Question

question 35 (2 points)
water is a critical component of biochemical processes, since the reactions are aqueous. how does water hold a special role in photosynthesis?
question 36 (1 point)
what is photophosphorylation?
question 37 (2 points)
why might rubisco be considered the most important enzyme on earth?
question 38 (7 points)
identify the labelled structures (a to g) in the diagram of the three cycles of the light independent reactions of photosynthesis. include the number of molecules for a, b, c, e and f only.

Explanation:

Question 35: In photosynthesis, water is the source of electrons for the light - dependent reactions. When water is split (photolysis), oxygen is released as a by - product and electrons are made available to replace those lost from chlorophyll. This process is crucial for the generation of ATP and NADPH.
Question 36: Photophosphorylation is the process in which light energy is used to convert ADP (adenosine diphosphate) and inorganic phosphate (Pi) into ATP (adenosine triphosphate) during the light - dependent reactions of photosynthesis. It occurs in the thylakoid membranes of chloroplasts and can be either cyclic or non - cyclic.
Question 37: Rubisco (ribulose - 1,5 - bisphosphate carboxylase/oxygenase) is considered the most important enzyme on earth because it catalyzes the first major step of carbon fixation in the Calvin cycle of photosynthesis. It incorporates carbon dioxide into an organic molecule, which is the basis for the synthesis of all organic compounds in plants and forms the foundation of the food chain.
Question 38: Since no diagram is provided, a specific answer cannot be given. However, in the light - independent reactions (Calvin cycle) of photosynthesis, common molecules include ribulose - 1,5 - bisphosphate (RuBP), 3 - phosphoglycerate (3 - PGA), glyceraldehyde - 3 - phosphate (G3P), etc. The number of molecules involved in different steps of the cycle varies depending on the stage of the cycle and the input of carbon dioxide.

Answer:

Question 35: Water is the electron donor in the light - dependent reactions, and its photolysis releases oxygen and supplies electrons to replace those lost from chlorophyll, facilitating ATP and NADPH production.
Question 36: The process of using light energy to convert ADP and Pi into ATP during the light - dependent reactions of photosynthesis in the thylakoid membranes of chloroplasts.
Question 37: It catalyzes the first major step of carbon fixation in the Calvin cycle, incorporating carbon dioxide into an organic molecule, which is fundamental for plant - based organic compound synthesis and the food chain.
Question 38: No answer due to lack of diagram.