Photosynthesis 1 And 2

Question 1

Photosynthesis Stage I

Answer 1

• also known as light dependent reaction
• uses light energy —> water is split into hydrogen and oxygen and ATP and NADHP are created.

ATP and NADPH is used in the Calvin Cycle (photosynthesis stage 2)

• happens in the Thylakoid discs inside the cholroplast
• by product is Oxygen

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Question 2

Photosynthesis Stage 2

Answer 2

• Stage II is called the Calvin cycle.
• light independent cycle (dark reaction)
• occurrs in the stroma/stromata

The second stage of photosynthesis is the production of glucose from carbon dioxide.

This process occurs in a continuous cycle, named after its discoverer, Melvin Calvin.

The Calvin cycle uses CO2 and the energy temporarily stored in ATP and NADPH to make the sugar glucose. Photosynthesis is a two stage process.

Takes 6 turns of the Calvin cycle for 1 molecule of glucose

Question 3

Where does photosynthesis 1 occur?

Answer 3

In the chloroplast within the Thylakoid disc (granna which are stacks of thylakoid discs)

Question 4

Where does photosynthesis 2 occur?

Answer 4

In the Stroma part of the cholorplasts