Name _________________________________________
Photosynthesis Worksheet
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Date ________________
Organisms that can make their own food are referred to as being ________________________
Organisms like us that need to obtain energy from the food we eat are ________________________
The principal chemical compound that living things use to store energy is _________
The difference between ATP and ADP is that ADP has ____ Phosphate groups while ATP has ____ P.
The available energy is stored in the last bond of the ___________ _________
Fill in the diagram below from Figure 8-3
7. When ATP breaks the bond connecting the lasts phosphate group to it, ___________ is released and
_____ is formed.
8. Identify a cell transport method that uses ATP as an energy source. _____________________________
9. A single molecule of glucose can store 94 times more chemical energy than a single molecule of ATP
10. ___________________________ is the process whereby plants use energy from light to convert
_______ & _______ into ________ and carbohydrates
11. The formula for photosynthesis is _________ + __________
___________ + _______
12. The main pigment used for photosynthesis is _________________________________
13. Label the diagram of the chloroplast below. (Figure 8-6)
14. Thylakoids of the grana contain the pigment____________________ . They capture _________
energy. This is where the ___________________ reaction takes place
15. The _________________ is where the _______________ cycle occurs.
16. Fill in the diagram below of an Overview of Photosynthesis (Figure 8-7)
17. When the light energy is absorbed by the electrons in chlorophyll, they gain energy. These high energy
electrons need a special carrier to transfer them. This electron carrier is called ______________
18. When _________ accepts 2 high energy electrons, it becomes __________. The sun’s energy is now
contained in this compound.
19. The Light Dependent Reaction needs ________ energy and will produce ____________ and convert
ADP to __________ and NADP+ to ____________.
20. The light energy will first be absorbed by chlorophyll’s electrons in Photosystem ____. These high
energy electrons will now be passed down the ______________ ______________ chain.
21. To replace the electrons lost from Photosystem II, ________ will break up into 4 electrons, 4 + ions and
1 O2 molecule. The 2 electrons replace the lost electrons from Photosystem II. The oxygen will be
________ as _____.
22. The electrons that were passed down the electron transport chain (ETC) after Photosystem II will
eventually end up in Photosystem ___. After Photosystem I, the electrons will be passed on to
________ and it will become ________.
23. When the H+ ions are released when water was split, they create a difference in ____________ across
the thylakoid membranes. This difference will be used to make ________
24. Since the H+ ions from above can’t cross the thylakoid membranes directly, they need the help of the
enzyme _________________________ which will allow them to pass passively and produce _______.
25. So to summarize the Light Reaction, in step A, ___________ was absorbed, ________ was split,
releasing _______, in B & C_______ was produced when the electrons passed down the ETC and
in step E ________ was produced. All of this occurred in the _______________ of the chloroplast
E
B
ee-
A
C
D
26. The ___________ Cycle uses_____ and ________ produced in the Light Reaction to produce ________
27. ____________ enters the cycle from the __________________. It will combine with a 5 carbon
compound and then split into two 3- carbon molecules.
28. The 2, 3 carbon molecules will then receive the energy from ______ & _________ to form the higher
energy glucose molecule.
29. Label the diagram below of the Calvin Cycle using Figure 8-11
A
2
D
B
C
30. So in summary, The Calvin Cycle occurs in the __________ of the chloroplast, takes in _______,
uses the _____ and _________ from the Light Reaction and produces _____________________.