4. Which statement about carbohydrate biosynthesis during the Calvin cycle react

Question

4. Which statement about carbohydrate biosynthesis during the Calvin cycle reactions is NOT TRUE? A) Rubisco is an enzyme required for CO2 fixation. B) NADPH is the source of electrons for carbohydrate biosynthesis C) ATP is the energy source for carbohydrate biosynthesis D) Reactions occur in the photosynthetic membranes of the chloroplast E) Oxygen is not required 5. The overall source of energy for photosynthesis is: A) Energy released from the glycolytic breakdown of glucose B) Energy released from the hydrolysis of ATP Light energy from the sun D) Energy released from the splitting of water to produce oxygen E) None of the above 6. What is another name for the light-independent reactions? 7. In what part of the chloroplast do the light-dependent reaction occur? 8. In what part of the chloroplast do the light-independent reaction occur? 9. Name the embedded protein complex found in the chloroplast that uses excited electrons to reduce NADP" to NAPDH. 10. Name the embedded protein complex found in the chloroplast that converts ADP to ATP using free energy from the flow of hydrogen ions. 11. How many CO2 molecules are used in one turn of the light-independent reactions? 12. How many total carbon atoms leave the cycle of light-independent reactions before the regeneration phase? 13. Where do ADP and NADP go after they are used in the light-independent reactions?

Explanation / Answer

4. Calvin cycle occur in the stomach of the chloroplast. Hence, incorrect statement is option d.

5. The overall source of photosynthesis is sunlight .The sunlight is converted into chemical energy. Hence, option c is correct.

6. Another name of light independent reaction is dark reaction.

7. Light dependent reaction occur in thylakoids.

8. Light independent reaction occur in stroma.

9. Photo system I

10 . PSI and PSII

11. 1 carbon dioxide is used.

13. They go to stroma of the chloroplast where light independent reaction are occurring.

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