Photosynthesis Review Worksheet - Weebly



Photosynthesis Review Worksheet

Part A

Match the terms below with the correct description

Chlorophyll

Chloroplast

Electron transport chain

Grana

Light-dependant reactions

Light-independent reactions

Photosynthesis

Photosystem

Stroma

Thylakoid

a. __________________energy-capturing portion of photosynthesis that takes place in thylakoid membranes of chloroplasts and cannot proceed without solar energy, it produces ATP and NADPH

b. __________________green pigment that absorbs solar energy and is important in photosynthesis

c. __________________ large, central compartment in a chloroplast that is fluid filled and contains enzymes used in photosynthesis

d. __________________ membrane-bounded organelle with chlorophyll – containing membranous thylakoids; where photosynthesis takes place

e. __________________Photosynthetic unit where solar energy is absorbed and high-energy electrons are generated; contains a pigment complex and an electron acceptor

f. __________________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.

g. __________________Process usually occurring within chloroplasts whereby chlorophyll traps solar energy and carbon dioxide is reduced to a carbohydrate.

h. __________________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.

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, 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. 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?

14. 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?

15. Where does the Carbon Dioxide come from? What is the process it goes through that fixes it from an inorganic compound into an organic molecule?

16. How many molecules of carbon dioxide enter one Calvin Cycle? How many cycles are required for one high-energy sugar to be made?

17. Explain why the leaves change colors in the fall

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