KERALA PSC EXAM SCIENCE QUESTIONS AND ANSWERS
Botany
1. The tendency of plants to grow towards light:
(a) Geotropism
(b) Phototropism
(c) Chemotropism
(d) None of these
2. The reproductory organ of Plants:
(a) Root
(b) Leaf
(c) Stem
(d) Flower
3. The pigment imparts yellow colour to flowers:
(a) Xanthophyll
(b) Anthocyanin
(c) Betacyanin
(d) Haemoglobin
4. Hormone that helps for flowering in plants:
(a) Auxin
(b) Cytokine
(c) Ethylene
(d) Florigin
5. Who discovered cell?
(a) Robert Hook
(b) JC Bose
(c) Galeileo
(d) None of these
6. The plant cell wall is made up of:
(a) Chitin
(b) Cellulose
(c) Keratin
(d) Fibrin
7. Who discovered that plant body is made up of cells?
(a) M.J.Shleiden
(b) Theodore Swan
(c) Robert Hook
(d) None of these
8. What is known as the power house of the cell?
(a) Ribosome
(b) Lysosome
(c) Mitochondria
(d) Nucleus
9. The colour of chloroplast:
(a) Red
(b) White
(c) Blue
(d) Green
10. The metal present in chlorophyll:
(a) Calcium
(b) Zinc
(c) Magnisium
(d) Potassium
11. The tendency of plants to grow towards the direction of gravitational force:
(a) Geotropism
(b) Phototropism
(c) Chemotropism
(d) None of these
12. The rate of photosynthesis is highest in ..... light:
(a) Yellow
(b) Blue
(c) Green
(d) Red
13. The rate of photosynthesis is slowest in ..... light:
(a) Yellow
(b) Green
(c) Blue
(d) Red
14. Who discovered that animal body is made up of cells?
(a) M.J.Schleiden
(b) Theodore Schwan
(c) Robert Hook
(d) None of these
15. The hormone that is helpful for ripening of fruits:
(a) Auxin
(b) Cytokine
(c) Ethylene
(d) Florigin
16. Who proved that plants are living organisms?
(a) JC Bose
(b) M.J.Schleiden
(c) Robert Hook
(d) Theodore Schwan
17. The crop that depends rain for pollination:
(a) Pepper
(b) Cardomom
(c) Paddy
(d) Wheat
18. The organelle responsible for the maintenance of
the structure of cell?
(a) Nucleus
(b) Endoplasmicreticulum
(c) Mitochondria
(d) Vacoule
19. What are known as the ‘suicidal bags of the cell’?
(a) Mitochondria
(b) Vacoule
(c) Nucleus
(d) Lysosome
20. The plant with only one leaf:
(a) Colocasia
(b) Amorphophalus
(c) Plantain
(d) Vanda
Answers
1 (b) 2(d) 3 (a) 4 (d) 5(a) 6(b) 7(a) 8(c) 9(d) 10(c) 11(a)
12(b) 13(b) 14(b) 15(c) 16(a) 17(a) 18(b) 19(d) 20(b)
