Photosynthesis Flashcards
Discrete particle of packet of energy
Photons
Wavelength range of visible light
400 nm to 700 nm
What happens when a photon is absorbed
energy is transferred to an electron and it moves to a higher level energy state
what molecules are efficient in absorbing photons of specific wavelengths
pigments
what do all pigments have in common
a conjugating system of double/single carbon bonds
what does a blye 450 nm wavelength do to an electron
raise 2 levels
what does a red 700 nm wavlength do to an electron
raise 1 level
Photoautotrophic organism are known as what in the food chain
primary producers
What domains are able to use photosynthesis
Eukarya and Bacteria
Are halobacteria photosynthetic
No
What is photosynthesis
use of light energy to convernt carbondioxide into organic compounds
What is the chemical reaction of photosynthesis
6CO2 + 12H20 -> C6H12O6 + 6O2 +6H20
where are the enzymes of the Calvin Cycle in cyanobacteria
Cytosol
the process where an excited electron from a pigment molecule returns to its ground state, releasing energy or an emission of light
fluorescence
where are photosynthetic pigments embedded
thylakoid membranes
Main pigment in most photoautotrophs
chlorophylls
Accessory pigments
carotenoids
X chain in chlorophyll A
CH3 methyl group
X chain in chlorophyll B
CHO aldehyde group
A plot of how much light is intercepted (absorb) by the pigment
absorption spectrum
why do pigments absorb different wavelengths of light
the energy of the photon has to math the energy required to excite the electron or else nothing happens
how can you measure the rate of photosynthesis
through rate of consumption of CO2 and production of O2
plot of effectiveness of lightat each wavelength during photosynthesis
action spectrum
who produced the earliest action spectra
Theodor Engelmann
