Pollen Grain MCQ
What are Pollen grains?
- The pollen grain is a microscopic, non-motile, haploid, unicellular body with a single nucleus.
- It is also known as microspores.
- The study of pollen is known as palynology.
- The pollen grain is produced in the anther of the flower, which is the terminal portion of the stamens.
- In anther, each microspore mother cell divides meiotically to form a tetrad of haploid microspores (pollen grains) this process is known as microsporogenesis.
- The pollen grain is essential for the reproduction of gymnosperms and angiosperms.
- Pollen is the set of tiny grains produced by the flowers of angiosperms, which are the male reproductive elements or microgametophytes, where the gametes that will fertilize the eggs are found, which will later turn into seeds.
Pollen Grain MCQ Questions and Answers:
1. Pollen grains are produced in——
2. Pollen grains represent——-
(1) The future sporophyte
(2) The sporophyte
(3) The gametophyte
(4) The male gametophyte
3. The mature pollen grain contains——
(1) 3 cell
(2) 7 cells
(3) 2 cells
(4) 1 cell
4. The larger cell of a pollen grain with an irregularly shaped nucleus is——
(1) Apical cell
(2) Generative cell
(3) Vegetative cell
(4) Basal cell
5. Transfer of a pollen grain to the stigma of the same plant is called——–
6. Which structure is produced by the germination of pollen grain?
(1) Pollen tube
7. The pollen grains of flowers pollinated by insects are :
(1) smooth and dry
(2) rough and sticky
(3) rough and dry
(4) large and, showy
8. The minimum number of meiotic divisions required to obtain 100 pollen grains of wheat is…..
9. In dicots the pollen grains possess :
(1) two germ pores
(2) three germ pores
(3) four germ pores
(4) one germ pore
11. Pollen tube develops from
(1) Generative cell
(2) Male gametes
(3) Vegetative cell
(4) Vegetative nucleus
12. Longest pollen tube is found in :
13. In over 60% of angiosperms, pollen grains are shed at:-
(1) One celled stage
(2) Three nuclei stage
(3) Two-celled stage
(4) Three-celled stage
14. Pollen grains of many species cause severe allergies & bronchial afflictions in some people often leading to chronic respiratory disorders such as:-
(3) Both 1 & 2
15. In a pollen grain the small cell is spindle-shaped, with dense cytoplasm:–
(1) Vegetative cell
(2) Generative cell
(3) Tube cell
16. Pollen grain along with the growing tube has how many haploid nuclei?
17. Sporopollenin in the exine of pollen grain can be degraded by :
(1) high temperature
(2) low pH (strong acids)
(3) some enzymes
(4) can’t be degraded
18. Which one of the following statements is wrong?
(1) Pollen grains in some plants remain viable for months.
(2) Intine is made up of cellulose and pectin.
(3) When pollen is shed at two-a celled state, double fertilization does not take place.
(4) Vegetative cell is larger than a generative cell.
19. What is the function of the germ pore?
(1) Initiation of pollen tube
(2) Release of male gametes
(3) Emergence of the radicle
(4) Absorption of water for seed germination
20. Which of the following statements is not correct?
(1) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
(2) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
(3) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
(4) Some reptiles have also been reported as pollinators in some plant species.
21. Which of the following statements is not true?
(1) Tapetum helps in the dehiscence of anther
(2) Exine of pollen grains is made up of sporopollenin
(3) Pollen grains of many species cause severe allergies
(4) Stored pollen in liquid nitrogen can be used in the crop breeding programs
22. Which one of the following statements is not true?
(1) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people
(2) The flowers pollinated by flies and bats secrete foul odor to attract them
(3) Honey is made by bees by digesting – pollen collected from flowers
(4) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups