1. Photosynthesis:  glucose + oxygen  CO2 H2O O2 light energy + carbon
C6H12O6 O2
light
energy  +
 glucose + oxygen
carbon
dioxide
sun
+ water +
enzymes
enzymes

2. + Photosynthesis ATP CO2 2 separate processes:
1. ENERGY building reactions
collect sun’s energy
called the “light” rxns
Occur during the day time
use it to make ATP (store)
2. Glucose building reactions
use the stored ATP energy
collect CO2 from air (stomates
in the leaves) & H2O
from ground (roots)
use build glucose (Energy rich molecule – E stored in bonds
Do NOT require light
sun
ATP
H2O +
CO2
glucose

3. Photosynthesis using sun’s energy to make ATP
using CO2 & water to make glucose in chloroplasts
Glucose:
allows plants to grow
used for Respiration by the plant
stored as starch
passed along the food chain to consumers who use it for Respiration
makes a waste product
oxygen (O2) – looks like “bubbles” in water
used for Respiration

4. What do plants need to grow?
The “factory” for making energy & sugars
chloroplast
Fuels
sunlight
carbon dioxide
water
The Helpers
enzymes
Make ATP! Make sugar! I can do it all… And no one even notices!
sun
CO2
ATP
enzymes
sugars
H2O

5. Photosynthesis ADP + P ATP ENERGY building reactions
sun
Photosynthesis
Useable
energy
ENERGY building reactions
ADP + P
ATP
SUGAR building reactions
used immediately to synthesize sugars
H2O
glucose
CO2

6. chlorophyll (a pigment)
Chloroplasts
absorb sunlight
(green reflected)
Chloroplasts contain
chlorophyll (a pigment)
sun
CO2
Individual disk = thylakoid
Stack of thylakoids = grana – grana are green – absorb light – except green!!!!
ENERGY storing rxns – light reactions
Space in between grana = stroma
SUGAR building rxns - dark reactions
make ATP & glucose

7. Energy flow – need a constant supply (does NOT recycle)
sun
Energy flow – need a constant supply (does NOT recycle)
Photosynthesis
plants, protists,
some bacteria
H2O
CO2
glucose O2
animals, plants,
fungi, protists, bacteria
Cellular Respiration
Useable
energy
ATP
The Great
Carbon Cycle
ADP + P

8. Together they form the Carbon Cycle
sun
Together they form the Carbon Cycle
capture light energy
Photosynthesis
Synthesis
producers, autotrophs
H2O
CO2 O2
organic molecules (carbs, proteins, fats)
waste
waste
waste
consumers, heterotrophs
digestion
Cellular Respiration
release chemical energy
stored in bonds