Ch. 9 - Photosynthesis Review Worksheet
Use your knowledge of photosynthesis & your notes to complete this worksheet.
1. Write out the CHEMICAL equation for photosynthesis.
6CO2
+
12H2O
(reactants)
chlorophyll & sunlight

C6H12O6 + 6O2 +
(products)
6H2O
2. Name the REACTANTS needed photosynthesis.
Carbon dioxide and water
3. Name the PRODUCTS formed by photosynthesis.
Glucose, oxygen, & water
4. How do plants get the water that they require for photosynthesis?
Absorbed through roots by osmosis & then enters the xylem tubes in veins.
5. How do plants get the carbon dioxide that they require for photosynthesis?
Enters through the stomata/pores in the leaf by diffusion.
6. What do plants do with the glucose produced by photosynthesis; discuss 3 things.
a. Use glucose for food which gives plants energy.
b. Excess glucose is stored in roots as polysaccharide starch.
c. Some glucose is converted into polysaccharide cellulose which builds cell
walls.
7. What do plants do with the oxygen produced by photosynthesis?
They release some oxygen into the air AND recycle some oxygen to the
mitochondria for cellular respiration.
8. What can plants do with the “new” water produced by photosynthesis?
a. Use it to rehydrate their cytoplasm.
b. Store it in their vacuole(s).
c. Release it into the air through their stomata by transpiration.
9. What happens during transpiration?
Water vapor is released into the air through the stomata.
10. In what plant ORGANELLE does photosynthesis occur? Chloroplasts
11. Name the green PIGMENT inside the chloroplast. Chlorophyll
12. What is the function of chlorophyll?
To absorb energy from sunlight.
13. Where in the chloroplast is the chlorophyll located; thylakoid/grana or stroma?
Thylakoids/grana membranes
14. What type of energy is sunlight converted/changed into during photosynthesis?
Solar energy is converted into chemical energy stored in glucose.
15. Is glucose (C6H12O6) an organic or inorganic molecule? How can you tell?
It’s an organic molecule because it has 6 carbon atoms (must have 2 or more
carbons.).
16. Is water split into hydrogen and oxygen by the energy from sunlight in the
light dependent or light independent reactions? Underline the correct answer.
Energy from sunlight + 12H2O  12 H2 + 6 O2 + energy stored in ATP
17. What happens to the hydrogen produced during the light dependent reactions?
It is used in the light independent reactions to make glucose.
18. What happens to the oxygen produced during the light dependent reactions?
It is released into the atmosphere.
19. ATP is also a product of the light dependent reactions; what is its function?
ATP provides energy to the light independent reactions to form glucose.
20. Where in the chloroplasts do the light dependent reactions take place?
In the thylakoids/grana.
21. During which reaction are glucose and water formed; light dependent or light
independent reactions? Underline the correct answer.
22. Is glucose formed in the thylakoid membranes/grana or in the stroma (liquid) of the
chloroplast?
Glucose is formed in the stroma (fluid inside the chloroplast)
23. Identify the molecule that provides energy to the light independent reactions.
ATP provides energy to the light independent reactions
24. What part of the electromagnetic spectrum provides the light energy for
photosynthesis? Visible light spectrum
25. Which cells in our eyes allow us to see colors? Cone cells
26. Which cells in our eyes allow us to distinguish between light and dark? Rod cells
27. Where does most of the photosynthesis in the world take place? The oceans
28. Besides plants, what 2 kingdoms of organisms carry out photosynthesis?
Some Eubacteria (cyanobacteria) and Protists (Euglena).
29. CELLS in the leaf that carry out photosynthesis. (look at the diagram in your notes)
Palisade and spongy mesophyll cells and guard cells.
30. These special epidermal cells control/regulate the opening & closing of the stomata
in the leaf. (look at the diagram in your notes) Guard cells
31. CELLS in the leaf that contain the chloroplasts. (look at the diagram in your notes)
Palisade and spongy mesophyll cells and guard cells.
32. Organisms that require oxygen are called… aerobic organisms
33. Glucose is transported through these tubes in the vascular bundle of the leaf.
Phloem
34. Water is transported through these tubes in the vascular bundle of the leaf.
Xylem
35. The term “photo” means… Light
36. The term “lysis” means… to split
37. So what does the term photolysis mean? To split water using light energy.
38. Label the diagram of the leaf.
1. cuticle
2. upper epidermis cells
3. palisade mesophyll
4. spongy mesophyll
5. xylem
6. phloem
7. lower epidermis cells
8. guard cells
9. stomata
10. chloroplasts – the
“dots” in the mesophyll
cells.
Note: Spaces in spongy
mesophyll are air spaces
39. Label the diagram of the chloroplast.
Refer to diagram in photosynthesis notes.