PHOTOSYNTHESIS NOTES
PHOTOSYNTHESIS- is the process of changing light energy into chemical energy. The pigment
chlorophyll which is found inside the chloroplasts of a plant cell can capture the light energy and store it in
food. This pigment looks like the color green to our eyes. The chemical process of photosynthesis uses the
energy from the sun combined with water from rain and carbon
sugar (called glucose) and also give off oxygen.
chains.
dioxide from the air to make a
Photosynthesis is the basis for all food webs and food
The following is the chemical equation for photosynthesis.
Photosynthesis: record the equation then tell what the symbols stand for
Reactants
6 H2O
+
6 CO2
Products
sunlight
+
In this equation:
CO2 Stands for carbon

C6H12O6
+
6 O2
dioxide
H2O stands for water
O2 Stands for oxygen
C6H12O6Stands for glucose
(sugar)
ONLY PLANT CELLS WITH CHLOROPLASTS DO PHOTOSYNTHESIS
CELLULAR RESPIRATION NOTES
CELLULAR RESPIRATION: a process where food molecules are broken down to release energy. When
the energy is released water and carbon
dioxide are given off as waste.
Cellular respiration is done by
the mitochondria in both plant and animal cells. To do cellular respiration these organelles need to use
sugar from food and oxygen from the air to make energy.
Cellular Respiration must be performed
constantly to give the living organism a continuous supply of energy.
Aerobic respiration uses oxygen to break down glucose (sugar) molecules into carbon dioxide, water and
ATP. ATP is one form of energy. Aerobic Respiration uses the following formula:
Reactants
C6H12O6
+
Products
6 O2

In this equation:
C6H12O6Stands for glucose
6 H2O
+
6 CO2
+
ATP
(sugar)
O2 Stands for oxygen
CO2 Stands for carbon
dioxide
H2O stands for water
ANY CELL WITH MITOCHONDRIA CAN DO CELLULAR RESPIRATION!
The chemical equation for photosynthesis is the opposite of the equation for aerobic cellular respiration
Anaerobic Respiration is also called fermentation. It is the breakdown of glucose (sugar) molecules into
carbon dioxide, alcohol, and ATP. Anaerobic respiration DOES NOT use oxygen. This happens during
strenuous exercise when your body is not getting enough oxygen. Lactic acid is released and builds up in the
muscles and causes cramps and a burning sensation. Less energy is released in this type of respiration.
This figure shows the carbon-oxygen cycle and the way chloroplasts and mitochondria work together in this
cycle. Label the names of the organelles and what the chemicals coming out of the organelles are.