8.3 Photosynthesis

What is the primary role of photosystem II in the light-dependent reactions of photosynthesis?

A. Production of ATP

B. Splitting of water molecules

C. Carbon fixation

D. Regeneration of RuBP

During the Calvin Cycle, what enzyme is crucial for the incorporation of CO2 into organic molecules?

A. ATP synthase

B. Rubisco

C. Chlorophyll

D. Catalase

Which part of the chloroplast is primarily involved in the light-dependent reactions of photosynthesis?

A. Stroma

B. Thylakoid membrane

C. Outer membrane

D. Inner membrane

What is the significance of the action spectrum in photosynthesis?

A. It represents the rate of photosynthesis at different light wavelengths.

B. It shows the absorption of light by chlorophyll.

C. It depicts the structure of chloroplasts.

D. It illustrates the regeneration of RuBP.

What is the primary role of NADPH in photosynthesis?

A. Splitting of water molecules

B. Providing reducing power for the Calvin Cycle

C. Absorbing light energy

D. Pumping protons across the thylakoid membrane

a) Explain the role and significance of photosystem II in the light-dependent reactions of photosynthesis. [3]

b) Describe the process of photolysis and its importance in the production of ATP and NADPH. [3]

a) Detail the steps of the Calvin Cycle and explain the role of Rubisco in carbon fixation. [4]

b) Discuss how the Calvin Cycle is cyclic and the significance of the regeneration of ribulose bisphosphate (RuBP). [2]

a) Discuss the structure and function of chloroplasts and how they are adapted to perform photosynthesis efficiently. [3]

b) Explain the concept of action spectra and absorption spectra in relation to chlorophyll and accessory pigments. [3]

a) Explain the significance of the thylakoid membrane and stroma in the photosynthetic processes. [3]

b) How does the structure of the chloroplast relate to its function in photosynthesis? [3]

c) Discuss the role of ATP in the light-dependent and light-independent reactions of photosynthesis. [2]

a) Describe the role of photosystem I in the light-dependent reactions of photosynthesis. [3]

b) How does the production of NADPH contribute to the overall process of photosynthesis? [3]

c) Explain the importance of the cyclic nature of the Calvin Cycle. [2]