Chapter 4

Question 1

What are the products of Respiration? What are the reactants of photosynthesis?

Answer 1

Carbon Dioxide, water, ATP

Water, sunlight, Carbon dioxide

Question 2

Wood is a complex carbohydrate called cellulose. What product is produced by both burning wood and by chemical respiration of carbohydrates?

Answer 2

Carbon Dioxide

Question 3

Write out the equation for photosynthesis:

Answer 3

6H20 + 6CO2 —light—> C6H12O6 + 6 CO2

Question 4

In the lab what happened to the water when you added phenol red? (Very simple question, don’t overthink it!)

Answer 4

turned red

Question 5

What happened to the water solution in question 4 when you breathed into it? What caused this change

Answer 5

CO2, which is acidic when dissolved in water, changed the color of the phenol red from red to orange

Question 6

When Elodea stems were inserted into the tube of solution from question 5 what happened to that solution over time? What caused the change

Answer 6

The Elodea went through photosynthesis, which took the CO2 out of the water and turned it back to red

Question 7

You added Sodium Azide (actually, your TA did) in order to do what?

Answer 7

Sodium Azide interfered with the electron transport system, preventing aerobic respiration.

Question 8

What natural gas contributes to the process of global warming and how is it related to photosynthesis and cell respiration

Answer 8

Carbon dioxide; we need plants to take away the CO2 in the atmosphere through the process of photosynthesis

Question 9

A respirometer experiment testing the ability of yeast cells to utilize various fuels for respiration yielded the following information:

Fuel   Gas produced
Sucrose  2.2 mm
Glycerol  .08 mm
Protein   .5 mm
Based only on the above table, what is the optimum fuel for yeast?

Answer 9

sucrose

Question 10

According to the answers published on our web site what was the order of effectiveness of the respiratory fuels used to produce respiration in yeast

Answer 10

glucose, glycerol, protein

Question 11

List four substances necessary for a plant to grow

Answer 11

light, water, CO2, soil

Question 12

Differentiate between the types of respiration with regard to the following:

a. The end product of anaerobic respiration in humans
b. The end product of anaerobic respiration in yeast cells.
c. The relative amounts of ATP generated by anaerobic versus aerobic respiration.

Answer 12

a. lactic acid
b. alcohol (2 ethanol + 2 CO2)
c. anaerobic- 2
aerobic- 36

Question 13

What are the 2 most abundant “greenhouse gasses” and which one is most abundant?

Answer 13

Water vapor is most abundant, followed by CO2