Multiple Choice
Which of the following is not a type of organic chemistry reaction?
3. Acids and Bases
Organic Chemistry Reactions
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In the context of organic chemistry reactions, what is the role of water in noncyclic photophosphorylation?
A
Water functions as a catalyst in the Calvin cycle.
B
Water is used to transport protons across the thylakoid membrane.
C
Water serves as a substrate for ATP synthesis.
D
Water acts as a reducing agent, donating electrons to replace those lost by chlorophyll.
Verified step by step guidance1
Understand the process of noncyclic photophosphorylation, which occurs in the thylakoid membranes of chloroplasts during photosynthesis.
Recognize that in noncyclic photophosphorylation, light energy is used to excite electrons in chlorophyll molecules, which are then transferred through a series of proteins known as the electron transport chain.
Identify the role of water in this process: water molecules are split in a reaction known as photolysis, which occurs in the presence of light.
During photolysis, water is broken down into oxygen, protons, and electrons. The chemical equation for this process is:
Conclude that the electrons released from water are used to replace those lost by chlorophyll, thus acting as a reducing agent in the process.
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