Structure and Function of Chloroplasts

Thylakoid

Flattened membrane sacs for light absorption.

Chlorophyll

Green pigment that absorbs light energy.

Grana

Stacks of thylakoid membranes in chloroplasts.

Stroma

Protein-rich solution surrounding thylakoid stacks.

Chlorophyll A

Pigment that absorbs more red light.

Chlorophyll B

Pigment that absorbs more blue light.

Accessory Pigments

Pigments aiding light absorption, e.g., carotenoids.

Light Dependent Reactions

Occurs in thylakoid, converts light energy to chemical

Photosystems

Clusters of pigments that trap sunlight.

function of Light Dependent Reactions

Trap sunlight and covert to electrons , ATP and NADPH

Carotenoids

yellow, orange, and brown pigments