8.3 The Process of Photosynthesis

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6. How does ATP synthase produce ATP?

ATP synthase uses protons to bind ADP and phosphate, which creates ATP

10. What does the Calvin cycle use to produce high-energy sugars?

CO2 molecules, ATP, and NADPH

2. The light-dependent reactions begin when 𝗣𝗵𝗼𝘁𝗼𝘀𝘆𝘀𝘁𝗲𝗺 𝟭 absorbs light

False, photosystem 2

9. Complete the table by summarizing what happens in each phase of the light-dependent reactions of photosynthesis: Hydrogen Ion Movement and ATP Formation

Hydrogen ions escape the thylakoids while ATP is being produced

8. Where do the light-dependent reactions take place?

In the thylakoids

9. Complete the table by summarizing what happens in each phase of the light-dependent reactions of photosynthesis: Photosystem 2

It captures photons from light and uses it to extract electrons from water molecules

9. Complete the table by summarizing what happens in each phase of the light-dependent reactions of photosynthesis: Electron Transport Chain

It creates a proton gradient that makes ATP. It also stores energy in NADPH.

9. Complete the table by summarizing what happens in each phase of the light-dependent reactions of photosynthesis: Photosystem 1

It uses light energy to transport electrons to the stroma

15. Would a plant placed in an atmosphere of pure oxygen be able to conduct photosynthesis? Explain your answer.

No, because CO2 is vital for photosynthesis and it cannot use O2.

17. Photosynthesis plays an important role in supplying energy to living things. Considering what the products of photosynthesis are, what is another way in which photosynthesis is vital to life?

One of the products of photosynthesis is O2, oxygen. Animals need oxygen to live. If plants didn't produce O2, every animal would die.

13. Complete the diagram of the Calvin cycle by filling in the missing labels.

Starting at the top of the circle and going to the right, the first gap is, 12 PGA. The next gap is 12 G3P. The next gap is 6 RP. The next gap is 6 RuBP. The gaps on the outside of the circle, again starting from the top and going to the right, is 12 ADP. Next is 12 NADP+. Last is 6 ADP.

14. What are three factors that affect the rate at which photosynthesis occurs?

Temperature, amount of light, and amount of water

12. What makes the Calvin cycle a cycle?

The starting materiel is regenerated at the end

11. Why are the reactions of the Calvin cycle called light-independent reactions?

They are not driven by light energy.

7. When sunlight excites electrons in chlorophyll, how do the electrons change?

They become high energy electrons

1. Photosystems are clusters of chlorophyll and proteins.

True

3. Electrons from water molecules replace the ones lost by photosystem 2

True

4. ATP is the product of photosystem 1

True

5. ATP and NADPH are two types of protein carriers

True

16. Complete the table about variations of photosynthesis: First row

Type: C4 Examples: Crabgrass, sugarcane, and corn

16. Complete the table about variations of photosynthesis: Second row

Type: CAM Description: Separates the processes between night and day to adapt to dry environments


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