells (from stock) undergo mitosis, so chromosome number remains 2n = 48
- Microspore mother cell (2n = 24) undergoes meiosis, so microspores become n = 12
Therefore: Root cell = 48, Microspores = 12
13. Pollen tube forms after killing generative cell because:
A. Laser stimulates growth
B. Tube region unaffected
C. Dead cell helps growth
D. Vegetative cell intact
Answer: D
Explanation: Vegetative cell controls pollen tube growth.
14. Viability of pollen grains in rice and wheat:
A. 30 minutes
B. 10 minutes
C. 60 minutes
D. 90 minutes
Answer: A
Explanation: Viability is very short (~30 min).
15. Effect of foreign pollen on endosperm:
A. Pollen culture
B. Xylem
C. Endosperm
D. Xenia
Answer: D
Explanation: Xenia affects endosperm characteristics.
16. First cell of male gametophyte:
A. Vegetative cell
B. Generative cell
C. Pollen grain
D. Microgametogenesis
Answer: C
Explanation: Pollen grain is the initial male gametophyte.
17. Sequence of anther wall layers:
A. Epidermis → Endothecium → Middle → Tapetum
B. Epidermis → Middle → Endothecium → Tapetum
C. Tapetum → Middle → Endothecium → Epidermis
D. Epidermis → Middle → Tapetum → Endothecium
Answer: A
Explanation: Correct anatomical order.
18. Ubisch bodies are produced by:
A. Tapetum
B. Vascular bundles
C. Endothecium
D. Sporogenous tissue
Answer: A
Explanation: Produced by tapetum for pollen wall formation.
19. Epipetalous and syngenesious stamens occur in:
A. Solanaceae
B. Brassicaceae
C. Fabaceae
D. Asteraceae
Answer: D
Explanation: Characteristic feature of Asteraceae.
20. Most resistant biological material:
A. Lignin
B. Hemicellulose
C. Sporopollenin
D. Cellulose
Answer: C
Explanation: Found in exine, highly resistant.
21. Hybrid seed production requires removal of:
A. Stigma
B. Ovary
C. Anther
D. Ovule
Answer: C
Explanation: Prevents self-pollination.
22. Exine of pollen grain is made up of:
A. Pectocellulose
B. Lignocellulose
C. Sporopollenin
D. Pollenkitt
Answer: C
Explanation: Provides protection.
23. Microsporangia in monothecous anther:
A. One
B. Two
C. Four
D. Many
Answer: B
Explanation: One lobe → 2 microsporangia.
24. Haploid plants are produced by:
A. Pollen culture
B. Cotyledon culture
C. Embryo culture
D. Meristem culture
Answer: A
Explanation: Pollen grains are haploid.
25. Anther dehiscence occurs due to:
A. Epidermis
B. Endothecium
C. Middle layer
D. Tapetum
Answer: B
Explanation: Endothecium helps in splitting anther.
26. Nuclei present in pollen grain at shedding:
A. One
B. One or two
C. Two or three
D. Only two
Answer: C
Explanation: Depends on stage of development.
27. Male gamete is represented by:
A. Endosperm
B. Synergids
C. Pollen grain
D. Antipodals
Answer: C
Explanation: Carries male gametes.
28. Filiform apparatus is found in:
A. Tapetum
B. Synergids
C. Antipodals
D. Anther wall
Answer: B
Explanation: Helps guide pollen tube.
29. Ubisch bodies function in:
A. Meiosis initiation
B. Nutrition
C. Exine formation
D. Embryo development
Answer: C
Explanation: Help in sporopollenin deposition.
