Photosynthesis
, lOMoARcPSD|64062604
MLB111 Unit 3: Photosynthesis
Kirsten Woeber
3.1 Photosynthesis
KEY TERMS
Term Definition
Photosystem A protein-pigment complex that absorbs light
energy and thereby sets the photosynthesis
electron transport chain in motion
Reaction centre Specially configured pair of chlorophyll
molecules where light energy is converted into
electron transport
Antenna A chlorophyll molecule that absorbs energy
from sunlight and passes it to another
chlorophyll molecule during photosynthesis
Carotenoid An orange-yellow light-absorbing pigment in the
photosynthetic membrane
3.1 An Overview of Photosynthesis
3.1.1. Trophic organisms
Organisms classified by where get carbon
➔ Organic compound - hydrogen // carbon
1. Autotrophs
Convert inorganic form of carbon to organic form of carbon → make own food
a. Photo-autotrop
i. Take energy from sunlight, convert into molecules
ii. Eg plants, algae, cyanobacteria
b. Chemo-autotropsh
i. Obtain energy from chemical compounds
ii. Ie don't need any sunlight
iii. Eg sulphur-oxidising bacteria, nitrogen-fixing bacteria, iron-oxidising bacteria
2. Heterotroph
a. Obtain carbon from organic molecules synthesised by other organisms
b. Cant make own organic molecules
Downloaded by Carla Kleijnhans ()
, ENERGY FROM
CO
· Greenhouse gas
· traps heat in the atmosphere global Warming
20 & climate change
CHLOROPHYLL
CO2 + H20 Carbonydrates + O2
PHOTOSYNTHESIS
= + 6 CO2 + 6H20 < Coti2Oo + 602
Respiration
CoHi200 + 602 > 6802 + 6H20 +Ex
, PHOTOSYNTHESIS
anabolic process
carried out by green plants and some microorganism
by which the energy of sunlight is captured
and used to convert carbon dioxide CO2
into more complex carbon-containing compounds
abso
,
뿐
complex
*
PHOTOSYNTHESIS can be increased by :
·
increased survace area for capturing light
·
waxy surface to prevent water loss
, lOMoARcPSD|64062604
MLB111 Unit 3: Photosynthesis
Kirsten Woeber
3.1 Photosynthesis
KEY TERMS
Term Definition
Photosystem A protein-pigment complex that absorbs light
energy and thereby sets the photosynthesis
electron transport chain in motion
Reaction centre Specially configured pair of chlorophyll
molecules where light energy is converted into
electron transport
Antenna A chlorophyll molecule that absorbs energy
from sunlight and passes it to another
chlorophyll molecule during photosynthesis
Carotenoid An orange-yellow light-absorbing pigment in the
photosynthetic membrane
3.1 An Overview of Photosynthesis
3.1.1. Trophic organisms
Organisms classified by where get carbon
➔ Organic compound - hydrogen // carbon
1. Autotrophs
Convert inorganic form of carbon to organic form of carbon → make own food
a. Photo-autotrop
i. Take energy from sunlight, convert into molecules
ii. Eg plants, algae, cyanobacteria
b. Chemo-autotropsh
i. Obtain energy from chemical compounds
ii. Ie don't need any sunlight
iii. Eg sulphur-oxidising bacteria, nitrogen-fixing bacteria, iron-oxidising bacteria
2. Heterotroph
a. Obtain carbon from organic molecules synthesised by other organisms
b. Cant make own organic molecules
Downloaded by Carla Kleijnhans ()
, ENERGY FROM
CO
· Greenhouse gas
· traps heat in the atmosphere global Warming
20 & climate change
CHLOROPHYLL
CO2 + H20 Carbonydrates + O2
PHOTOSYNTHESIS
= + 6 CO2 + 6H20 < Coti2Oo + 602
Respiration
CoHi200 + 602 > 6802 + 6H20 +Ex
, PHOTOSYNTHESIS
anabolic process
carried out by green plants and some microorganism
by which the energy of sunlight is captured
and used to convert carbon dioxide CO2
into more complex carbon-containing compounds
abso
,
뿐
complex
*
PHOTOSYNTHESIS can be increased by :
·
increased survace area for capturing light
·
waxy surface to prevent water loss
