PHOTOSYNTHESIS

PHOTOSYNTHESIS

1.First phenomenon in photosynthesis is-

a. Excitation of plant b. Excitation of electrons in chlorophyll molecule

c. Diffusion of oxygen in to stomata of leaves d. Photolysis of water

2. Red drop phenomenon due to the disruption of photochemical activity of

a. PS-I b. PS-1 & PS-II c. PS-II d. Carotinoids

3. In bacterial photosynthesis the hydrogen donor is

a. H2S b. NH3 c. H2O d. H2SO4

4. Supply of which of the material to an isolated chloroplast suspension would increase oxygen

evolution?

a. Water b. ATP c. NADP d. NaDPH2

5. The dark reaction of photosynthesis occur in

a. Grana lamella b. Stroma c. Stroma lamella d. Thylakoids

6. The ‘Dark reaction’ in photosynthesis is called so because it-

a. Can occur more rapidly at night b. Does not require light energy

c. Can not occur in day time d.Can not occur in shades

7. The law of limiting factor in photosynthesis was enunciated by-

a. Hill b. Calvin c. Blackman d. Kreb

8. Which one of the following would not be a limiting factor for photosynthesis?

a. O2 b. Light c. Carbon dioxide d. Chlorophyll

9. CAM photosynthesis occurs in plants with

a. Thin green leaves with reticulated veination b. Fleshy green leaves

c. Thin coloured leaves d. Thin leaves with parallel veination

10. C4 path way is met with :

a. Corn b. Potato c. Mustard d. Water hyacinth

11. Which of the following is least effective in photosynthesis?

a. Green light b. Red light c. Sunlight d. Blue light

12. Thylakoids of grana possess enzymes of-

a. Kreb’s cycle b. C3 path way c. C4 path way d. Photophosphorylation

13. Chemical process of photosynthesis was revealed by-

a. Calvin b. Blackman c. Hill d. Arnon

14. The ultimate biological energy comes from-

a. Mitochondria b. Sunlight c. Glucose d. ATP

15. Discovery of ‘Emerson effect’ has shown the existence of-

a. Light and dark reactions in photosynthesis b. Two distinct photochemical reactions

c. Poto-respiration d. Photo-phosphorylation

16. The oxygen released during photosynthesis comes from water was proved by-

a. Robert Mayer b. Blackman c. Ruben d. Calvin

17. Alge used by Calvin and his co-workers in their experiment was-

a. Chlamydomonas b. Chlorella c. Chara d. Euglena

18. Starch containing plastids are called

a. Amyloplast b. Leucoplast c. Chloroplast d. Chromoplast

19. Chlorophyll-b is present in-

a. Prokaryotes b. Eukaryotes c. Both prokaryotes & eukaryotes d. Bacteria

20. Glycolate accumulation in chloroplast takes place during

a. Low temperature b. Low CO2 c. Bright illumination d. High CO2

21. Photosynthesis is an oxido-reduction process. The material that is oxidized:

a. CO2 b. NADP c. H2O d. PGA

22. Synthesis of fructose in C4 path away occurs in the chloroplast of-

a. Spongy mesophyll b. Bundle sheath c. Guard cells d. Epidermis

23. The function of ATP in photosynthesis is the transfer of energy from-

a. Dark reaction to light reaction b. Light reaction to dark reaction

c. Chloroplast to mitochondria d. Mitochondria to chloroplast

24. In chlorophyll molecule Mg is situated in

a. Centre of porphyrin b. Comers of porphyrin c. Phytol chain d. Isocyclic ring

25. Photolysis of water in photosynthesis is associated with-

a. Cytochrome b6 b. Pigment system-I c. Pigment system -II d. Plastocyanin

ANSWERS

1.b 2.c 3.a 4.c 5.b 6.b 7.c 8.a 9.b 10.a 11.d & a 12.d 13.a 14.b 15.b 16.c

17.b 18.a 19.b 20.c 21.c 22.b 23.b 24.a 25.c