PSC BOTANY QUESTIONS AND ANSWERS
BOTANY QUESTIONS AND ANSWERS / PSC Questions and Answers:- PSC +2, Degree Level Questions and Answers - KAS Questions and Answers / PSC New Pattern Syllabus Question
* PSC Exam Questions and Answers
1. A Pigment responsible for photo morphogenetic responses is –
Answer: phytochrome
2. Father of gene therapy-
Answer: Anderson
3. Smallest living cell-
Answer: RBC
4. The disease dieback of shoots is caused due by the deficiency of the microelement-
Answer: Copper
5. Anomocytic type of stomata is the feature of -
Answer: Ranunculaceae
6. In a fluorescent microscope the radiations pass through a filter called-
Answer: exciter
7. Which is the smallest dicot plant-
Answer: Arcuthobium
8. Tetrand formation occurs in which stage of meiosis-
Answer: Pachytene
9. Chiasmata was first observed by-
Answer: Janson
10. Which plant has the longest fibre-
Answer: Linum usitatissimum
11. A xerophyte bryophyte-
Answer: Porella
12. The scaly membraneous perianth of Gramineae -
Answer: lodicules
13. The vector which can multiply in more than one host-
Answer: Shuttle vector
14. A plasmid with a phage gene is called-
Answer: plasmid
15. The stomata which guard cells have lost their power are-
Answer: Potomogeton type
16. The First bioinsecticide to be developed on a commercial scale-
Answer: Sporeine
17. How many meiotic divisions are needed for the development of 64 spores-
Answer: 16
18 Recently discovered non-leguminous nitrogen-fixing bacteria
Answer: Azotobacter paspali
19. Split genes are discovered by
Answer: Sharp & Robertis
20. Largest organelle of a plant cell-
Answer: Vacuole
21. Amino acid is known as bacterial amino acid –
Answer: Diamino pimelic acid
22. Rephano brassica is an example for –
Answer: allopolyploid
23. Type of RNA having the least secondary structure-
Answer: mRNA
24. One mole of glucose yield how many kilojoules of energy-
Answer: 2868KJ(686 kcal)
25. The absorption band is shown by chlorophyll in violet –
Answer: blue region sort band
26. Late blight of potato is caused by-
Answer: Phytophthora infestans
27. Which plant is called water fly trap-
Answer: Aldrovanda
28. Queen of essential oil-
Answer: Rose oil
29. Gymnosperm having single ovule in a female cone-
Answer: Taxus
30. Damping-off seedling is due to the fungi-
Answer: Pythium debaryanum
31. Intranuclear mitosis is known as –
Answer: Karyochoresis
32. The structure that is produced by the parasitic fungi to adhere to the host cell-
Answer: Appresorium
33. Heterothallism was first reported in mucor by-
Answer: Blakslee
34. Wart disease of Potato is caused by-
Answer: Synchitrium
35. A fluorescent dye used to stain DNA-
Answer: Ethidium Bromide
36. Which is the smallest virus-
Answer: Foot & mouth virus
37. An eight celled cubical shaped bacteria-
Answer: Sarcina
38. An outgrowth from the surface of seed having large oil storing, cells which are helpful in seed dispersal-
Answer: Elaiosomes
39. The linkage in starch is ------
Answer: glucosidic linkage
40. The railway sleepers are made from-
Answer: Cedrus deodar
41. Sudden appearance of ancestral characters in resent day organisms is called-
Answer: Atavism
42. First isolated restriction endonuclease is-
Answer: Hind-II
43. Darwinism was published in the year-
Answer: 1859
44. DNA formed from RNA by reverse transcription-
Answer: cDNA
45. A Part of DNA which codes for a single polypeptide chain-
Answer: Cistron
46. Father of plant physiology-
Answer: Stephen Hales
47. The chemical which blocks the PQ binding site of P.S.II-
Answer: DCMU
48. The simplest biological light energy transducer-
Answer: Bacteriorhodopsin
49. Reagent used in RNA extraction is –
Answer: Guanadinium thiocyanate
50. The base pairs present in one turn of A DNA-
Answer: II Base pairs
51. The reproductory organ of the Flowering plant
(a)Root (b) Leaf (c)Stem (d) Flower
Answer: (d)
52. Who is regarded as the father of Botany?
(a) Theophrastus (b) J.C. Bose
(c) Aristotle (d) Robert Hook
Answer: (a)
53. The tissues mainly responsible for food storage and conduction of substances:
(a) Schlerenchyma (b) Parenchyma
(c) Collenchyma (d) None of these
Answer: (b)
54. Entomophily is the pollination through:
(a) Birds (b) Animate (c) Insects (d) Wind
Answer: (c)
55. Which one of the following is an example of slowest growing plant
(a) Wolffia (b) Rafflesia (c) Saguaro (d) Vanilla
Answer: (c)
56. Which plant has the largest unbranched inflorescence?
(a) Cauliflower (b) Amorphophallus titanium
(c) Jack fruit tree (d) Coconut tree
Answer: (b)
57. Tea is grown in:
(a) Hot wet and hilly region (b) Flat region
(c) Winter season (d) very cold region
Answer: (a)
58. Maximum harm to a tree is caused by:
(a) Loss of half of its leaves (b) Loss of all leaves
(c) Loss of half of its branches (d) Loss of its bark
Answer: (b)
59. Which of the following is the best source of Iodine?
(a)Algae (b) Beans (c) Radish (d) Wheat
Answer: (a)
60. Lathyrism is caused by excessive consumption of.
(a) Kesari dal (b) Mustard oil
(c) Polished rice (d) Mushrooms
Answer: (a)
61. Sucrose content in sugarcane decreases:
(a) If high rainfall occurs during the period of growth of the plant
(b) If host occurs during the period of ripening
(c) If there is fluctuation in temperature during the period of growth of the plant
(d) If there is a high temperature during the time of ripening
Answer: (a)
62. Which is called the ‘Queen of Mangoes?
(a) Neelam (b) Selem
(c) Alphonsa (d) Kesar
Answer: (d)
63. Allium cepa is the botanical name at
(a) Potato (b) Tomato
(c) Brinjal (d) Onion
Answer: (d)
64. The plant-associated into biodiesel:
(a) Ricinus (b) Jatropha
(c)AI spice (d) Pinus
Answer: (b)
65.The birthplace of Jack Fruit tree:
(a) Asia (b) Africa
(c) Australia (d) America
Answer: (a)
66. A plant that stores food to stem:
(a) Vanda (b) Potato
(c) Amorphophalus (d) Suagarcane
Answer: (d)
67. Which is known as Tree of Peace”?
(a) Oak (b) Dates
(c) Olive (d) Pinus
Answer: (c)
68. Which is known as the Queen of Drugs’?
(a) Aspirin (b) Paracetamol
(c) Chloroform (d) Penicillin
Answer: (d)
69. The wood used for making Veena and Tamburu:
(a) Jack Fruit tree (b) Teak
(c) Mahagony (d) Deodar
Answer: (a)
70. Which is known as ‘Nature’s tonic?
(a) Banana (b) Apple
(c) Orange (d) Pineapple
Answer: (a)
71. The tendency of plants to grow towards the light:
(a) Geotropism (b) Phototropism
(c) Chemotropism (d) None of these
Answer: (b)
72. The reproductory organ of Plants:
(a) Root (b) Leaf
(c) Stem (d) Flower
Answer: (d)
73. The pigment imparts a yellow colour to flowers:
(a) Xanthophyll (b) Anthocyanin
(c) Betacyanin (d) Haemoglobin
Answer: (a)
74. Hormone that helps for flowering in plants:
(a) Auxin (b) Cytokine
(c) Ethylene (d) Florigen
Answer: (d)
75. Who discovered the cell?
(a) Robert Hook (b) JC Bose
(c) Galileo (d) None of these
Answer: (a)
76. The plant cell wall is made up of:
(a) Chitin (b) Cellulose
(c) Keratin (d) Fibrin
Answer: (b)
77. Who discovered that the plant body is made up of cells?
(a) M.J.Shleiden (b) Theodore Swan
(c) Robert Hook (d) None of these
Answer: (a)
78. What is known as the powerhouse of the cell?
(a) Ribosome (b) Lysosome
(c) Mitochondria (d) Nucleus
Answer: (c)
79. The colour of chloroplast:
(a) Red (b) White (c) Blue (d) Green
Answer: (d)
80. The metal present in chlorophyll:
(a) Calcium (b) Zinc
(c) Magnisium (d) Potassium
Answer: (c)
81. The tendency of plants to grow towards the direction of gravitational force:
(a) Geotropism (b) Phototropism
(c) Chemotropism (d) None of these
Answer: (a)
82. The rate of photosynthesis is highest in ..... light:
(a) Yellow (b) Blue
(c) Green (d) Red
Answer: (b)
83. The rate of photosynthesis is slowest in ..... light:
(a) Yellow (b) Green
(c) Blue (d) Red
Answer: (b)
84. Who discovered that the animal body is made up of cells?
(a) M.J.Schleiden (b) Theodore Schwan
(c) Robert Hook (d) None of these
Answer: (b)
85. The hormone that is helpful for ripening of fruits:
(a) Auxin (b) Cytokine
(c) Ethylene (d) Florigen
Answer: (c)
86. Who proved that plants are living organisms?
(a) JC Bose (b) M.J.Schleiden
(c) Robert Hook (d) Theodore Schwan
Answer: (a)
87. The crop that depends on rain for pollination:
(a) Pepper (b) Cardomom
(c) Paddy (d) Wheat
Answer: (a)
88. The organelle responsible for the maintenance of the structure of the cell?
(a) Nucleus (b) Endoplasmic reticulum
(c) Mitochondria (d) Vacuole
Answer: (b)
89. What is known as the ‘suicidal bags of the cell’?
(a) Mitochondria (b) Vacuole
(c) Nucleus (d) Lysosome
Answer: (d)
90. The plant with only one leaf:
(a) Colocasia (b) Amorphophalus
(c) Plantain (d) Vanda
Answer: (b)
91. The roots that contain chlorophyll capable of photosynthesis?
(a) Stilt roots (b) Assimilatory roots
(c) Prop roots (d) Vehimen roots
Answer: (b)
92. Halophytes are plants that grow in .......
(a) Saltwater (b) Deserts
(c) Trees (d) Mountains
Answer: (a)
93. The plant hormone that is useful for the formation of roots:
(a) Florigen (b) Auxin
(c) Cytokinins (d) Oestrogen
Answer: (c)
94. Cactus is a modified form of .....
(a) Root (b) Stem
(c) Leaf (d) None of these
Answer: (b)
95. The Rhizobium bacteria in the root nodules of pea plants are helpful for
........ fixation:
(a) Oxygen (b) Hydrogen
(c) CO2 (d) Nitrogen
Answer: (d)
96. The pollen grains in plants are produced in.......
(a) Anther (b) Carpel
(c) Ovary (d) Ovule
Answer: (a)
97. From which part of the plant, Quinine is obtained?
(a) Leaves (b) Fruits
(c) Stem bark (d) Roots
Answer: (c)
98. Brandy is made from:
(a) Grapes (b) Sugarcane
(c) Barley (d) Apple
Answer: (a)
99. Which plant is cultivated to increase the fertility of soil?
(a) Paddy (b) Wheat
(c) Sugarcane (d) Pea
Answer: (d)
100. Which tissue is related to the formation of new cells?
(a) Parenchyma (b) Collenchyma
(c) Meristem (d) Schlerenchyma
Answer: (c)
101. Mahali disease affects .......
(a) Rubber (b) Paddy
(c) Araca plant (d) Coconut plant
Answer: (c)
102. Plants respire through:
(a) Stomata (b) Meristem
(c) Anther (d) Ovary
Answer: (a)
103. The hallucinogen Marijuana is obtained from:
(a) Hemp (b) Cinchona
(c) Poppy (d) Rauwolfia
Answer: (a)
104. The stimulant Cocaine is obtained from the leaves of:
(a) Coffee plant (b) Tea plant
(c) Cocoa (d) Rauwolfia
Answer: (c)
105. Dalbergia latifolia is the botanical name of:
(a) Coconut tree (b) Guava
(c) Tomato (d) Redwood tree
Answer: (d)
106. The father of tissue culture:
(a) Linneaus (b) Haberlandt
(c) Mendel (d) Darwin
Answer: (b)
107. Spermology is the study of:
(a) Weeds (b) Fruits
(c) Seeds (d) Diseases
Answer: (c)
108. The native place of Castor:
(a) Mexico (b) Egypt
(c) Australia (d) Brazil
Answer: (b)
109. Cotton fibre is obtained from which part of the plant?
(a) Fruit (b) Root
(c) Flower (d) Leaf
Answer: (a)
110. The edible part in a Jack fruit:
(a) Seed (b) Perianth
(c) Anther (d) None of these
Answer: (b)
111. Which tree supplies solidified milky juice used in chewing gums?
(a) Sapodilla (b) Willow
(c) Poppy (d) Rubber
Answer: (a)
112. Which tree is sacred to Buddhists?
(a) Neem (b) Ashoka
(c) Tulsi (d) Lotus
Answer: (b)
113.The leaf used to make ‘beedi’:
(a) Teak (b) Tendu
(c) Jack tree (d) Palm
Answer: (b)
114. What is the basic classification unit of plants?
(a) Genus (b) Class
(c) Order (d) Species
Answer: (d)
115. What is the chief food factor contained in cereals?
(a) Protein (b) Fat
(c) Mineral (d) Starch
Answer: (d)
116. Entomophily is the pollination through:
(a) Birds (b) Animals
(c) Insects (d) Wind
Answer: (c)
117. The tissues that provide support to growing shoots and leaves of the plant body:
(a) Parenchyma (b) Schlerenchyma
(c) Collenchyma (d) Phloem
Answer: (c)
118. The tendency of plants to grow in response to the influence of chemicals:
(a) Geotropism (b) Phototropism
(c) Chemotropism (d) None of these
Answer: (c)
119. The pigment imparts purple/blue colour to flowers:
(a) Xanthophyll (b) Anthocyanin
(c) Betacyanin (d) Haemoglobin
Answer: (b)
120. Ornithophily is the pollination through:
(a) Birds (b) Animals
(c) Insects (d) Wind
Answer: (a)
121. Zoophily is the pollination through:
(a) Insects (b) Wind
(c) Animals (d) Birds
Answer: (c)
122. The hard parts of the plant body are made up of the tissues:
(a) Collenchyma (b) Parenchyma
(c) Schlerenchyma (d) Phloem
Answer: (c)
123. The Japanese art of flower arrangement:
(a) Origami (b) Ikebana
(c) Harakiri (d) Sudoku
Answer: (b)
124. The food materials from leaves are carried to various parts of the plant body by:
(a) Phloem (b) Xylem
(c) Meristem (d) None of these
Answer: (a)
125. The tissues mainly responsible for food storage and conduction of substances:
(a) Schlerenchyma (b) Parenchyma
(c) Collenchyma (d) None of these
Answer: (b)
126. The plant used in space vehicles to maintain the level of oxygen:
(a) Chlorella (b) Azolla
(c) Cactus (d) Porella
Answer: (a)
127. Which is regarded as the basis of life?
(a) Cytoplasm (b) Protoplasm
(c) Chromosome (d) Gene
Answer: (b)
128. Penicellin was discovered in:
(a) 1908 (b) 1910
(c) 1915 (d) 1928
Answer: (d)
129. Xylology is the study of:
(a) Fruits (b) Wood
(c) Seed (d) Flower
Answer: (b)
130. Xerophytes are plants in:
(a) Deserts (b) Oceans
(c) Ponds (d) Rivers
Answer: (a)
131. The study of trees:
(a) Dendrology (b) Pomology
(c) Xylology (d) Oenology
Answer: (a)
132. Who is the father of the Theory of the Inheritance of Acquired Characters?
(a) Lamarch (b) De Vries
(c) Darwin (d) Johanson
Answer: (a)
133. Who is the father of Mutation theory?
(a) Darwin (b) Lamarch
(c) De Vries (d) Mendel
Answer: (c)
134. Who coined the word ‘Gene’?
(a) Gregor Mendel (b) Lamarch
(c) Johanson (d) Bateson
Answer: (c)
135. Stratosphere Giant, the tallest tree in the world, is in:
(a) USA (b) Russia
(c) China (d) France
Answer: (a)
136. Annual rings are helpful to determine the .......of trees?
(a) height (b) Genus
(c) Yield (d) age
Answer: (d)
137. The study of fruits:
(a) Sitology (b) Dendrology
(c) Trichology (d) Pomology
Answer: (d)
138. Sericulture is the cultivation of:
(a) Silkworm (b) Honey bee
(c) Garden plants (d) Prawn
Answer: (a)
139. Yellow revolution is related to the increased production of:
(a) Oilseeds (b) Pharmaceuticals
(c) Wheat (d) Cement
Answer: (a)
140. Black soil is most suitable for the cultivation of:
(a) Jute (b) Wheat
(c) Rice (d) Cotton
Answer: (d)
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