The The ChloroplastChloroplast

Unit 4: Energize Your LifeUnit 4: Energize Your Life

ChloroplastsChloroplasts

Chloroplasts are found in the Chloroplasts are found in the cells of plants.cells of plants.

Chloroplasts absorb light Chloroplasts absorb light energy and make food through energy and make food through photosynthesis.photosynthesis.

PhotosynthesisPhotosynthesis

Reactants: water and carbon Reactants: water and carbon dioxidedioxide

Products: glucose and oxygenProducts: glucose and oxygen6CO6CO22 + 6H + 6H22O + light O + light C C66HH1212OO6 6 + 6O+ 6O22

ChlorophyllChlorophyll Chloroplasts contain a Chloroplasts contain a

pigment called chlorophyll.pigment called chlorophyll. A pigment is a light-absorbing A pigment is a light-absorbing

molecule.molecule. Chlorophyll reflects green Chlorophyll reflects green

light and absorbs all other light and absorbs all other colors of light.colors of light.

ThylakoidsThylakoids

Chloroplasts contain sack-like Chloroplasts contain sack-like photosynthetic membranes photosynthetic membranes called called thylakoidsthylakoids. .

Thylakoids are arranged in Thylakoids are arranged in stacks called stacks called granagrana..

The light-dependent reactions The light-dependent reactions occur in the thylakoids.occur in the thylakoids.

StromaStroma

The area outside the The area outside the thylakoids is called the thylakoids is called the sstromatroma..

The light-independent The light-independent reactions occur in the stroma.reactions occur in the stroma.

The ChloroplastThe Chloroplast