CHAPTER 13. PHOTOSYNTHESIS
KEY TERMS:
Photosynthesis, photolysis, PAR, Action Spectrum, Photophosphorylation, Photosystems, PS I, PS II, LHC, Reaction centre, RUBISCO, RUBP, Light Reaction Dark Reaction, C3 cycle, Calvin cycle, Carboxylation, C4 Cycle, CAM, Photorespiration, Cranz Anatomy, Bundle sheath Cells, NADPH, Fo-F1 Particles, Chemiosmotic hypothesis,
BIO XI 4.3.1
Q.1. Differentiate the following:
(a) Light reaction and dark reaction.
(b) Photosystem I and Photosystem II
Q. 2. Draw the following;
(a) Cyclic Photophosphorylation.
(b) Noncyclic Photophosphorylation.
(c) C3 cycle or Calvin Cycle
(d) C4 cycle or Hatch Slack Cycle
Q. 3. Where does chlorophyll absorb light in the visible spectrum?
Q. 4. What is meant by photolysis of water in photosynthesis?
Q. 5. Name the reaction centres of photosystem I & II.
BIO XI 4.3.2
Q. 6. Where does light and dark reactions take place within a chloroplast.
Q. 7. Expand RUBP, PAR, NADP, PEP, RUBISCO.
Q. 8. Name two C4 plants, C3 plants.
Q.9. Where is PS I located in the chloroplast?
Q.10. Mention one useful role of photorespiration to plants.
BIO XI 4.3.3
Q. 11. Name the cell organelles which are involved in photorespiration?
Q. 12. Differentiate between action spectrum & Absorption spectrum.
Q. 13. Bring out any five differences between cyclic & non- cyclic photphosphorylation.
Q. 14. With the help of a diagram show the synthesis of ATP through chemosynthesis.
Q.15. Mention briefly in points the three processes which lead to the establishment of proton gradient across the thylakoid membrane.
BIO XI 4.3.4
Q. 16. State the law of limiting factors. Who proposed this for photosynthesis?
Q. 17. Specify how C4 photosynthetic pathway increases carbon di oxide concentration in bundle sheath cells of sugar cane.
Q. 18. Write any four differences between
(i).C3 plants & C4 plants.
(ii) anatomy of leaf in C3 & C4 plants.
(iii) Chloroplasts of Bundle Sheath Cells and Mesophyll cells in C4 plants.
Q. 19. What is the important function of carotenoid other than absorbing light energy?
Q.20 Make a list of various factors affecting rate of photosynthesis photosynthesis.
Q.21. How many ATPs and NADPHs are required to produced one molecule of glucose through C3 pathway?
Competition Point (Optional):
Q. Who proposed chemiosmotic theory of ATP synthesis.
Q. Briefly describe the structure of ATPase or F1-F0 complex.
Q. Describe chemiosmotic theory of ATP synthesis.
Q. What is CO2 fertilisation effect.
Q. What do you mean by CO2 Compensation point?
Q. Explain the reason why C4 plants are more efficient in tropical regions than C3 plants.
Q. Draw metabolic pathway of photorespiration in C3 plants.
Q. What do you mean by CAM pathway? Draw this pathway and mention its advantage to desert plants.
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