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Photosynthesis Flashcards

(11 cards)

1
Q

Explain the role of water in photosynthesis.(3)

A

H20 > 2e- + 2H+ 0.5 O2
1.provide electrons/H+
2.required for reduction of NADP
3.replace electrons lost by chlorophyll

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2
Q

Explain why the conc of RuBP increased with decreasing CO2. (2)

A

1.TP converted to RuBP
2.not enough co2 available to combine with RuBP

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3
Q

In the LIR the scientist increased conc of CO2 however RuBP and GP amounts remained same. Why.(2)

A

1.limited temp
2.limited enzyme
3.limited RuBP

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4
Q

How is light converted to chemical energy.(3)

A

1.excitation of electrons
2.provides electron carrier
3.to make ATP

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5
Q

Explain the reduce in CO2 uptake.(3)

A

1.less TP converted to RuBP
2.less GP converted to TP
3. Co2 combines with RuBP

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6
Q

Importance of light in photosynthesis.

A

1.provides energy for reduction of NADP/ LDR/ LIR

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7
Q

Describe how NADP is reduced.(2)

A

1.photolysis
2.electrons

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8
Q

Expain why the addition of ADP and Pi caused the dye to change more rapidly.(2)

A

1.ADP levels are a limiting factor
2.ATP made from ADP and Pi

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9
Q

Explain why RuBP increases and GP decreases with lower Co2 levels.

A

1.Less CO2 used to form GP
2. Less CO2 combined with RuBP to form GP

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10
Q

Why glucose conc decreases

A

Used in respiration

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11
Q

How does lack of light cause decrease in GP.

A

1.less reduced NADP and ATP available
2.less GP used to convert to RuBP

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