Name __________________________________ Date __________________________ Period _____
1. What is ATP?
An energy storing molecule that stores potential energy
2. Describe how ATP is like a loaded spring.
All the phosphates have a negative charge and they are repelling each other.
3. Does ATP store energy as kinetic energy or potential? Why?
Potential energy. It is chemical.
4. Define enzyme.
A protein catalyst
5. What is photosynthesis’s main goal?
Produce sugars
6. What is the equation for photosynthesis?
6CO2 + 6CO2 (In the presence of sunlight) ----- C6H12O6 – 6O2
7. … Just for fun write it again.
8. 6H2O2 + 6CO2 (In the presence of sunlight) ----- C6H12O6 + 6O2
9. What reactants go into the light reactions?
Name __________________________________ Date __________________________ Period _____
6H2O2 + Sunlight
10. What reactants go into the Calvin cycle?
6CO2
11. What products come from the light reactions?
6O2
12. What products come from the Calvin cycle?
C6H12O6
13. What chemicals are cycled back and forth between both reactions?
NADPH, NADP+, ATP & ADP + P
14. Use the worksheet I gave you to draw the happenings of a chloroplast below. Be
sure to draw the thylakoids, Light Reactions, Calvin Cycle, what goes into and
out of each reaction and what is cycled between both reactions.
Name __________________________________ Date __________________________ Period _____
15. Describe a photon.
Similar to a small bullet. Has wave properties and particle properties
16. How/why does chlorophyll release electrons?
Photons strike chlorophyll exciting it. When the chlorophyll is reaches a high level of
excitement it releases electrons.
17. What two molecules are created in the light reactions that travel to the Calvin
Cycle?
NADPH
ATP
18. How do the light reactions generate ATP?
ATP Synthase diffuses H+ ions across the thylakoid membrane creating ATP from ADP + P
19. How many NADPH molecules are generated with 2 electrons excited in
photosystem 1?
One
20. Is there significance to the terms photosystem 700 and photosystem 680? If so…
why?
Wavelengths of light they absorb
Name __________________________________ Date __________________________ Period _____
21. Write all 7 steps for the light reactions.
Check your flashcards
22. Write and name all 4 steps for the Calvin Cycle.
Check your flashcards
23. Why is the Calvin cycle a cycle?
It uses the same reactants every time. They are regenerated through the cycle.
24. What is the purpose of CO2 in the Calvin cycle?
Donate more carbon
25. Why don’t we create sugars with 3-PGA?
Too stable of a molecule
26. What molecules are required to turn 3-PGA into G3P?
Name __________________________________ Date __________________________ Period _____
ATP and NADPH
27. Why don’t we kick out 6 molecules of G3P during release?
Would not be anything left to regenerate the cycle
28. What molecule is required for G3P to turn into RuBP?
ATP
29. List all four stages and label the number of carbons in each stage.
Carbon Fixation – 15 turns to 18
Reduction – 18
Release – 18 turns to 15
Regeneration -15
30. Describe how the light reactions and the Calvin cycle work together to create
sugars.
Light reactions provide energy and electrons while the Calvin cycle uses those to
create sugars.