Photosynthesis &

Cellular Respiration

The process by which energy from the sun is used to

convert carbon dioxide and water into glucose and

oxygen

Photosynthesis

Photosynthesis Con’t

• Photosynthesis occurs in algae, certain types of prokaryotes, and the chloroplasts of eukaryotic plants

• Structure and shape of a leaf is adapted for photosynthesis

Leaves are flat, only a few cells thick, and expose a large surface area to the sun

CO2 from air enters leaf via adjustable pores, stomata, in epidermis

Chemical Equation of Photosynthesis

6CO2 + 6H2O + Energy C6H12O6 + 6O2

(Light)

The process by which the stored energy in glucose molecules is broken down to release ATP.

Cellular Respiration

Chemical Equation of Cellular Respiration

C6H12O6 + 6O2 6CO2 + 6H2O + Energy(ATP)

Cellular Respiration Con’t

Cellular respiration occurs in all eukaryotic organisms

Begins in the cytoplasm, but is completed in the mitochondria

Produces ATP for the cell Remember ATP is the only usable form of energy for

the cell

Cellular Respiration is NOT:

Breathing

Exchange of gases with the atmosphere

The transport of oxygen and carbon dioxide to/from the cell.

Types of Cellular respiration

Aerobic Requires oxygen in

order to take place This process produces

more energy

Anaerobic Does not require

oxygen to take place Simple process that

produces energy quickly

Comparing Photosynthesis and Cellular Respiration

Photosynthesis Requires energy Uses enzymes Uses ETC Gives off oxygen as

waste Requires carbon

dioxide and water Occurs in the

chloroplast

Respiration Requires energy Uses enzymes Uses ETC Requires oxygen to

breakdown sugars Gives off carbon

dioxide and water as waste

Occurs in the cytoplasm and the mitochondria.