Photosynthesis
Tuesday, April 8, 14
Tuesday, April 8, 14
Photosynthesis
Tuesday, April 8, 14
Photosynthesis
Where does the energy come from that sustains all life?
Tuesday, April 8, 14
Photosynthesis
Where does the energy come from that sustains all life?
The Sun!!
Tuesday, April 8, 14
Tuesday, April 8, 14
I. Photosynthesis
A. Using sunlight to make glucose (sugar)
B. Happens in the chloroplast
CHLOROPLAST
Tuesday, April 8, 14
Chlorophyll
C. Water, carbon dioxide and sunlight enter
1. Chlorophyll (green pigment) captures the sunlight
2. CO2 enters through the stomata
(openings in the leaf)
3. water enters through the roots
Tuesday, April 8, 14
D. Glucose and oxygen are produced
1. Glucose is the plant’s food
2. O2 is released through the
stomata since it is not needed.
Tuesday, April 8, 14
E. Equation for photosynthesis:
6CO2 + 6H2O + sunlight  C6H12O6 + 6O2
.
Tuesday, April 8, 14
Tracking Atoms in Photosynthesis…
Reactants
6 CO2
Products
C6H12O6
Tuesday, April 8, 14
6 H 2O
6O2
Tracking Atoms in Photosynthesis…
Reactants
6 CO2
Products
C6H12O6
Tuesday, April 8, 14
6 H 2O
6O2
Tracking Atoms in Photosynthesis…
Reactants
6 CO2
Products
C6H12O6
Tuesday, April 8, 14
6 H 2O
6O2
Tracking Atoms in Photosynthesis…
Reactants
6 CO2
Products
C6H12O6
Tuesday, April 8, 14
6 H 2O
6O2
Tracking Atoms in Photosynthesis…
Reactants
6 CO2
Products
C6H12O6
Tuesday, April 8, 14
6 H 2O
6O2
roots
Tuesday, April 8, 14
leaf
roots
Tuesday, April 8, 14
leaf
stomata
roots
Tuesday, April 8, 14
leaf
stomata
roots
roots
Tuesday, April 8, 14
sunlight
leaf
stomata
roots
roots
Tuesday, April 8, 14
sunlight
leaf
carbon
dioxide
stomata
roots
roots
Tuesday, April 8, 14
sunlight
leaf
carbon
dioxide
water
Tuesday, April 8, 14
stomata
roots
roots
sunlight
leaf
oxygen
carbon
dioxide
water
Tuesday, April 8, 14
stomata
roots
roots
sunlight
carbon
dioxide
water
Tuesday, April 8, 14
leaf
glucose
roots
roots
oxygen
stomata
sunlight
carbon
dioxide
water
Tuesday, April 8, 14
leaf
glucose
roots
roots
oxygen
stomata
sunlight
carbon
dioxide
water
Tuesday, April 8, 14
leaf
glucose
roots
roots
oxygen
stomata
sunlight
carbon
dioxide
water
leaf
glucose
oxygen
stomata
roots
roots
Chloroplast
Tuesday, April 8, 14
sunlight
carbon
dioxide
water
leaf
glucose
roots
roots
oxygen
stomata
Chlorophyll
Chloroplast
Tuesday, April 8, 14
Storing and Releasing Energy
This is called Cellular Respiration
Tuesday, April 8, 14
Storing and Releasing Energy
• During photosynthesis, plants capture
energy from sunlight and “save” it in
the form of sugar.
This is called Cellular Respiration
Tuesday, April 8, 14
Storing and Releasing Energy
• During photosynthesis, plants capture
energy from sunlight and “save” it in
the form of sugar.
• When the cells need energy they
“withdraw” it by breaking down the
sugar to make ATP
This is called Cellular Respiration
Tuesday, April 8, 14
I. Cellular respiration
A. Breaking down glucose to make ATP
for the cell
B. Happens in the mitochondria
mitochondria
Tuesday, April 8, 14
C. Glucose and oxygen enter
1. Animals
a. glucose is eaten
b. oxygen is inhaled (breath)
2. Plants
a. make their own glucose
b. oxygen enters through the
Tuesday, April 8, 14
D. ATP is made for the cell
E. CO2 and water are released as waste
ATP
Tuesday, April 8, 14
F. Equation:
C6H12O6 + 6O2  6CO2 + 6H2O + ATP
Glucose
oxygen
carbon water energy
dioxide
ATP
Tuesday, April 8, 14
Overview
photosynthesis
sunlight--> glucose
chloroplast
Tuesday, April 8, 14
respiration
glucose --> ATP
mitochondria