Answer to Question #214357 in Cell Biology for Moe

Question

1.6) The light phase of photosynthesis involves the activation of PS I and PS II. Describe the composition of these photosystems and the mechanisms in place used to trap light energy.

Answer 1

Photosynthesis is fundamental to all life on Earth; it is required by both plants and animals. It is the only biological mechanism capable of capturing energy from outer space (sunlight) and converting it into chemical molecules (carbohydrates) that all organisms need to fuel their metabolism.

Photosystems are functional units for photosynthesis that are characterized by specific pigment organization and association patterns. Their task is the absorption and transfer of light energy, which implies electron transfer. Photosystems are physically present in thylakoid membranes.