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BOTAFUN > Photosynthesis > Flashcards

Photosynthesis Flashcards

1
Q

theory of ancient Greek about photosynthesis

A

plants are soil eaters

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2
Q

contribution of Jan Baptiste van Helmont

A

experiment with willow plant, plant matter comes from water alone

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3
Q

contribution of Joseph Priestley

A

vegetation restores injured air, plants produce o2 or dephlogisticated air

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4
Q

contribution of jean senebier

A

photosynthesis depends on co2

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5
Q

Who stated that there are two gases involved in photosynthesis

A

Lavoisier

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6
Q

contribution of nicholas de saussure

A

water is an important requirement
co2 + h2o + light -> organic matter + o2

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7
Q

scientist who discovered that red and blue light are effective in producing o2 during photosynthesis

A

engelman

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8
Q

scientist that discovered chlorophyll which absorbs the light in photosynthesis

A

sachs

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9
Q

contribution of van Niel and Robin Hill

A

o2 came from water in a process called photolysis aka Hill’s reaction

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10
Q

final electron acceptor in photosynthesis

A

NADP+

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11
Q

definition of photosynthesis

A

anabolic, endergonic, co2 requiring process that uses light energy and water to produce organic macromolecules

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12
Q

complete equation of photosynthesis

A

6co2 + 12h2o + light energy -> c6h12o6 + 6o2 + 6h2o

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13
Q

What is oxidized and reduced in photosynthesis

A

oxidized: water is oxidized to oxygen
reduced: carbon dioxide is reduced to glucose

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14
Q

oxidation vs reduction (O, H, e-, energy)

A

oxidation: +O, -H, -e-, release energy, exergonic

reduction: -O, +H, +e-, stores energy, endergonic

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15
Q

main photosynthetic pigment

A

chlorophyll a

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16
Q

where are photosynthetic pigments located

A

inside thylakoid or cell membrane if cyanobacteria

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17
Q

function of accessory chlorophyll pigments

A

absorb different wavelengths of light energy and pass the energy to chlorophyll a

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18
Q

where is chlorophyll b found

A

all true plants

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19
Q

where is chlorophyll c found

A

golden brown and brown algae

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20
Q

where is chlorophyll d found

A

red algae

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21
Q

red algae have which chlorophyll pigments

A

a and d

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22
Q

light absorbing head of chlorophyll

A

porphyrin ring

23
Q

what elements is at the center of chlorophyll

A

Mg

24
Q

difference between chlorophyll a and b structure

A

a - CH3 end in porphyrin ring
b - CHO end in porphyrin ring

25
Q

chlorophyll is what type of molecule

A

lipid

26
Q

function of hydrocarbon tail in chlorophyll

A

interacts with hydrophobic regions of proteins inside thylakoid membrane

27
Q

organisms with chlorophylls a, b and carotenoids

A

mosses, ferns, seed plants, green algae, euglenoids, prochlorophytes

28
Q

organisms with chlorophylls a, c and carotenoids

A

diatoms, dinoflaagellates, brown algae

29
Q

organisms with chlorophyll a, d, carotenoids, phycobiliproteins

A

red algae, cyanobacteria

30
Q

function of phycobiliproteins

A

capture low light levels for deep water

31
Q

composition of photosystem

A

major reaction center (chlorophyll a), accessory pigments, primary electron acceptor

32
Q

p700

A

photosystem I

33
Q

p680

A

photosystem II

34
Q

function of carotenoids

A

protect chlorophyll from high energy that will degrade chlorophyll

35
Q

which absorbs more light, chlorophyll a or b

A

b

36
Q

graph plotting pigment’s light absorption versus wavelength

A

absorption spectrum

37
Q

absorption spectrum of chlorophyll a suggests that __ and __ light work best for photosynthesis

A

violet-blue and red

38
Q

profiles the relative effectiveness of different wavelengths or radiation in driving a process

A

action spectrum

39
Q

atp production in presence of light

A

photophosphorylation

40
Q

strongest known biological oxidizing agent

A

P680+

41
Q

first byproduct of linear electron flow

A

oxygen

42
Q

what happens in cyclic electron flow

A

electrons cycle back from Fd to PS I reaction center

43
Q

products of cyclic electron flow

A

ATP

44
Q

is there oxygen released in cyclic electron flow

A

no

45
Q

what photosystem is used in cyclic electron flow

A

PS I

46
Q

where does calvin cycle occur

A

stroma

47
Q

chemiosmosis in mitochondria vs chloroplasts

A

mitochondria - protons are pumped to the intermembrane space and diffuse back into mitochnodrial matrix

chloroplast - protons are pumped to the thylakoid space and diffuse back into stroma

48
Q

c3 vs c4 plant structure

A

c3 - no chloroplast in bundle sheath cells
c4 - with chloroplast in bundle sheath cells so these are also photosynthetic

49
Q

where does calvin cycle take place in C4 plants

A

photosynthetic bundle sheath cells

50
Q

where does light rxn occur in c4 plants

A

mesophyll cells

51
Q

where does calvin cycle occur in c4 plants

A

bundle sheath cells

52
Q

c4 vs cam pathway

A

c4 - spatial separation
cam - temporal separation

53
Q

when does light rxn occur in cam plants

A

day

BOTAFUN (8 decks)

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