Unit 3 - Photosynthesis Flashcards

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1
Q

Photosynthesis

A

a biochemical process for building carbohydrates from sunlight and carbon dioxide taken from the air

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2
Q

Thylakoid Membranes

A

highly folded membrane within chloroplasts, location of photosynthetic electron transport chain

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3
Q

Stroma

A

area between thylakoid membrane and inner membrane is called stroma (cytosol of chloroplast)

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4
Q

Photosystems

A

protein pigment complexes that absorb light and initiate photosynthesis

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5
Q

Types of energy that photosynthesis synthesizes?

A

ATP and NADPH - synthesize carbs from CO2 in Calvin cycle

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6
Q

Photosynthesis is a series of REDOX reactions that reduce __ and oxidize __ to produce carbs

A

Carbon, Oxygen

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7
Q

Electromagnetic Spectrum

A

the shorter the wavelength of a photon, the more energy it has. (Purple=high energy, red=low energy)

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8
Q

A Pigment

A

Used by chloroplasts, absorbs light at some wavelengths, and transmits (or reflects) wavelengths that it doesn’t absorb

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9
Q

Resonance

A

process that passes excited state of electron to neighboring chlorophylls (during light absorption by chlorophylls)

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10
Q

Antenna Complex

A

funnels energy of excited electron by resonance to reaction center, where electron transferred to electron acceptor in redox reaction, begins photosynthetic electron transport chain

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11
Q

2 Photosystems

A

Photosystem 1 provides energy needed for NADP+ reduction to NADPH by exciting an e- that was already excited by photosystem II

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12
Q

Z Scheme

A

energy changes in electrons flowing through photosynthetic electron transport chain

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13
Q

Photosynthetic electron transport chain

A

PSII creates proton gradient for ATP synthesis and PSI creates NADPH

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14
Q

Calvin Cycle

A

consists of 15 chemical rxns, grouped into carboxylation, reduction, and regeneration, that synthesize carbohydrates from CO2

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15
Q

Rubisco (most abundant protein in world)

A

1.Catalyzes CO2 incorporation into RuBP
2.Highly abundant in chloroplasts, notoriously slow rxn rate
3.Can accidentally add O2 to RuBP instead of CO2

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