The amazing….

Plants& other chlorophyll bearing organisms cyanobacteriaare the most amazing living things. They can

capture solar energy and transform it into energy-rich compounds that can be used by living organisms. The process is called photosynthesis.

The Basic Requirements of Photosynthesis and Its General Reactions

Chlorophyll

Carbon dioxide

+ water

Solar energy

chlorophyll

sugar

oxygen

trap solar energy

The leaves of a plant are the primary organs ofphotosynthesis.

Inside a leaf cell, there are green structures called chloroplasts.

Hydrilla leaf cells

Photosynthetic activity takesplace inside the chloroplasts. A series of reactions occur in which solar energy is converted into chemical energy.

Parts of a Chloroplast

outer membraneinner membrane

stroma

thylakoidgranum

There are two major events that occur during photosynthesis

Light reaction which occursat the thylakoid membranes in the presence of sunlight.

Dark reaction occursat the stroma (semi-fluid matrix within the chloroplsts.)

The light reaction

Sunlight isabsorbed in thethylakoid membranes.

e-

High-energy electron are produced.

ADP NADP+

Some e+ are passed to NADPH+ converting to NADPH.

ATP

NADPH

Dark reaction

CO2H2O

glucose

NADP+

ADP