The Chlorophyll a Molecules in the Reaction Center of a Photosystem

question 28

Multiple Choice

The chlorophyll a molecules in the reaction center of a photosystem participate directly in the capture of solar energy. What is the purpose of the accessory pigments?

• A) They participate in the Calvin cycle.
• B) They funnel solar energy to chlorophyll a in the reaction center.
• C) They split the water molecule to supply electrons to the chlorophyll a in the reaction center.
• D) They change the color of the leaves to discourage predators.
• E) They have no purpose.

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Definitions:

Stomata

Small openings on the surface of plant leaves and stems that allow for gas exchange between the environment and the plant's internal tissues.

Temporal Mechanisms

Processes or systems that operate over time to regulate biological or physical events in a chronological manner.

Photosynthetic

The process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and releasing oxygen.

Guard Cells

Specialized cells in the epidermis of leaves and stems that regulate the opening and closing of stomata, controlling gas exchange and water loss.