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BIOLOGY I > CH10 Photosynthesis > Flashcards

CH10 Photosynthesis Flashcards

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1
Q

Photosynthesis

A

Converts light energy to chemical energy

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2
Q

Site of Photosynthesis

A

Chloroplast

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3
Q

Leave green pigment

A

Chlorophyll

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4
Q

Pores for gas exchange

A

Stomata

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5
Q

Photosynthesis Reaction

A

6 CO2 + 6H2O —> C6H12O6 + 6 O2

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6
Q

Splitting of Water=

A

2H2O —-> 4H+ + 4e- + 6O2

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7
Q

Photo. Redox

A

CO2 is reduced

H2O is oxidized

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8
Q

steps of PSYN.

A
  1. light Reactions
  2. Calvin Cycle (synthesis)
  3. Gluconeogenesis (also synthesis)
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9
Q

Light RXN’s happen in…

A

Thylakoids

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10
Q

Dark RXN’s happen in …

A

Stroma

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11
Q

Nature of Sunlight

A

Light is a form of electromagnetic energy (EM Radiation)

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12
Q

Electromagnestic Spectrum

A

entire range of EM energy

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13
Q

Light colors which drive PSYN

A

Red and Blue

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14
Q

Pigments function

A

Absorb Light for PSYN

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15
Q

2 major pigments

A

Chlorophyll ALPHA and beta

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16
Q

Carotenoids

A

absord excessive light which would damage chlorophyll

17
Q

Photosystem

A

Light Harvesting complexes

18
Q

PS II

A

Absorbs blue light P680

strong oxidizing agent

19
Q

PS I

A

Absorbs red light (P700)

20
Q

Carbon In Calvin Cycle

A
  • CO2 enters and leaves as organic acid (called G3P)
21
Q

Gluconeogenesis

A

2G3P used to make Glucose

22
Q

Glucose uses

A
  • Glucose cannot accumulate;
    1. Sucrose
    2. Starch (storage)
    3. Cellulose (structure)
23
Q

C3 Plants

A

Plants use rubisco & have to close stoma on hot days

Dehydration occurs

24
Q

C4 Plants

A

_tropical grasses etc.

  • uses PEP carboxylase (higher affinity for CO2)
  • Avoids Rubisco
  • SPATIAL DIFFERENCE
25
Q

CAM Plants

A
  • ie. Cactus etc.
  • Stomata only open at night
  • TEMPORAL DIFFERENCE

BIOLOGY I (20 decks)

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