Photosynthesis

MT: Cytology

I will understand the process of photosynthesis.

What organisms go through photosynthesis?

Producers/autotrophs, such as plants, trees, algae, some bacteria

Where does photosynthesis take place?

In the chloroplasts of plant cells found in the leaves!

Chloroplasts have chlorophyll

Chlorophyll is a green pigment that reacts to sunlight by transferring energy to e- (electrons)

Makes chloroplasts and plants look green

Reflect green light waves from the sun

Granum

Singlethylakoid

Stroma (fluid)

Photosynthesis

Process that uses the energy of sunlight to convert water and carbon dioxide into sugars (glucose) and oxygen.

If you were making a cake, what would the…

Reactants be?floureggssugarwater etc

Product be?a cake!

Photosynthesis Eqn:

Sunlight + 6CO2 + 6H2O = C6H12O6 + 6O2

carbon dioxide

water sugar (glucose) oxygen

Photosynthesis Eqn:

6CO2 + 6H2O = C6H12O6 + 6O2

carbon dioxide

water sugar (glucose) oxygen

Reactants

“what is used”

Products

“what is made”

Where does the energy for the reactions in photosynthesis come from?

e- from chlorophyll, charged by sunlight

NADPH and ATP formed in LD reaction

Photosynthesis

Light-Dependent Reaction Light-Independent Reaction AKA Calvin Cycle

- sunlight is required

- O2 is produced from water

- e- (light energy) fuel the reactions

-sunlight is NOT required

-Glucose is produced from CO2

Factors that affect photosynthesis

1. Water – needed to start the LD reaction

2. Temperature – proteins work best between 0-35 degrees Celcius

3. Light – need light to excite e- in chlorophyll

Photosynthesis Song

http://www.youtube.com/watch?v=4s8x1KLMzL0