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BIOL241 > Photosynthesis > Flashcards

Photosynthesis Flashcards

1
Q

Discrete particle of packet of energy

A

Photons

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2
Q

Wavelength range of visible light

A

400 nm to 700 nm

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3
Q

What happens when a photon is absorbed

A

energy is transferred to an electron and it moves to a higher level energy state

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4
Q

what molecules are efficient in absorbing photons of specific wavelengths

A

pigments

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5
Q

what do all pigments have in common

A

a conjugating system of double/single carbon bonds

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6
Q

what does a blye 450 nm wavelength do to an electron

A

raise 2 levels

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7
Q

what does a red 700 nm wavlength do to an electron

A

raise 1 level

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8
Q

Photoautotrophic organism are known as what in the food chain

A

primary producers

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9
Q

What domains are able to use photosynthesis

A

Eukarya and Bacteria

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10
Q

Are halobacteria photosynthetic

A

No

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11
Q

What is photosynthesis

A

use of light energy to convernt carbondioxide into organic compounds

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12
Q

What is the chemical reaction of photosynthesis

A

6CO2 + 12H20 -> C6H12O6 + 6O2 +6H20

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13
Q

where are the enzymes of the Calvin Cycle in cyanobacteria

A

Cytosol

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14
Q

the process where an excited electron from a pigment molecule returns to its ground state, releasing energy or an emission of light

A

fluorescence

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15
Q

where are photosynthetic pigments embedded

A

thylakoid membranes

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16
Q

Main pigment in most photoautotrophs

A

chlorophylls

17
Q

Accessory pigments

A

carotenoids

18
Q

X chain in chlorophyll A

A

CH3 methyl group

19
Q

X chain in chlorophyll B

A

CHO aldehyde group

20
Q

A plot of how much light is intercepted (absorb) by the pigment

A

absorption spectrum

21
Q

why do pigments absorb different wavelengths of light

A

the energy of the photon has to math the energy required to excite the electron or else nothing happens

22
Q

how can you measure the rate of photosynthesis

A

through rate of consumption of CO2 and production of O2

23
Q

plot of effectiveness of lightat each wavelength during photosynthesis

A

action spectrum

24
Q

who produced the earliest action spectra

A

Theodor Engelmann

25
Q

What has more energy? a photon of green light or a photon of red light

A

green light

26
Q

What greater wavlengths? a photon of green light or a photon of red light

A

red light

27
Q

what are the 3 fates of an excited-state electron

A

energy is released as heat or light (fluorescence), energy is transferred to a pigment molecule and it returns to normal state, the electron is transferred to an electron-accepting molecule

28
Q

Difference between action spectrum and absorption spectrum

A

absorption is how much light is absorbed by the pigment while action spectrum is the effectiveness of light of a specific wavelength to drive a prodess

29
Q

what is the transfer of energy from one electron to another

A

inductive resonance

30
Q

what molecule shuttles electrons from photosystem II to the cytochrome complex

A

plastoquinone

31
Q

what special chlorophyll molecyle is in photosystem II

A

P680

32
Q

what special chlorophyll molecyle is in photosystem I

A

P700

33
Q

What transfers protons to the thylakoid lumen to create a proyon motive force

A

plastoquinone

34
Q

where are the proteins for photosynthesis imbedded

A

thylakoid membrane

35
Q

What process gets a chlorophyll molecule into a state at which it is ready to give up an electron?

A

Absorpotion of photons of light

36
Q

The use of light to generate ATP

A

photophosphorylation

37
Q

flow of electron from photosystem II to photosystem I

A

linear electron transport

38
Q

what form of transport occyrs only with photosystem I to continuously increase thr PMF in the thylakoid lumen

A

cyclic electron transport

39
Q

is the calvin cycle exergonic or endergonic?

A

endergonic

BIOL241 (6 decks)

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