GK Questions and answers : Botany & Zoology

GK QUESTIONS AND ANSWERS

Hi friends ,

You can attempt G.K questions and answers for fun too. There are a lot of General Knowledge questions and answers on this site.So read it regularly and learn more. Here i'm note down several questions and answers in Biology.These questions and answers are very helpful for all type of competitive exam ,especially Kerala PSC ,UPSC, SSC, and other GOV.Exams

1. An ecosystem has two components namely:
A) Weeds and trees
B) Biotic and abiotic
C) Frogs and men
D) Plants and animals
Ans : B) Biotic and abiotic

2. Plants that grow under average temperature and moisture condition are called:
A) Halophytes
B) Hydrophytes
C) Mesophytes
D) Xerophytes
Ans : C) Mesophytes

3. Potato is a modified from of:
A) Root
B) Stem
C) Fruit
D) Leaf
Ans : B) Stem

4. The branch of zoology which deals with the study of tissue is:
A) Pathology
B) Geology
C) Histology
D) Physiology
Ans : C) Histology

5. The most important foods are derived from:
A) Leaves
B) Stem
C) Fruits
D) Roots
Ans : C) Fruits

6. Which of the following are mostly woody trees ,always perennials and never herbs or annuals?
A) Angiosperms
B) Gymnosperms
C) Pteridophytes
D) Bryophytes
Ans : B) Gymnosperms

7. Which of the following ecosystems covers the largest area of the earth's surface?
A) Desert ecosystem
B) Grassland ecosystem
C) Mountain ecosystem
D) Marine ecosystem
Ans : D) Marine ecosystem

8. Bacterial action changes dead leaves into:
A) Algae
B) Fungi
C) Humus
D) None of these
Ans : C) Humus

9. The function of a cell wall is:
A) To give definite shape to the cell
B) To provide mechanical strength and protection to the cell
C) To prevent the cell from desiccation
D) All of the above
Ans : D) All of the above

10. The leaf blight of paddy is caused by:
A) Bacteria
B) Virus
C) Nematodes
D) Fungus
Ans : A) Bacteria

11. To prevent loss of weight plants reduce transpiration by:
A) Reducing the size of leaves
B) Developing hair around stomata
C) Shedding of leaves
D) All are correct
Ans : D) All are correct

12. Which of the following is a cellulose fiber?
A) Cotton
B) Wool
C) Rayon
D) Polyster
Ans : A) Cotton

13. Which one of the following grows under the plant?
A) Cabbage
B) Bengal gram
C) Peanuts
D) Castor
Ans : C) Peanuts

14. Within the cell,the site of respiration is the :
A) Golgibodies
B) Ribosomes
C) Mitochondria
D) Nucleus
Ans : C) Mitochondria

15. Arabica and Robusta are two main varieties of ................... cultivated in India:
A) Coffee
B) Tea
C) Tobacco
D) Coconut
Ans : A) Coffee

16. Economically the most important forest of India
A) Tidal
B) Tropical deciduous forest
C) Thorn forest
D) Evergreen forest
Ans : B) Tropical deciduous forest

17. The crop which considers frost as its enemy:
A) Rubber
B) Tea
C) Coffee
D) Tobacco
Ans : D) Tobacco

18. Transport of food from leaves to other parts of plant is termed as :
A) Translocation
B) Transpiration
C) Transmutation
D) Guttation
Ans : A) Translocation

19. Which is regarded as a link between the living and the non-living?
A) Amoeba
B) Virus
C) Bacteria
D) RNA
Ans : B) Virus

20. Which of the following has been found useful in keeping cholesterol level down?
A) Tulsi
B) Serpentina
C) Turmeric
D) Garlic
Ans : D) Garlic

21. Number of bones in the appendicular skeleton:
A) 206
B) 216
C) 126
D) 80
Ans : C) 126

22. Who discovered stethoscope ?
A) Rene laennac
B) William Harvey
C) William Einthoven
D) None of these
Ans : A) Rene laennac

23. An organ that is not affected by cancer:
A) Bones
B) Liver
C) Eye
D) Heart
Ans : D) Heart

24. Myrmiecology is the study of:
A) Ants
B) Crabs
C) Snails
D) Snakes
Ans : A) Ants

25. Which blood group is called 'universal donor'?
A) A
B) B
C) AB
D) O
Ans : D) O

26. Which of the following is the most powerful bird ?
A) Harpy Eagle
B) Kiwi
C) Blue Tit
D) Swift
Ans : A) Harpy Eagle

27. The part of the teeth where nerves and blood vessels are situated
A) Crown
B) Root
C) Pulp cavity
D) None of these
Ans : C) Pulp cavity

28. The hormones that helps to convert glycogen into glucose:
A) Insulin
B) Ptylin
C) Glucagon
D) Adrenalin
Ans : C) Glucagon

29. Nasopharyngitis is the scientific name of:
A) Cold
B) Elephantiasis
C) Malaria
D) Rickets
Ans : A) Cold

30. Dengue fever is transmitted by:
A) Mosquito
B) Rat
C) Rat flea
D) Dog
Ans : A) Mosquito

31. The pigment that gives color to skin:
A) Albumin
B) Haemoglobin
C) Melanin
D) None of these
Ans : C) Melanin

32. The largest artery in human body;
A) Aorta
B) Pulmonary artery
C) Superior venacava
D) None of these
Ans : A) Aorta

33. Seat of memory and imagination is :
A) Cerebellum
B) Medulla oblongata
C) Cerebrum
D) None of these
Ans : C) Cerebrum

34. The brain uses about .............% of the oxygen a man breathes:
A) 80
B) 60
C) 40
D) 20
Ans : D) 20

35. Which type of lens is used to correct myopia?
A) Convex lens
B) Concave lens
C) Biconcave lens
D) Biconvex lens
Ans : B) Concave lens

36. Anti-rachitic vitamin is:
A) C
B) A
C) D
D) B2
Ans : C) D

37. The smallest bone in human body is stapes. It is in:
A) Middle ear
B) Inner ear
C) External ear
D) None of these
Ans : A) Middle ear

38. What is known as disease of appetite or disease of starvation?
A) Marasmus
B) Scurvy
C) AIDS
D) Malaria
Ans : A) Marasmus

39. Which organ is known as the central chemical laboratory in the body ?
A) Lungs
B) Heart
C) Pancreas
D) Liver
Ans : D) Liver

40. An important constituent of tooth paste is................
A) Calcium flouride
B) Copper sulphate
C) Sodium chloride
D) Calcium sulphate
Ans : A) Calcium flouride

41. Artocarpus heterophyllusis the botanical name of:
A) Coconut tree
B) Guava
C) Tomato
D) Jack tree
Ans : D) Jack tree

42. Which one of the following does not belong to grass family ?
A) Sugarcane
B) Maize
C) Wheat
D) Beans
Ans : D) Beans

43. Which one of the following is an epiphytic plant?
A) Bacteria
B) Mushroom
C) Orchid
D) Mould
Ans : C) Orchid

44. Brandy is mostly made from:
A) Grapes
B) Sugarcane
C) Barley
D) Apple
Ans: A) Grapes

45. During photosynthesis green plants absorb:
A) Nitrogen
B) Carbon dioxide
C) Carbon monoxide
D) Oxygen
Ans : B) Carbon dioxide

46. Which one of the following is not a plant product ?
A) Caffeine
B) Piperine
C) Nicotin
D) Saccharin
Ans : D) Saccharin

47. Which plant is cultivated to increase the fertility of soil ?
A) Paddy
B) Wheat
C) Sugarcane
D) Pea
Ans :D) Pea

48. From which part of the plant,Quinine is obtained ?
A) Leaves
B) Fruits
C) Stem bark
D) Roots
Ans : C) Stem bark

49. Lichens are:
A) Parasites
B) Chemoautotrophs
C) Decomposers
D) Symbiotic
Ans : D) Symbiotic

50. Which of the following food items is rich in Iron ?
A) Rice
B) Apple
C) Pulses
D) Orange
Ans : B) Apple

51. The stimulate cocaine is obtained from the leaves of:
A) Coffee plant
B) Tea plant
C) Coca
D) Rauwolfia
Ans : C) Coca

52. What is the basic classification unit of plants ?
A) Genus
B) Class
C) Order
D) Species
Ans : D) Species

53. Mahali disease affects ......................
A) Rubber
B) Paddy
C) Araca plant
D) Coconut plant
Ans : C) Araca plant

54. Plants respire through:
A) Stomata
B) Meristem
C) Anther
D) Ovary
Ans : A) Stomata

55. The first place in the world where tomato was cultivated:
A) India
B) Africa
C) South America
D) Arabia
Ans : C) South America

56. Which tissue is related to the formation of new cells?
A) Parenchyma
B) Collenchyma
C) Meristem
D) Schlerenchyma
Ans : C) Meristem

57. Woody climbers of the plants which are called:
A) Twiners
B) Lianas
C) Climbers
D) Creepers
Ans : B) Lianas

58. The hallucinogenic drug marijuana is obtained from:
A) Hemp
B) Cinchona
C) Poppy
D) Rauwolfia
Ans : A) Hemp

59. The name of the plant from which castor oil is obtained:
A) Brassica
B) Allium cepa
C) Araca catechu
D) Ricinus communis
Ans : D) Ricinus communis

60. Which is a free living bacteria that helps in nitrogen fixation in soil ?
A) Azotobacter
B) Anabaena
C) Azolla
D) Nostoc
Ans : A) Azotobacter

Plant Movements

Movements of the plants towards light-phototropism
Bending of stem towards light is due to - phototropism
Sunlight stimulate the plant movement is called - heliotropism
Movement of the plant organs in response to the force of gravity is called - geotropism
Water stimulate the plant movement is called - hydrotropism
Chemicals stimulate the plant movements is called thermotropism
Alternation of day and night causes plant movement called nyctinastic movement
Movement of mimosa is due to seismonastic movement.
The movement of an organ induced by contact with a foreign body - Haptotropism

Brain matters

Thalamus is the relay center in our brain
The human brain is made with neurons.
The brain is located in the skull called cranium.
Important parts of the brain are cerebrum,cerebellum,medulla oblongata,thalamus and hypothalamus.
The portion of brain nearest to the spinal cord is called medulla oblongata.
Medulla oblongata controls the respiration of circulation and heart beat.
Thalamus controls sensory information such as pain,temperature,pressure, and touch.
The hypothalamus also regulates pituitary hormones and menstrual cycle.
The important function of the cerebellum is the co-ordination of muscular movement .
The cerebrum is the largest part of the human brain.
Cerebellum is known as little brain.
The weight of an adult's brain is 1.3-1.4 Kg.