• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/42

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

42 Cards in this Set

  • Front
  • Back
describe the electron carrier in photosynthesis
nadp+
reduction phase of calvin cycle
plants are what type of organism on earth
photoautotrophs: primary producers
name the parts of the chloroplast
outer membrane
intermembrance compartment
inner membrane
stroma
granum
thyloakoid membrane
thylakoid
thylakoid lumen
stromal lamellae
where is the chloroplast located
in a photosynthetic cell in a leaf
where do light dependent and light independent reactions occur?
thylakoid membrane; stroma
what are the three fates of electrons when they are excited by a photon
1. return to ground state, emit light energy > wavelength (less energy) of photon
2. return to ground state
light energy absorbed by nearby pigment
aka inductive resonance
3. eletron in donated in its high energy state to a primary electron acceptor
2/3 electron returns to ground state
name 3 photosynthetic pigments
chlorphyll
bacteriochlorophyll
carotenoids
cyanobacteria use bacteriochlorophyll T/F
F: photosynthetic prokaryotes OTHER THAN cyanobacteria use bacteriochlorophyll
algea and plants use chlorophyll pigments T/F
T
name the accessory pigments
carotenoids, chlophyll b
chlorophyll a and b differ in where a ch3 is attached
they differ in what is attached in the same place; CH3 or CHO
what do accessory pigments do
inductive resonance of chlorophyll a
green is the main wavelength of light that drives photosynthesis T/F
f: the absoportion spectrum of photosynnthesis has max O2 release at red (long) and violet (short) wavelengths
absorption spectrum of chlorphyll a peaks at violet 400 nm T/F
F: peaks at red (700nm) and violet (400)
accessory pigments absporption spectra peak at:
blue-green, chlorophyll b, carotenoids
why do the absorption spectra of pigments peak at diff nm?
bc of chemical structure
accessory pigments have vertical light absorbing chains T/F
f: carotenoids have a verticla chain; chlorophylls have a light absorbing box called the porphyrin ring w/ a Mg in the centre
what is a photosystem
a pigment-protein complex
describe the structure of a photosystem
antenna complex made of pigment-protein complex; reaction centre: proteins + chlorophyll a + primary e- acceptor
the photosystem aka light harvesting complex T/F
F: the atenna complex is aka light harvesting complex
what happens in a photosystem?
antenna complex absorbs energy; chlorophyll a in rxn centre is oxidized, transferring e- to primary e- acceptor
what is the diff b/w phtosystem 1 and 2
1: max absportion spectrum at 700
2: max absportion spectrum at 680
same chlorophyll a, diff interactions w proteins
which photosystem allowed for oxygenic photosynthesis
2
outline the three phases of chlorophyll P680
1. reduced by water
2. excited by photon
3. oxidized by pheophytin
describe the e- path in photosystem 2
1. oxidized from watter --> p680+ --> p680
2. excited by photon --> p680*
3. oxidized by pheophytin
who is the primary e- acceptor of photosystem 2?
pheophytin
platoquinon is the primary e- acceptor of photosystem II t/f
f: pheophytin
where does the oxygen we breathe come from?
splitting of water by photosystem II to reduce chlorphyll a P680+ --> P680
what happens to H+ when water is split by p680+?
contributes to proton gradient in thylakoid lumen (vs low proton gradient in stroma)
where is photosystem II?
in thylokoid membrane
what is ferredoxin
FeS protein
who is the final e- acceptor in the noncyclic e- pathway?
NADP+, reduced by nadp+ reductase, to NADPH
who transfers the final e-?
ferrdoxin from photosystem 1
outline the linear e- transport
1. photosystem 2 p680 is excited by photon, oxidized by p
what is the purpose of the cyclic e' transport?
to provide additional ATP for the calvin cycle
can operate without photosystem II
no nadp+ --> nadph
how does cyclic e' transport differ from linear?
ferredoxin oxidized and transfers e' to plastoquinone pool, so pool is continually replenished and moves across membrane; remember, plastoquinone is a proton contributor to the gradient
what is the purpose of light absorpotion by the photosystems
creates a molecule, chlorophyll a, that is easily oxidized by the e' transport chain to create a downflow of e'
to increase the energy level of p680 chlorophyll a and p700
outline linear e' transport
1. excitation of p680 by light
how does c02 enter a plant
through stomata pores on leaves
what happenes to leaves on hot days?
they close their stomata pores to prevent h20 from escaping/dehyration; they under photorespiration
what is photorespiration?
- oxygen + rubp instead of c02
- no sugars produced
- protects plant on hot days so stromata can stay closed
c3 plants, wheat, soybeans undergo what type of photosynthesis
regular calvin cycle.