Photosynthesis in Higher Plants

Topics in this chapter

• Light Reactions and Photosystems
• Chemiosmosis and ATP Formation
• Calvin Cycle and C3 Fixation
• C4 Pathway and Kranz Anatomy
• Photorespiration and C2 Cycle
• Factors and Experiments in Photosynthesis

Cheat sheet

Practice questions

1. Question 1Q-94F48E

   Which of the following pigments acts as the primary photosynthetic pigment in higher plants?

   1. A.Chlorophyll b
   2. B.Chlorophyll a
   3. C.Carotenoid
   4. D.Xanthophyll
   See the answer and solution
2. Question 2Q-8D540D

   Electrons released from photosystem II during non-cyclic photophosphorylation are replaced by electrons derived from:

   1. A.Carbon dioxide
   2. B.NADPH
   3. C.Water
   4. D.ATP
   See the answer and solution
3. Question 3Q-76F077

   During the Calvin cycle, the primary acceptor of carbon dioxide is a:

   1. A.3-carbon ketose sugar
   2. B.5-carbon ketose sugar
   3. C.4-carbon aldose sugar
   4. D.2-carbon organic acid
   See the answer and solution
4. Question 4Q-B16B0C

   C4 plants are specially adapted to photosynthesize efficiently under conditions of:

   1. A.Low light intensity and low temperature
   2. B.High temperature, high light intensity, and low water availability
   3. C.High humidity and submerged conditions
   4. D.Constant shade and high CO2 concentration
   See the answer and solution
5. Question 5Q-307D66

   Chemiosmotic hypothesis explains ATP synthesis in chloroplasts. Which of the following conditions is necessary for ATP formation across the thylakoid membrane?

   1. A.Higher proton concentration in the stroma compared to the lumen
   2. B.A proton gradient with high concentration in the thylakoid lumen
   3. C.Equal concentration of protons in stroma and lumen
   4. D.Breakdown of the thylakoid membrane to allow free diffusion
   See the answer and solution