The Cell’s Energy
(1)
Photosynthesis
• Only Plants and
some Bacteria
• Makes sugar
using sun’s
energy
• Happens in
chloroplasts by the
chemical chlorophyll.
Photosynthesis
H2O
Water
+
CO2
C6H12O6
Carbon
Dioxide
Glucose
Chloroplast
+
O2
Oxygen
(2)
Cellular Respiration
• Happens in MOST cells
• Cells break down sugar
to make ATP
• Occurs in Mitochondria
Cellular Respiration
C6H12O6
Glucose
+
O2
Oxygen
Mitochondria
H2O + CO2 + ATP
Water Carbon
Dioxide
(3)
Fermentation
• Can happen in many
cells
• Makes ATP by
breaking down sugar
• Not the most efficient
way
• Makes lactic acid or
alcohol as a result
Fermentation
C6H12O6
Glucose
ATP +
Mitochondria
Lactic
Acid
OR
Alcohol