Download Photosynthesis

Part 1:
Equation
Reactants
Products
Endergonic or exergonic
Energy Source Used
Cell Organelles
Role of ATP
Photosynthesis
6CO2 + 6H2O + Energy →
C6H12O6 + 6O2
Carbon Dioxide, Water,
Energy
Glucose, Oxygen
Endergonic
Light Energy
Chloroplasts
Reduce carbon dioxide to
glucose
Cellular Respiration
C6H12O6 + 6O2→ 6CO2 +
6H2O + Energy
Glucose, Oxygen
Carbon Dioxide, Water,
Energy
Exergonic
ATP
Mitochondria
Energy in glucose is
transferred to ATP to
supply cells with energy
Part 2:
Photoautotrophs use photosynthesis to produce glucose. Plants, algae, and some bacteria
are examples.
Aerobic organisms use aerobic cellular respiration to break down glucose to produce
ATP. Examples are animals, bacteria, protists, fungi, and plants.
Cells can still meet their energy needs when there is no oxygen through fermentation.
Glycolysis requires NAD+ since no oxygen is available. The electrons from NADH are
added to pyruvate to either produce alcohol (in plants and yeast) or lactate (in animals
and bacteria). That produces NAD+ from which glucose can be broken down to make
ATP. This is useful during strenuous exercise. During exercise, oxygen is used up
resulting in anaerobic conditions. Fermentation allows ATP energy to still be produced
in the absence of oxygen.
Enzymes are substances that speed up chemical reactions. Reactions with enzymes can
occur up to 10 billion times faster than without. Enzymes also significantly reduce the
amount of activation energy that is required for a reaction when present.
Gregory, Michael. n/d. Energy and Enzymes. Retrieved February 24, 2009 from
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%2
0101%20Lectures/Energy/energy.htm
Gregory, Michael. n/d. Cellular Respiration. Retrieved February 24, 2009 from
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%2
0101%20Lectures/Cellular%20Respiration/cellular.htm
Gregory, Michael. n/d. Photosynthesis. Retrieved February 24, 2009 from
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%20101%
20Lectures/Photosynthesis/photosyn.htm