1. WKS: Photosynthesis and Cellular Respiration
GRADING RUBRIC
WKS: Photosynthesis and Cellular Respiration

2. Part 1: Label the diagram below using the following: H2O, CO2, O2, Glucose, Light-Dependent Reaction, Light-Independent Reaction, Calvin Cycle, NADP+, ADP + P, ATP, NADPH, Sunlight, grana, stroma, thylakoids
CO2
water
stroma
sunlight
NADP+
ADP + P
L.I. Reaction
L.D. Reaction
Calvin Cycle
ATP
NADPH
thylakoid
grana
C6H1206
oxygen

3. Questions:
What are three factors that affect the rate of photosynthesis?
Light
Temperature
Water
CO2 conc.

4. 2. How do plants store the excess energy they produce? Give examples
They convert it to larger polysaccharides like starch (amylose). Many plants have specialized structures to do this like a potato.

5. 3. Why do most plants appear green in color?
Because chlorophyll does not absorb green wavelengths of light (green light is reflected)

6. 4. Why do they sometimes say that the forests of our planet are the “lungs of earth”?
They exchange gases like our lungs. Forests take CO2 out of the atmosphere and produce O2.

7. Complete the table below
Photosynthesis
Function
 Convert light energy into chemical potential energy
Overall Equation
 6CO2 + 6H20 → C6H12O6 + 6O2
Reactants
 6CO2 + 6H20
Products
 C6H12O6 + 6O2
Location of Light-Dependent Reaction
 Thylakoid membrane
Location of Light-Independent Reaction
 Stroma

8. Electron Transport Chain
Part 2: Label the diagram below using the following: Electron Transport Chain, Glycolysis, Glucose, Krebs Cycle, pyruvic acid, 2, 32, 2, H2O, O2, CO2 O2
Pyruvate
Krebs Cycle
Glucose
Glycolysis
Electron Transport Chain
H2O
CO2 2 2 32

9. Complete the table below
Cellular Respiration
Function
 Convert food energy into ATP
Overall Equation
 C6H12O6 + 6O2 → 6CO2 + 6H20
Reactants
 C6H12O6 + 6O2
Products
 6CO2 + 6H20
Location of Glycolysis
Cytoplasm
Location of Cellular Respiration
Mitochondria
Starting molecule of Glycolysis
 Glucose
Starting molecule of Cellular Respiration
Pyruvate (pyruvic acid)
Number of ATP produced in Glycolysis  2
Total number of ATP produced in Glycolysis + Cellular Respiration
 36

10. 5. How are the processes of photosynthesis and cellular respiration dependent on each other?
Equations:
6CO2 + 6H20 → C6H12O6 + 6O2
C6H12O6 + 6O2 → 6CO2 + 6H20
Each makes what the other needs
Order of electron transport/cycle
Photosynthesis: electron transport → Calvin cycle
Cellular Respiration: Krebs cycle → electron transport

11. 6. What does the word “glycolysis” mean?
Glucose breaking

12. 7. What is the difference between an aerobic process and an anaerobic process?
Aerobic: requires oxygen
Anaerobic: without oxygen

13. 8. What happens after glycolysis if oxygen is present?
The products of glycolysis (pyruvic acid) continues on into the mitochondria for cellular respiration to continue making ATP

14. 9. What happens after glycolysis if oxygen is not present?
Fermentation will take place trying to make a little bit of energy in the form of ATP

15. 10. What is the purpose of fermentation?
It allows glycolysis to continue making small amounts of energy.
It gets rid of molecules that build up and eventually would stop glycolysis (NADH)

16. 11. What are the two types of fermentation and where do they occur?
Lactic acid fermentation: occurs in muscle cells
Alcoholic fermentation: anaerobic bacteria, yeast

17. 12. What does ATP stand for?
Adenosine triphosphate

18. 13. What are the three basic parts of an ATP molecule?
Adenine
Ribose
3 phosphate groups

19. 14. How does ATP release energy when it is needed in the cell?
The third phosphate bond breaks releasing energy

20. 15. How does ADP stand for?
Adenosine diphosphate

21. 16. How does an ADP molecule get “recharged” and turned back into an ATP molecule?
From the food we eat

22. 17. What is the most common type of carbon-based food molecules that are used to provide energy in living things?
Carbohydrates (then lipids)

23. 18. Why are proteins rarely broken down and used to produce energy in living things?
Proteins are broken down into their component monomers (amino acids). These are then used to make new proteins the body needs

24. 19. What type of organic compounds do plants store their excess energy?
Starch (amylose)

25. 20. What type of organic compounds do animals normally store their excess energy?
Lipids (fat) and about 20 minutes worth of glycogen