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Molecular & Cellular Biology > Photosynthesis > Flashcards

Photosynthesis Flashcards

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1
Q

Define Photosynthesis

A

The process in which plants use carbon dioxide and water to produce food

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2
Q

Who exactly does photosynthesis?

A

Autotrophs

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3
Q

List two of photosynthesis’ benefits

A

Food production
Oxygen production

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4
Q

What are photons?

A

Packets of energy of fixed quantity

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5
Q

Shorter wavelength, the _______ energy per photon

A

more

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6
Q

Thin flat surface _________ surfae area for light absorption

A

Increases

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7
Q

What is stomata?

A

Pores in bottom surface of leafs, let CO2 in

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8
Q

What are pigments?

A

Molecules that absorb some w/lengths of light while reflecting other w/lengths of light

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9
Q

why is the color of a pigment what it is?

A

Color is that of the w/lengths reflected

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10
Q

Photosynthetic Pigments of Plants

A

Chlorophyll a
Chlorophyll b
Carotenoids

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11
Q

What is the photoelectric effect?

A

Removal of an electron from a molecule by light

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12
Q

Photoelectric effect occurs when protons _____________ to electrons

A

Transfer energy

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13
Q

Explain what happens during calvin cycle:

A

ATP & NADPH used to power reactions that combine CO2 forming glucose

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14
Q

Photosystem I is supplied with:

A

Chlorophyll a

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15
Q

Photosystem II is supplied with:

A

Chlorophyll b

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16
Q

Photosystems and making ATP & NADPH
Step 1: ______ Absorbs light first

A

Photosystem II

17
Q

Photosystems and making ATP & NADPH
Step 2: ________ excited and caught by primary ________ acceptor

A

electrons, electron

18
Q

Photosystems and making ATP & NADPH
Step 3: Electrons lost are replaced by splitting ______, producing _____ as a byproduct

A

H2O, O2

19
Q

Photosystems and making ATP & NADPH
Step 4: Electrons travel down ___________________, to NADP+ forming NADPH

A

Electron transport chain

20
Q

Light Dependent Reactions require presence of _______

A

Light

21
Q

Light dependent reactions occur in __________ of chloroplasts

A

Thylakoids

22
Q

Light dependent reactions use energy from light to produce ________ and ________

A

ATP, NADPH

23
Q

When light dependent reactions occur, ________ is produced as a by-product

A

Oxygen

24
Q

Where does the calvin cycle takes place?

A

Chloroplast stroma

25
Q

ATP & NADPH from light reactions used to combine _______ into glucose

A

CO2

26
Q

Greenhouse gases: Main one

A

Carbon Dioxide

27
Q

Greenhouse gas examples:

A

Methane, water vapor, nitrous oxide, ozone

28
Q

Increase atmospheric CO2 levels: ________Temperature

A

Increase

29
Q

Decrease atmospheric CO2 levels: ________Temperature

A

Decrease

30
Q

Cellular respiration adds ________ to atmosphere

A

CO2

31
Q

Photosynthesis removes _________ from atmosphere

A

CO2

32
Q

Calvin Cycle steps

A

1: Carbon fixation
2: Reduction
3: Release of one molecule of G3P
4: Regeneration of RuBP

Molecular & Cellular Biology (10 decks)

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