Why is the amount of gas you measured only an estimate of the ATP produced? Consider what you know about liquids and gases. How can you change the setup to make it more accurate?

Data

 

Activity 1

 

Data Table 1

 

Sugar	Initial	15	30	45	60	Total
Glucose
Sucrose
Lactose

 

Data Table 2

 

Sugar	mL CO2/(g*hr)	Moles CO2/(g*hr)	Moles ATP/(g*hr)
Glucose
Sucrose
Lactose

 

 

 

Activity 2

 

Data Table 3

 

Sugar	Initial	15	30	45	60	Total
Sucrose
Starch
Cellulose

 

Data Table 4

 

Sugar	mL CO2/(g*hr)	Moles CO2/(g*hr)	Moles ATP/(g*hr)
Sucrose
Starch
Cellulose

 

 

1. Why are starch and cellulose used in this experiment?

 

2. During this experiment, one sugar produced the most gas. Explain why.

 

3. During the experimental setup, baby oil was layered on top of the yeast-sugar mixture. Explain why.

 

4. Why is it important to keep the temperature at 35°C for this experiment?

 

5. Why is the amount of gas you measured only an estimate of the ATP produced? Consider what you know about liquids and gases. How can you change the setup to make it more accurate?
6. What would happen if all gas was removed from the water before the experiment? Would the experiment be more, or less accurate?