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Biology > 3.2 Photosynthesis > Flashcards

3.2 Photosynthesis Flashcards

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1
Q

Leaf

A

Thin
Short diffusion pathway for light
More light reaches chloroplasts

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2
Q

Stroma

A

Guard cells to open/close
Allows carbon dioxide to diffuse into leaf

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3
Q

Air spaces in spongy mesophyll

A

Allows CO2 to diffuse into palisade cells

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4
Q

Large surface area

A

Allows maximum light absorbency

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5
Q

Palisade cells have a large vacuole

A

Stores water

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6
Q

Palisade cells are cylindrical at right angles to leaf surface

A

Ensures chloroplasts are at top of cell
Vacuole at bottom

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7
Q

Waxy cuticle

A

Light penetrates through to palisade mesophyll

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8
Q

Many chloroplasts in palisade cells

A

More photosynthesis

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9
Q

Chloroplasts move within palisade cells

A

Position themselves for max absorption of light at different times of day

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10
Q

CO2 + H2O =

A

O2 + C6H12O6

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11
Q

Types of pigment

A

Chlorophyll a
Chlorophyll b
Carotene
Xanthophyll

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12
Q

Chlorophyll a

A

Green

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13
Q

Chlorophyll b

A

Green

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14
Q

Carotene

A

Orange

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15
Q

Xanthrophyll

A

Yellow

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16
Q

Pigments that contain magnesium

A

Chlorophyll a
Chlorophyll b

17
Q

Photosystem

A

Light harvesting from cluster of pigment molecules organised ina very precise way

18
Q

What is in a photosystem

A

Primary reaction centre of chlorophyll A
Organised around this in a y shaped funnel is a series of accessory pigments consisting of chlorophyll B and carotenoids

19
Q

Carotenoids

A

Carotene
Xanthophyll

20
Q

Chlorophylls absorb

A

Red and blue/violet

21
Q

Carotenoids absorb

A

Blue/violet

22
Q

Why is phosphate needed in plants

A

Makes ATP and DNA

23
Q

Why are nitrates needed for plants

A

Making amino acids and DNA

24
Q

Why is magnesium needed in plants

A

Makes chlorophyll

25
Q

Englemanss experiment

A

Refracted light with a prism

26
Q

Explain englemanns experiment

A

-Aerobic Bactria cluster at the red and blue wavelengths and fewer at green wavelength
-More O2 concentration at red and blue
-More photosynthesis at these and photosynthesis produces O2
-Because these pigments absorb light best at those wavelengths

27
Q

Control englemanns experiment

A

Remove prism so white light is used
Aerobic bacteria is distributed evenly along the photosynthetic algae

28
Q

2 parts of photosynthesis

A

Light dependant
Light independent/Calvin

29
Q

Light dependent

A

Happens on the thylakoid membrane + produces ATP and NADPH2
Used for light independent reaction

30
Q

Light independent

A

Occurs in stroma
Produces glucose

Biology (5 decks)

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