ReviewReview

1.1. Name the 3 requirements for Name the 3 requirements for photosynthesis.photosynthesis.

2.2. Green plants absorb what Green plants absorb what wavelength (color) of light? wavelength (color) of light?

3.3. What pigment is found in What pigment is found in chloroplasts that helps absorb light?chloroplasts that helps absorb light?

BonusBonus What is the simplified equation for What is the simplified equation for

photosynthesis?photosynthesis?

Use the Force: Use the Force: Light and Dark Reaction of Light and Dark Reaction of

Photosynthesis!Photosynthesis!

Photosynthesis Overview

Chloroplast

H2O

O2

Sugars

CO2

Light-Dependent Reactions

CalvinCycle

NADPH

ATP

ADP + PNADP+

Chloroplast

Light

Pigments of PhotosynthesisPigments of Photosynthesis

Absorption of lightAbsorption of Light byChlorophyll a and Chlorophyll b

V B G Y O R

Chlorophyll b

Chlorophyll a

Light Energy

Chloroplast

CO2 + H2O Sugars + O2

Photosynthesis: Reactants and Products

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C h e m i c a l E q u a t i o C h e m i c a l E q u a t i o n f o r P h o t o n f o r P h o t o

s y n t h e s i ss y n t h e s i s

C h e m i c a l E q u a t i o C h e m i c a l E q u a t i o n f o r P h o t o n f o r P h o t o

s y n t h e s i ss y n t h e s i s

6 C O 6 C O 2 2 + 6 H + 6 H 2 2 OO

C 6 H 1 2 O 6 + 6 O 2

Light ReactionsLight Reactions

Needs light to occurNeeds light to occur Energy of sunlight is captured and used to Energy of sunlight is captured and used to

make energy storing compounds (batteries)make energy storing compounds (batteries) Occurs in the Occurs in the thylakoid membranethylakoid membrane of the of the

chloroplastchloroplast Membrane has pigments called Membrane has pigments called

photosystemsphotosystems (I, II) that capture light (I, II) that capture light NADPH and ATPNADPH and ATP are made are made WaterWater is broken down and is broken down and oxygenoxygen is is

releasedreleased

HydrogenIon Movement

Photosystem II

InnerThylakoidSpace

ThylakoidMembrane

Stroma

ATP synthase

Electron Transport Chain Photosystem I ATP Formation

Chloroplast

Light Dependent Reaction

Dark ReactionsDark Reactions

Can happen Can happen anytimeanytime, not only in the dark, not only in the dark Uses energy stored in ATP and NADPH to Uses energy stored in ATP and NADPH to

produce glucose produce glucose Takes place outside the thylakoid in the Takes place outside the thylakoid in the

stromastroma Calvin cycle “fixes” carbonCalvin cycle “fixes” carbon into different into different

configurationsconfigurations COCO22 is broken down and glucose is released is broken down and glucose is released

Calvin Cycle

CO2 Enters the Cycle

Energy Input

5-CarbonMoleculesRegenerated

Sugars and other compounds

6-Carbon SugarProduced

Fill in the Boxes below.Fill in the Boxes below.

What you need

What you get

Light Reactions(Light dependent)

Dark Reactions(Light independent)

light, ADP,NADP+, H2O

ATP, NADPH, CO2

ATP, NADPH, O2, H+

glucose, ADP, NADP+

Photosynthesis Overview

Chloroplast

H2O

O2

Sugars

CO2

Light-Dependent Reactions

CalvinCycle

NADPH

ATP

ADP + PNADP+

Chloroplast

Light

Photosynthesis

includes

of

take place intakes place in uses

to produce to produce

use

Light-dependentreactions

Calvin cycle

Thylakoidmembranes Stroma NADPHATPEnergy from

sunlight

ATP NADPH O2 Chloroplasts High-energysugars

Concept Map

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classworkclasswork

Work on handoutWork on handout Student led discussionStudent led discussion HWHW

SA 8-3SA 8-3