Botany Sample Question Papers

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Botany Sample Question Papers

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Sample Question Papers of Botany

1. Covered smut of barley is caused by
(A) Ustilago nuda
(B) Ustilago tritici
(C) Ustilago hordei
(D) Ustilago grdminis

2. Green mould is common name for
(A) Neurospora
(B) Mucor
(C) Penicillium
(D) Saccharomyces

3. The most economically important bryophyte among the following is
(A) Funaria
(B) Marchantia
(C) Riccia
(D) Sphagnum

4. Gemma cups are found in
(A) Sphagnum
(B) Marchantia
(C) Riccia
(D) Anthoceros

5. Pseudoelaters are found in the sporophyte of
(A) Marchantia
(B) Pellia
(C) Polytrichum
(D) Anthoceros

6. Rhizoids of Sphagnum are
(A) Unicellular
(B) green-coloured
(C) unicellular with septa
(D) multicellular with oblique septa

7. The common element in the xylem of pteridophyte is
(A) Trachea
(B) Tracheid
(C) xylem parenchyma
(D) xylem fibre

8. Protocorm is found in
(A) Lycopodium
(B) Selaginella
(C) Equisetum
(D) Marsilea

9. The stele in the rhizome of Marsilea is
(A) protostele
(B) haplostele
(C) dictyostele
(D) amphiphloic siphonostele

10. Formation of sporophyte from a vegetative portion of prothallus is called
(A) Apocarpy
(B) Apogamy
(C) Apomixis
(D) apospory

11. Which of the following does not have a pith?
(A) Protostele
(B) Solenostele
(C) Siphonostele
(D) Dictyostele

12. Coralloid roots occur in
(A) Cycas
(B) Pinus
(C) Gnetum
(D) Ephedra

13. Cycas ovule is
(A) anatropous
(B) orthotropous
(C) hemianatropous
(D) campylotropous

14. Pinus differs from angiosperm in
(A) tree habit
(B) green leaves
(C) presence of wood
(D) ovules without an enclosing ovary

15. The female gametophyte of Gnetum is
(A) Monosporic
(B) Bisporic
(C) Trisporic
(D) tetrasporic

16. The fossil organisms which show characters of two different groups of animals are called
(A) transitional forms
(B) missing links
(C) transitory organisms
(D) past links

17. Linnaeus’ system of classification is
(A) artificial system
(B) natural system
(C) phylogenetic system
(D) synthetic system

18. Spikelets with glumes are found in
(A) Cyperaceae
(B) Poaceae
(C) Arecaccae
(D) Araceae

19. Allium cepa belongs to
(A) Musaceae
(B) Arecaceae
(C) Brassicaceae
(D) Liliaceae

20. The botanical name of sunflower is
(A) Helianthus annuus
(B) Helianthus tuberosus
(C) Tagetes patula
(D) Tagetes erecta

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21. Osmotic pressure of a solution is usually measured in
(A) Kelvin
(B) Joule
(C) Pascal
(D) newton

22. Root pressure is developed in
(A) Xylem
(B) Phloem
(C) Cortex
(D) pith

23. Which one of the following theories for ascent of sap was proposed by Sir J. C. Bose?
(A) Pulsation theory
(B) Root pressure theory
(C) Relay pump theory
(D) Transpiration pull theory

24. When the plant cells are fully turgid, the turgor pressure is equal and opposite to the
(A) diffusion pressure deficit
(B) osmotic pressure
(C) wall pressure
(D) diffusion pressure

25. Conduction of sap in plants occurs through
(A) Heartwood
(B) Bark
(C) Xylem
(D) cortex

26. The water potential and osmotic potential of pure water are
(A) 100 and zero
(B) zero and zero
(C) 100 and 100
(D) zero and 100

27. Rate of transpiration can be measured by
(A) Ganong’s potometer
(B) Auxanometer
(C) Respirometer
(D) porometer

28. Stomata open at night in
(A) CAM plants
(B) C3 plants
(C) C4 plants
(D) succulent plants

29. The most abundant element present in plant is
(A) Nitrogen
(B) manganese
(C) carbon
(D) iron

30. In N2-fixation process, nitrite is converted to nitrate by
(A) Nitrobacter
(B) Azotobacter
(C) Nitrosomonas
(D) Azospirillum

31. In photosynthesis, reaction centre of pigment system-I is
(A) P680
(B) P690
(C) P700
(D) P720

32. Release of water from plants as water droplet is known as
(A) root pressure
(B) transpiration
(C) osmotic pressure
(D) guttation

33. The end products of aerobic respiration are
(A) sugar and oxygen
(B) water and energy
(C) CO2, H2O and energy
(D) CO2 and energy

34. Apical dominance can be overcome by the application of
(A) Auxin
(B) Gibberellin
(C) Cytokinin
(D) florigen

35. Which of the following is a long-day plant?
(A) Glycine max
(B) Spinach
(C) Mirabilis jalapa
(D) Soya bean

36. Ecological succession on the sandy soil is called
(A) Psammosere
(B) Xerosere
(C) Hydrosere
(D) holosere

37. Mendel’s second law is the law of
(A) independent assortment
(B) segregation
(C) dominance
(D) polygenic inheritance

38. The genotype of a plant showing a dominant phenotype can be determined by
(A) Backcross
(B) Testcross
(C) dihybrid cross
(D) pedigree analysis

39. Down’s syndrome is due to
(A) Linkage
(B) sex-linked inheritance
(C) crossing-over
(D) non-disjunction of chromosome

40. Chemical theory of origin of life was given by
(A) Stanley Miller
(B) Spallazani
(C) Oparin and Haldane
(D) Louis Pasteur

41. The wings of bat and bird are
(A) homologous but not analogous
(B) neither homologous nor analogous
(C) analogous but not homologous
(D) vestigial

42. Galapagos Islands are associated with the name of
(A) Lamarck
(B) Wallace
(C) Darwin
(D) Weismann

43. Which one is linked to evolution?
(A) Extinction
(B) Competition
(C) Variation
(D) Reproduction

44. Which part of Rauwolfia plant is used to obtain the alkaloid reserpine?
(A) Leaf
(B) Bark
(C) Root
(D) Stem

45. The botanical name of jute is
(A) Shorea robusta
(B) Corchorus capsularis
(C) Tectona grandis
(D) Mangifera indica

46. Protein is obtained mainly from
(A) belladona
(B) rice
(C) mustard
(D) soya bean

47. The sugar present in sugarcane is
(A) Glucose
(B) Fructose
(C) Sucrose
(D) ribose

48. Green tea is prepared by
(A) fermentation of tea leaves
(B) without fermentation of tea leaves
(C) adding special type of enzyme
(D) adding green colour

49. Chromosomes are best seen in
(A) Interphase
(B) Prophase
(C) Metaphase
(D) telophase

50. Which of the following is structural subunit of DNA?
(A) Protein
(B) Carbohydrate
(D) Nucleotide