Cellular Respiration and Photosynthesis

Cellular Respiration and Photosynthesis

Warm up Warm up

• What is the purpose of the mitochondria and chloroplasts in cells?

• What is the purpose of the mitochondria and chloroplasts in cells?

If you were preparing for a marathon, which of these would you need to take in

the most?

If you were preparing for a marathon, which of these would you need to take in

the most?• Oxygen• Sunlight• Carbon dioxide• food

• Oxygen• Sunlight• Carbon dioxide• food

ODIPODIP

All cells use cellular respiration

All cells use cellular respiration

• Breaks down macromolecules (carbohydrates and lipids) to make energy for the cell

• ATP (Adenosine Triphosphate) = energy in the cell

• Energy is released when a phosphate bond is broken

• Breaks down macromolecules (carbohydrates and lipids) to make energy for the cell

• ATP (Adenosine Triphosphate) = energy in the cell

• Energy is released when a phosphate bond is broken

Adenine

Ribose sugar

Phosphate groups

Cellular RespirationCellular Respiration

C6H12O6 + 6O2 6CO2 + 6H2O + ATP

(glucose) (carbon dioxide)

C6H12O6 + 6O2 6CO2 + 6H2O + ATP

(glucose) (carbon dioxide)

(oxygen) (water)

3 Phases3 Phases

• Glycolysis• Kreb’s Cycle• Electron transport chain (ETC)

• Glycolysis• Kreb’s Cycle• Electron transport chain (ETC)

Where respiration occursWhere respiration occurs

Glycolysis occurs in the cytoplasm

Glycolysis occurs in the cytoplasm

Krebs Cycle and ETC occur in the mitochondria

Krebs Cycle and ETC occur in the mitochondria

Making EnergyMaking Energy

Glycolysis• Breaks down

glucose• Makes 2 ATP per

glucose molecule• Doesn’t need

oxygen

Glycolysis• Breaks down

glucose• Makes 2 ATP per

glucose molecule• Doesn’t need

oxygen

Kreb’s Cycle and ETC• Continue the

breakdown of glucose

• Makes 34 ATP per glucose molecule

• Needs oxygen

Kreb’s Cycle and ETC• Continue the

breakdown of glucose

• Makes 34 ATP per glucose molecule

• Needs oxygen

The Mitochondrion is the power station of the cellThe Mitochondrion is the power station of the cell

•Only found in eukaryotic cells

•Made of 2 membranes (inner and outer membrane)

•Has its own DNA!

One = mitochondrion, more than one = mitochondria

What happens if you don’t have mitochondria?

What happens if you don’t have mitochondria?

• You can only do glycolysis• You can only do glycolysis

What happens if there isn’t any oxygen?

What happens if there isn’t any oxygen?

Fermentation: a process that occurs in the absence of oxygen, produces alcohol or lactic acid (causes cramping in muscles)

Aerobic: oxygen presentAnaerobic: oxygen absent

Still does glycolysis, but no Krebs or ETC

Fermentation: a process that occurs in the absence of oxygen, produces alcohol or lactic acid (causes cramping in muscles)

Aerobic: oxygen presentAnaerobic: oxygen absent

Still does glycolysis, but no Krebs or ETC