Photosynthesis Review Worksheet
Name:______
Part A
Match the terms below with the correct description
Chlorophyll Chloroplast Electromagnetic spectrum Electron transport chain
Grana Photon Light-dependant reactions Light-independent reactions
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
Part B
Answer the following questions
1. Explain the difference between autotrophs and heterotrophs. Give two examples of each.
2. 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. 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. (use the correct information from the electromagnetic spectrum)
5. What is NADPH? What is the difference between NADP+ and NADPH? How does NADP+ turn into NADPH?
6. Write the chemical equation that summarizes the process of photosynthesis.
7. How does the amount of energy in light change as the wavelength increases?
8. What are the reactants and products of Light Dependant Reactions? Where in the chloroplast do they occur?
Reactants:
Products:
Location:
9. What are the reactants and products of Light-Independent Reactions? Where in the chloroplast do they occur?
Reactants:
Products:
Location:
10. Write an equation that summarizes the Calvin cycle
11. Write an equation that summarizes the light-dependent reactions.
Part C
Light Reactions:
1. Every time a photon is absorbed in the chlorophyll a, 2 electrons are excited. They are not recycled. Where does the supply of electrons come from and where do they end up at the end of L-D set of reactions?
2. What products result specifically from Photosystem I and Photosystem II?
3. When a water molecule is split, what is it split into? Where do all the resulting components end up?
4. 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)
5. 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?
Part D
6. What photosynthesis waste product is formed in the light reactions?
Light-Independent Reaction
1. What are Light-Independent Reaction often called?
2. Where does the Carbon Dioxide come from? What will happen to it and what will it eventually become?
3. 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?
4. What are the steps of the Calvin Cycle where ATP is needed?
5. Explain how temperature, intensity of light and water affect the rates of photosynthesis?
Part E
1. Label the diagram below to summarize the two stages of photosynthesis. Use the word bank below the diagram to fill in the blanks.
Word list:
thylakoids Calvin cycle CO2 NADP+
granum light NADPH O2
stroma H2O ATP ADP + P
light reactions sugar