Photosynthesis Flashcards

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1
Q

What happens in the first stage of photosynthesis

A

Light energy is absorbed by a pigment and creates high energy electrons, electrons go through electron transport chain and release energy to generate ATP by ATP synthase, energy used to split water (photolysis), hydrogen ions transferred to NADP to make NADPH for second stage

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2
Q

What is the first stage called

A

Photolysis

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3
Q

What is the second stage called

A

Carbon fixation (Calvin cycle)

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4
Q

What happens in the second stage of photosynthesis

A

CO2 enters the cycle and attaches to RuBP (reaction controlled by RuBisCo), Cu2+RuBP to make 3PG, 3PG is phosphorylated by ATP and combines with hydrogen ions from NADPH which produced G3P, some G3P is then used to regenerate RuBP and the remainder is used to synthesise glucose.

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5
Q

What is RuBP

A

Ribulose bisphosphate

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6
Q

What is 3PG

A

3-phosphoglycerate

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7
Q

What is G3P

A

Glyceraldehyde-3-phosphate

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8
Q

What are the uses of Glucose

A

Respiration, starch (storage carbohydrate), cellulose (structural carbohydrate), biosynthesis pathways

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9
Q

What are the biosynthesis pathways

A

DNA, protein, fat

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