Objective: You will be able to compare and contrast the photosynthesis and respiration equations.Do Now:• Read p. 221• What is the most important use of food?

Photosynthesis Equation6CO2 + 6H2O C6H12O6 + 6O2

Respiration Equation

C6H12O6 + 6O2 6CO2 + 6H2O

Comparison

• Compare the equations for photosynthesis and respiration

• How can you remember the equation for photosynthesis?

• How can you remember the equation for respiration?

Global Warming

• Is partly caused by an increase of CO2 in the air?

• Why would cutting down a forest and leaving the trees to rot increase the effect of global warming?

Create your own lab day!

Bromthymol

• Used to test for the presence of carbon dioxide (CO2)

• If CO2 is present it is a yellow color

• If CO2 is NOT present it is a blue color

How does exercise affect the disposal of CO2?

• What is the independent variable?• What is the dependent variable?• Design your experiment

– Write a hypothesis– How would you test for CO2?– List the procedure– List the materials you will need

ATP Contain three phosphate groups Have energy between phosphate bonds ATP supplies energy by breaking the

bonds between phosphates Energy is used to carry out chemical

reactions The bonds are restored by respiration

Figure 6.10 The ATP cycle

The Structure of ATP• ATP (adenosine triphosphate)

– Is the cell’s energy– Provides energy for cellular functions

Figure 8.8

O O O O CH2

H

OH OH

H

N

H H

ON C

HC

N CC

N

NH2Adenine

RibosePhosphate groups

O

O O

O

O

O

-- - -

CH

Review

Respiration Equation

C6H12O6 + 6O2 6CO2 + 6H2O + 36ATP

Breaking down glucose with oxygen allows us to make 36 ATP

Anaerobic respiration

• Occurs without oxygen• Only makes 2 ATP• Also called fermentation

Anaerobic respiration in humans

• When we can’t get enough oxygen to our muscles, they become fatigued.

• We then have to do respiration without using oxygen

C6H12O6 Lactic acid + 2ATP

Anaerobic respiration in yeast

• Produces alcohol and CO2

C6H12O6 Alcohol + CO2 +2 ATP