Photosynthesis Review Worksheet NAME_______________
Part A
Match the terms below with the correct description
Chlorophyll
Chloroplast
Electromagnetic spectrum
Electron transport chain
Grana
Light-dependant reactions
Light-independent reactions
Photon
Photosynthesis
Photosystem
Stroma
Thylakoid
a. __________________ packet of solar energy
b. __________________energy-capturing portion of photosynthesis that takes place
in thylakoid membranes of chloroplasts and cannot proceed without solar energy,
it produces ATP and NADPH
c. __________________green pigment that absorbs solar energy and is important in
photosynthesis
d. __________________ large, central compartment in a chloroplast that is fluid
filled and contains enzymes used in photosynthesis
e. __________________ membrane-bounded organelle with chlorophyll –
containing membranous thylakoids; where photosynthesis takes place
f. __________________Photosynthetic unit where solar energy is absorbed and
high-energy electrons are generated; contains a pigment complex and an electron
acceptor
g. __________________Passage of electrons along a series of carrier molecules
form a higher to a lower energy level; the energy released is used for the synthesis
of ATP.
h. __________________Process usually occurring within chloroplasts whereby
chlorophyll traps solar energy and carbon dioxide is reduced to a carbohydrate.
i. __________________ Series of photosynthetic reactions in which carbon dioxide
is fixed and reduced in the chloroplast.
j. __________________Synthesis portion of photosynthesis that takes place in the
stroma of chloroplasts and does not directly require solar energy; it uses the
products of the light dependant reactions to reduce carbon dioxide to a
carbohydrate
Answer the following questions
1. Explain the difference between autotrophs and heterotrophs. Give two examples of
each.
2. Below draw a molecule of ATP. Label: ADP, adenosine, adenine, ribose, phosphate
groups, chemical bond that would be broken if energy needed to be released.
3. Below draw a diagram of chloroplast and label the following: chloroplast membrane,
thylakoid, granum (grana), stroma, thylakoid membrane, thylakoid innerspace, location
of pigments.
4. Explain why chloroplasts are green.
5. What is NADPH? What is the difference between NADP+ and NADPH? How does
NADP+ turn into NADPH?
6. Write the chemical equation for the process of photosynthesis.
7. What are the reactants and products of Light Dependant Reactions? Where in the
chloroplast do they occur?
Reactants:
Products:
Location:
8. What are the reactants and products of Light-Independent Reactions? Where in the
chloroplast do they occur?
Reactants:
Products:
Location:
9. Describe the Light-Dependant reaction.
10. What are the beginning and ending products for Photosystem I and Photosystem
II?
11. Describe the purpose for photosystem I and photosystem II.
12. When a water molecule is split, what is it split into? Where do all the resulting
components end up?
13. At what steps of L-D reactions is ATP made. What is it specifically used for? (this
will be different depending when and where is it produced)
14. Describe the action of protein carrier: ATP synthase? Explain why is it important
to build up a Hydrogen ion concentration gradient in order to have it properly
function?
15. What are Light-Independent Reaction often called?
16. Why is there a need to go on with Light – Independent reactions? Why not stop
with the Light –Dependant Reactions since ATP and NADPH are energy carrying
molecules?
17. Where does the Carbon Dioxide come from? What will happen to it and what will
it eventually become?
18. How many molecules of carbon dioxide enter one Calvin Cycle? How many
molecules of high-energy sugars are produced as a result of one Calvin Cycle?
19. Explain why the trees lose their leaves in the fall.